-
Influence of waveforms on the heat transfer behavior of multi-orifice synthetic jet Exp. Heat Transf. (IF 3.5) Pub Date : 2024-04-22 Pushpanjay K. Singh, Harekrishna Yadav, Prabhat K. Upadhyay, Santosh K. Sahu
This experimental investigation aims to analyze the heat transfer capabilities of both single and multi-orifice SJs (MOSJs) for varied waveforms(sine, square, and triangular), at a fixed Reynolds n...
-
Evaluation of heat transfer performance of a channel mounted with square-wing perforated V-type baffles Exp. Heat Transf. (IF 3.5) Pub Date : 2024-04-19 Smith Eiamsa-Ard, Arnut Phila, Chinaruk Thianpong, Varesa Chuwattanakul, Naoki Maruyama, Masafumi Hirota
The current study examines the aerothermal performance behaviors of a rectangular-channel with square-wing perforated V-type baffles (SW-PVBs). The SW-PVBs were attached to lower channel walls at f...
-
SiO2@Cu core-shell nanostructure impregnation on phase changed material (paraffin) for thermal energy storage Exp. Heat Transf. (IF 3.5) Pub Date : 2024-04-16 Neetu Bora, Deepika P. Joshi, Mrinal Kanti Adak
The present research aims to achieve a shape-stable, and leakage-proof material for thermal energy storage (TES). The leakage analysis of 20 wt.% SiO2@Cu PCM shows 0.05%, as a result, more testing ...
-
Experimental study on the effect of modified heated surfaces on the heat transfer performance of deionized water and ethylene glycol binary mixtures Exp. Heat Transf. (IF 3.5) Pub Date : 2024-04-09 Chen Xu, Wanqing Zhu, Zuo-Qin Qian, Jie Ren
With the development of modern industry, the demand for environmentally friendly working fluids is gradually increasing. Although binary mixtures have low global warming potential, their boiling he...
-
Improving heat transfer through alumina-silica nanoparticles suspension: an experimental study on a single cooling plate Exp. Heat Transf. (IF 3.5) Pub Date : 2024-04-05 Saifuddin Khalid, Irnie Azlin Zakaria, Wan Hamzah Azmi, Mohamad Noor Izwan Johari, Wan Ahmad Najmi Wan Mohamed
The urge for more complicated, sophisticated electrically active heat transfer devices, has intensified nowadays thus requiring a more critical thermal management issue. The generation of higher he...
-
Experimental investigation of two-phase immersion cooling with single and multi-fluid systems Exp. Heat Transf. (IF 3.5) Pub Date : 2024-04-02 Pratheek Suresh, V.B. Krishnadasan, Srikanth Rangarajan, C. Balaji
Two-phase immersion cooling has emerged as a promising solution for efficient and effective thermal management in high-performance computing applications. This study presents the results of detaile...
-
An experimental investigation on the influence of Strouhal number and amplitude on the flow and heat transfer behavior of synthetic jet impingement Exp. Heat Transf. (IF 3.5) Pub Date : 2024-03-20 Pawan Sharma, Dnyanesh Mirikar, Santosh K. Sahu, Harekrishna Yadav
Here, tests are performed to analyze the effect of Strouhal number (St) and amplitude on thermo-fluid characteristics of synthetic jet (SJ) impingement for varied range of Reynolds numbers (Re = 30...
-
Experimental investigation on heat transfer and friction factor characteristics for novel hybrid roughness used in solar air heater Exp. Heat Transf. (IF 3.5) Pub Date : 2024-03-18 Shuchi Chaurasia, Ankur Dwivedi, Muneesh Sethi, Ajoy Debbarma, Varun Goel
The influence of heat transfer and frictional characteristics of air that is turbulent and transitting rectangular channel textured by novel hybrid roughness (multi-V shaped ribs combined with hemi...
-
An experimental investigation to assess the thermal performance of a sensible storage based-downward solar air heater Exp. Heat Transf. (IF 3.5) Pub Date : 2024-02-19 M Harikrishnan, R Ajith Kumar, Rajesh Baby, Ajith Kumar S
The primary challenge in widely adopting solar air heater (SAHRR) for the drying of food and agricultural products lies in the intermittent nature of solar radiation. Fluctuations in solar radiatio...
-
Melting and Solidification Characteristic of Mixture of Two Types of Latent Heat Storage Material in Direct Contact Heat Exchanger Exp. Heat Transf. (IF 3.5) Pub Date : 2024-02-19 JikSu Yu, Akihiko Horibe, Naoto Haruki
The aim of this study is to develop a latent heat storage system designed to utilize waste heat from industrial processes in the mid-temperature range of 100–200°C. Mannitol and a mixture of mannit...
-
Experimental investigation of pressure drop and heat transfer in porous media based on 3D printed triple periodic minimum surfaces Exp. Heat Transf. (IF 3.5) Pub Date : 2024-02-05 Mustafa Yasin Gökaslan, Erdem Yıldız
Porous media are widely preferred for heat transfer applications because of complex structure and high porosity. It is relatively easy to produce complex structures with the additive manufacturing ...
-
Flow and heat transfer performance of microchannel heat sinks with circular concave cavities and ribs for water cooling LEDs Exp. Heat Transf. (IF 3.5) Pub Date : 2024-02-01 Zhibiao Tu, Tingbo Hou, Feixiang Jin, Yanhu Lin, Hailang Liu, Huahong Mou
The poor heat dissipation of LED light sources limits their applications in plant factories. This paper combines a microchannel heat sink (MHS) with circular concave cavities and ribs with the wate...
-
Effect of vibration of the condensation plate on the heat transfer during the dropwise condensation on a hybrid hydrophilic-hydrophobic plate using electrostatic spray Exp. Heat Transf. (IF 3.5) Pub Date : 2024-02-01 H. Mahdavi, H. Davar, A Ansari, N.M. Nouri
This research addressed the effect of dynamic stimulation and vibration at different frequencies on the heat transfer in a condensation substrate coated by Danphobix commercial coating containing a...
-
Experiments and modeling of boiling heat transfer of GNP nanofluids with metallic elements Exp. Heat Transf. (IF 3.5) Pub Date : 2023-12-30 Linfeng Xiang, Yindong Song, Dongshu Yang, Ziyun Zhang, Yong Cui, Kambiz Vafai
This study investigates the boiling characteristics of graphene (GNP) nanofluids, graphene-copper (GNP-Cu) composite nanofluids, and graphene-iron (GNP-Fe) composite nanofluids with mass fractions ...
-
Thermo-hydraulic and exergetic analysis of rectangular channel with integrated jet impingement and roughness Exp. Heat Transf. (IF 3.5) Pub Date : 2023-12-30 Rajesh Maithani, Sachin Sharma
This experimental study investigates an innovative approach to enhance surface heat transfer efficiency by employing V-pattern protrusions in conjunction with an impinging air jet. The synergy betw...
-
Experimental investigation and visualization of steam condensation heat transfer on horizontal conical surfaces with microgrooves Exp. Heat Transf. (IF 3.5) Pub Date : 2023-12-27 Leigang Zhang, Hao Li, Bo Xu, Zhenqian Chen, Guopei Li, Meng Ru
This paper presents a novel conical copper plate with microgrooves structure to enhance heat transfer by removing accumulated condensate in horizontal surface condensation. The experimental investi...
-
Intensification of the rate of heat and mass transfer at the wall of a stirred tank reactor by integrating a helical coil turbulence promoter with the tank wall Exp. Heat Transf. (IF 3.5) Pub Date : 2023-12-26 F. Shokry, M. Abd Elfattah, M. H. Abdel-Aziz, H. A. Farag, G. H. Sedahmed, D. A. El-Gayar
The influence of a helical coil turbulence promoter on liquid-solid mass transfer rates in a stirred tank was investigated using a technique that involved measuring the rate of diffusion-controlled...
-
Investigating the influence of flexible flags on heat transfer through experimental analysis Exp. Heat Transf. (IF 3.5) Pub Date : 2023-12-06 Sinan Caliskan, Sertac Samed Seyitoglu
The impact of flexible flags vortex generators (FFVGs) positioned on the channel surface on friction factors and the transfer of heat were examined experimentally in this work. Within the scope of ...
-
Thermal characteristics of metal foamed flat plate with circular and elliptical impinging jets Exp. Heat Transf. (IF 3.5) Pub Date : 2023-12-03 Pradeep Kumar Singh, Jaykumar Joshi, Santosh K. Sahu
Here, the thermal characteristics of open-cell metal foam (OCMF) integrated stainless steel (SS) foil are investigated experimentally during air jet impingement using circular and elliptical nozzle...
-
Investigation of aqueous alcohol solutions as working fluids in an ultra-thin vapor chamber Exp. Heat Transf. (IF 3.5) Pub Date : 2023-11-20 Arunjoy Baruah, John Mathew, Shankar Krishnan
An ultra-thin vapor chamber (1.5 mm thick) has been developed for experimental investigation. Aqueous solutions of propanol exhibiting concentration and thermal Marangoni effects are investigated a...
-
Thermal performance experimental study of a serrated micro-groove ultra-thin aluminum flat heat pipe under different heater locations Exp. Heat Transf. (IF 3.5) Pub Date : 2023-11-16 Guimin Ye, Guochong He, Yuxuan Sheng, Yuhang Chen, Qifei Jian
An ultra-thin aluminum flat heat pipes (UAFHP) with dimensions of 180 × 20 × 2 mm (length×width×thickness) were fabricated by extrusion. The thermal performance of the UAFHP was experimentally test...
-
Force-thermal analysis of large-area microchannel embedded cooling plate in improving thermal management of high-power density data centers Exp. Heat Transf. (IF 3.5) Pub Date : 2023-10-24 Jialiang Yang
A thermal management method for data centers from the server level is proposed in this paper. This paper explores the high energy consumption of the server itself, proposing a principle of microcha...
-
Experimental study on heat transfer characteristics between particle flow and wall Exp. Heat Transf. (IF 3.5) Pub Date : 2023-10-18 Zhong-Liang Fu, Ao-Yu Liu, Yong-Li Xiao, Rui-Feng Dou, You-Ping Zhang, Peng-Yuan Li, Guo-Feng Lou, Zhi Wen
This study experimentally and numerically investigated the characteristics of heat transfer between particle flow and a cylindrical wall. The theoretical model of the heat transfer coefficient calc...
-
The influence of a novel ribbed wave tape on the enhancement of heat transfer in a solar air heater operating in a transitional flow regime: an experimental study Exp. Heat Transf. (IF 3.5) Pub Date : 2023-10-16 Suvanjan Bhattacharyya, Devendra Kumar Vishwakarma, Manoj K. Soni
The effect of a novel ribbed wave tape on the augmentation of heat transfer in a solar air heater operating in a transitional flow regime is experimentally examined. Three different wave ratios are...
-
Turbulent flow-driven liquid-solid mass transfer in serpentine tube heat exchanger/reactors: applications and implications Exp. Heat Transf. (IF 3.5) Pub Date : 2023-10-10 A. S. Fathalla, H. M. Yassine, S. A. Nosier, M. H. Abdel-Aziz, G. H. Sedahmed, M. A. El-Naggar
This study examines liquid-solid mass and heat transfer rates in serpentine tube heat exchangers/reactors under turbulent flow using the copper dissolution technique. Key factors include solution f...
-
Performance improvement of solar air heater duct-employing rib roughness on absorber: an experimental study Exp. Heat Transf. (IF 3.5) Pub Date : 2023-10-10 Ravi Kant, Tabish Alam, Dheerandra Singh, Ahmed Sabeeh
Solar energy is a pure and plentiful source of power for daily activities. Out of many solar thermal system, Solar air heaters (SAHs) are frequently regarded as the most economical and practical me...
-
Thermohydraulic performance of hybrid ribs pattern combining V and arc shape ribs in solar air heater Exp. Heat Transf. (IF 3.5) Pub Date : 2023-09-20 Tabish Alam, Deepak Gupta
Solar energy is a limitless and ecological-friendly renewable energy source, which can be utilized for varieties of application ranging from heating/cooling, power generation, drying, and in heat-p...
-
Experimental study of the thermal characteristic of a double tube heat exchanger with tapered wire coil inserts using PCM-dispersed mono/hybrid nanofluids Exp. Heat Transf. (IF 3.5) Pub Date : 2023-09-14 Sumit Kr. Singh, Vivek Kumar, Amit Kumar, Sujeet Yadav
ABSTRACT An experimental study involving tapered wire coil inserts in a double-tube heat exchanger using water-based phase change material (PCM)-dispersed mono/hybrid nanofluids is conducted. The effects of the wire coils (WC) with nanofluids on the hydrothermal performance of this system are studied for different coil arrangements: converging wire coils (CWC), diverging wire coils (DWC), and converging-diverging
-
Experimental investigation on heat transfer characteristics of upward flow boiling in a vertical narrow rectangular channel Exp. Heat Transf. (IF 3.5) Pub Date : 2023-09-13 Cheng Jin, Leren Tao, Yiwei Ju, Xiefei Zhao, Shengjie Gu, Lihao Huang
ABSTRACT Heat transfer experiment on water flow boiling was carried out in the upward direction under atmospheric pressure through a narrow rectangular channel heated on one-side by vapor having a gap of 2.75 mm, a width of 250 mm, and length of 1400 mm. The heat transfer coefficient and thermal hydraulic thresholds of the flow boiling in forced convective flow, such as the onset of nucleate boiling
-
Experimental and numerical simulation-based investigation for thermal characteristic of frustum roughened solar air heater Exp. Heat Transf. (IF 3.5) Pub Date : 2023-09-06 Dharam Singh, Vikash Kumar
ABSTRACT This research paper aims to investigate the effect of frustum shape roughness geometry on the thermal characteristic (Nusselt no. and friction factor) of solar air heaters (SAH). The study includes experimental and numerical investigation of a solar air heater equipped with frustum roughened absorber plate under varying operating conditions. Frustum shape roughness element produced more disturbances
-
An experimental investigation on the thermal behavior of synthetic jets involving non-circular orifices with varying wave patterns Exp. Heat Transf. (IF 3.5) Pub Date : 2023-08-24 Pushpanjay K. Singh, Prabhat K. Upadhyay, Harekrishna Yadav, Santosh K. Sahu
ABSTRACT The present work reports the thermal behavior of synthetic jets (SJs) with different non-circular orifices and various waveforms such as triangular, sinusoidal, and square. Tests are conducted for the different nozzle-to-plate spacing (1–25) for a given value of Reynolds number (5380). The triangular waveform exhibits better heat transfer for all the orifice shapes. The value of maximum heat
-
Application of Taguchi method and response surface methodology (RSM) for parametric optimization of natural convection heat transfer inside a triangular porous enclosure with in-line rectangular finned array Exp. Heat Transf. (IF 3.5) Pub Date : 2023-08-17 Debasish Das, Abhishek, Pushkal Sharma
ABSTRACT Taguchi method is an experimental design methodology that uses a statistical technique to optimize process parameters while minimizing variability and improving output quality. In this article, Taguchi methodology has been utilized for parametric optimization of the design of a porous triangular enclosure, with an in-line rectangular finned array, to achieve maximum natural convection heat
-
Investigation of free convection heat transfer from vertical cylinders with semicircular fins Exp. Heat Transf. (IF 3.5) Pub Date : 2023-08-01 Yousif Hashim Hussein, Abdulrazzak Akroot, Tahseen Ahmad Tahseen
ABSTRACT In this paper, the effects of three parameters on the thermal performance of the vertical cylinder with semicircular fins was investigated experimentally. The fin shape, fin number and input heat flow on the thermal performance are studied effected. Three different heat sink models (SC-0, SC-40, and SC-50) were contrasted in order to choose the best reference model. The result show that the
-
An experimental investigation on the performance of designed closed reactor system on the thermochemical heat storage of magnesium chloride hexahydrate Exp. Heat Transf. (IF 3.5) Pub Date : 2023-07-29 A.A. Hawwash, Shinsuke Mori, Hamdy Hassan
ABSTRACT In the present study, a lab-scale for closed thermochemical heat storage reactor design is performed for seasonal thermochemical energy storage using magnesium chloride hexahydrate based on dehydration and hydration processes. Firstly, the closed reactor and plate heat exchanger are studied. Then, reactor layout modifications are examined. The dehydration process is performed under 95°C. During
-
Effect of dry ice jet velocity on cooling characteristics of electronic chip based on optimized geometry Exp. Heat Transf. (IF 3.5) Pub Date : 2023-07-03 Jinghong Ning, Luyao Sun, Ziliang Ren, Xue Gao
ABSTRACT Efficient chip cooling has become particularly important with the rapid development of high heat flux electronic chips. In this study, a cooling system for electronic chips using dry ice as the cooling medium is developed. The combination of jet impingement and phase change sublimation was employed to achieve efficient cooling by utilizing the Joule-Thomson effect to generate dry ice. The
-
Area average heat transfer from a vertical flat plate impinged by circular inclined jet Exp. Heat Transf. (IF 3.5) Pub Date : 2023-06-15 Laxmikant Dhruw, Hardik B. Kothadia, Arun Kumar R
ABSTRACT The inclined impinging jets owing to higher efficiency are widely used to disperse concentrated and transient heat loads. The temperature and heat transfer characteristics of jet cooling vertical hot plate at different inclinations are experimentally investigated. Experiments are performed to investigate the area average heat transfer over a flat surface of 600 × 300 mm2 placed at different
-
Influence of thickness of metal foam on the conduction and convection heat transfer for a flat plate with metal foam impinged by a single circular air jet Exp. Heat Transf. (IF 3.5) Pub Date : 2023-06-08 Ketan Yogi, Shankar Krishnan, S.V. Prabhu
ABSTRACT The effect of the metal foam thickness on the conduction and convection heat transfer for a metal foam flat plate impinged by a circular air jet is investigated. The IR thermography and thin-metal foil technique are used for the measurement of local heat transfer. An open-cell aluminum metal foam is used for the metal foam flat plate. A 3D-printed resin foam and detached metal foam flat plate
-
Experimental investigation of effect of iron oxide nanofluids with different morphology on heat transfer of multiple impinging jets Exp. Heat Transf. (IF 3.5) Pub Date : 2023-05-14 Hüseyin Kaya, Emre Alp
ABSTRACT This research aims to experimentally investigate the thermal performance of iron oxide nanofluids having different particle shapes for multiple impinging jet flow. The heat transfer performance of nanofluids with spherical like, faced nanocube and nanowires shapes prepared by hydrothermal synthesis was investigated experimentally. The weight percentage of the nanofluids examined in this study
-
Local heat transfer characteristics of circular multiple air jet impinging on a semicircular concave surface Exp. Heat Transf. (IF 3.5) Pub Date : 2023-05-08 R. J. Talapati, V. V. Katti
ABSTRACT The local heat transfer characteristics of circular multiple air jet impingement on semicircular concave surface were studied experimentally. For constant Reynolds number (Re = 9,000), the effect of jet to concave surface spacing (z/d = 1, 4.2, 6), ratio of curvature (D/d = 4.28, 6, 8.6), jet-to-jet spacing (s/d = 2.4, 4, 5.6), and number of jets were considered. The local heat transfer characteristics
-
Experimental studies of a static flow immersion cooling system for fast-charging Li-ion batteries Exp. Heat Transf. (IF 3.5) Pub Date : 2023-05-03 Hemavathi S, Srirama Srinivas, A S Prakash
ABSTRACT This study explores the performance of a steady-state flow single-phase non-conductive liquid immersion cooling system in a single-cell Li-ion battery under a variety of thermal environments such as 25°C, 40°C, and 60°C and tested at different charge C-rates. The experimental results show that the proposed cooling system exhibited the best cooling performance of less than 5°C and a significant
-
Experimental and Numerical Study of the Effect of Double Row Slot Injection Locations on Film Cooling Performance of a Corrugated Surface Exp. Heat Transf. (IF 3.5) Pub Date : 2023-05-03 Ashutosh Kumar Singh, Kuldeep Singh, Dushyant Singh, Niranjan Sahoo
ABSTRACT Based on experimental and numerical studies the present work proposes an effective injection configuration for film cooling applications on sinusoidal corrugated surfaces. The experimental study is performed for different double-row injection locations (per wavelength) viz. (L0-L25), (L0-L50), (L0-L75), (L25-L50), (L25-L75) and (L50-L75) on the sinusoidal corrugated surface at blowing ratio
-
Interface heat transfer for hydronic heating: heating tests of concrete blocks and numerical simulations Exp. Heat Transf. (IF 3.5) Pub Date : 2023-04-30 Gang Lei, Teng Li, Omid Habibzadeh-Bigdarvish, Xinbao Yu
ABSTRACT A comprehensive understanding of the heat transfer mechanism of hydronically-heated structures is crucial to predicting their heating performance. However, few studies considered the heat transfer at the interface of heating pipe and host material. In this paper, heat transfer at two critical interfaces for hydronically-heated concrete structures, e.g. pipe-concrete interface and concrete-air
-
Experimental study on heat transfer characteristics of spray cooling system with plate-fin heat exchanger Exp. Heat Transf. (IF 3.5) Pub Date : 2023-04-24 Qi Jin, Yanshun Yu, Yaobiao Xia
ABSTRACT An intermittent spray cooling system is applied to fuel cell vehicle heat dissipation using a plate-fin heat exchanger. The effects of various system parameters on cooling performances are evaluated. Experimental results indicate that the cooling performance can be increased by 20% to 80% at various operating conditions and fixed spray area percentage of 45%. An empirical correlation is constructed
-
Experimental and numerical investigation of direct absorption solar collectors (DASCs) based on carbon black nanofluids Exp. Heat Transf. (IF 3.5) Pub Date : 2023-04-19 Shihao Wei, Lisbeth Espedal, Boris V. Balakin, Pawel Kosinski
ABSTRACT Direct absorption solar collectors (DASCs) typically achieve high efficiency due to the volumetric heat absorption process facilitated by the working fluids. In this study, carbon black (CB) nanofluids were utilized as the working fluid to experimentally and numerically investigate the thermal performance of a rectangular DASC. The findings suggest that the nanoparticles have the potential
-
Thermal conductivity and thermal diffusivity of lysozyme crystals, the c-axis of which is magnetically oriented along the direction of the probe wire Exp. Heat Transf. (IF 3.5) Pub Date : 2023-04-09 Syou Maki, Seiichi Tanaka, Kohta Miyagi, Takuma Mori, Yuki Isaka, Masayuki Hagiwara, Seiji Fujiwara
ABSTRACT To verify the anisotropic effect on the thermal properties of hen egg white lysozyme crystals, we measured the thermal conductivity and thermal diffusivity of lysozyme crystals, the c-axis of which was magnetically oriented along the wire direction. We used the transient short hot-wire method in a horizontally tilted superconducting magnet bore. The crystals were magnetically levitated at
-
A heat flux-corrected experimental inverse technique for simultaneously estimating the thermal properties of a metallic medium as functions of temperature Exp. Heat Transf. (IF 3.5) Pub Date : 2023-03-15 Nícolas Pinheiro Ramos, Mariana de Melo Antunes, Sandro Metrevelle Marcondes de Lima e Silva
ABSTRACT This paper presents an experimental inverse approach to simultaneously estimate the temperature-dependent thermal properties of AISI 316 stainless steel. The heat flux conducted to the sample was corrected by using a transducer, evaluating contact resistance at microscopic level, and performing experiments under vacuum. Estimates were severely biased when heat flux correction was not applied
-
Development of correlations for predicting Nusselt number and friction factor of roughened solar air heater duct for sustainable development Exp. Heat Transf. (IF 3.5) Pub Date : 2023-03-15 Karmveer, Naveen Kumar Gupta, Tabish Alam
ABSTRACT The solar air heater (SAH), which utilizes solar energy to satisfy the building’s heating demands, is an important integrated component of the building. However, SAH’s performance isn’t good enough for it to be used in building. Adding roughness component to the effective zone of heat transfer underneath the absorber plate is the most successful and efficient technique to augment the thermal
-
Experimental and numerical study of boiling flow heat transfer of water in a rectangular vertical tube at low flow rate Exp. Heat Transf. (IF 3.5) Pub Date : 2023-03-13 Gao Wu, Yanbo Wang, Jianxin Xu, Rong Chen, Hua Wang
ABSTRACT Flow boiling heat transfer is a promising technology for thermal management. In this paper, flow boiling heat transfer characteristics in a rectangular vertical flow channel are experimentally and numerically investigated at low flow rate. Visualization results provide guidance for the prediction of flow patterns. The flow boiling correlation at low flow rates is improved with an error of
-
Synergistic effect of active-passive methods using fins surface roughness and fluid flow for improving cooling performance of heat sink heat pipes Exp. Heat Transf. (IF 3.5) Pub Date : 2023-02-22 Toktam Ghazi, Mohammad Reza Attar, Amirhossein Ghorbani, Hadeer Alshihmani, Ali Davoodi, Mohammad Passandideh-Fard, Mohammad Sardarabadi
ABSTRACT The continued depreciation of electronic components presents severe challenges for thermal management. Regarding this issue, the current experimental study targets to propose and assess two passive cooling (using a heat sink and rough surface) and two active cooling (air and water cooling) for improving the cooling efficiency of aluminum heat sink heat pipes (HSHPs). In roughening process
-
The influence of the liquid layer height on the velocity field and evaporation during local heating Exp. Heat Transf. (IF 3.5) Pub Date : 2023-02-22 S.Y. Misyura, R.I. Egorov, V.S. Morozov, A.S. Zaitsev
ABSTRACT The Particle Image Velocity method was used to investigate the velocity fields when the liquid layer height changed from 0.6 to 5.1 mm. The loss of stability of the velocity field during local heating is realized at the Bond number (Bo) 0.01–0.02, which is 10–20 times lower than the critical value of Bo(cr) compared to heat exchange at a uniform wall temperature. The Marangoni flow depends
-
Numerical and experimental study of the influence of extended surfaces in rectangular channel subjected to constant heat flux Exp. Heat Transf. (IF 3.5) Pub Date : 2023-02-12 Haneen M. Al-Ali, Naseer H. Hamza
ABSTRACT The current paper reports the impact of variation of ribs’ pitch distance in the case of laminar flow and forced convection heat transfer upon flow characteristics in a rectangular channel experimentally and numerically. The thermal behavior of the ribbed channel with water as a working fluid was measured experimentally and compared to numerical simulations performed using Galerkin finite
-
Experimental study of heat transfer in a microchannel with pin fins and sintered coatings Exp. Heat Transf. (IF 3.5) Pub Date : 2023-02-08 Murat Bulut, Maharshi Shukla, Satish G. Kandlikar, Nedim Sozbir
Increasing processing capacity without modifying the size of electronic devices has made thermal management important in the electronic industry. Commercialized thermal management, such as in a con...
-
Estimation of effective thermal conductivity and heat transfer coefficient of lithium orthosilicate pebble bed in carbon dioxide–air medium Exp. Heat Transf. (IF 3.5) Pub Date : 2023-02-02 N. S. Ghuge, D. Mandal, M. C. Jadeja, B. K. Chougule
ABSTRACT Lithium orthosilicate has the highest absorption capacity among other materials used to capture carbon dioxide (CO2) at a higher temperature. To design a CO2 adsorption system consisting of lithium orthosilicate pebble bed, effective thermal conductivity and heat transfer coefficient data are necessary, and till date, these are not reported in the literature. In the present study, experiments
-
Effect of triangular cross-sectional transverse wedge on the performance of an inline tube bundle heat exchanger Exp. Heat Transf. (IF 3.5) Pub Date : 2023-01-27 Pasada Yisunzam, Anusorn Chinsuwan
ABSTRACT In order to have a heat transfer per volume, heat exchangers have to have high overall heat coefficient. The effects of a transverse wedge on the heat transfer, the pressure drop, and the thermal efficiency factor (TEF) of air flow through a tube bundle heat exchanger was investigated. TEF increases continuously with the wedge aspect ratio (α). Form α = 0.275, 0.550, 0.758 to 1, TEF increases
-
Deposition of CaSO4 on structured surfaces during convective heat transfer for utilization in micro heat exchangers Exp. Heat Transf. (IF 3.5) Pub Date : 2023-01-25 Atefeh Zarei, M. Reza Malayeri
ABSTRACT Micro heat exchangers are characterized by their high surface-to-volume ratio of up to 100,000 m2/m3. Due to superior heat transfer performance, their utilization for pure fluids is gaining increased attention. One major drawback though is the unwanted deposition on their surfaces when subject to fluids which tend to foul. To address this, a better understanding of the deposition process in
-
Impingement heat transfer characteristics of nozzles with inclined exits Exp. Heat Transf. (IF 3.5) Pub Date : 2023-01-19 Vishnu Mudavath, Venugopal Arumuru
ABSTRACT The present study reports experimental investigations on jet impingement parameters such as nozzle shape, nozzle-plate spacing, Reynolds number, and effect of angle of cut for inclined nozzles on heat transfer. It is observed that the stagnation Nusselt number decreases with an increase in the angle of cut for inclined nozzles. Inclined nozzles produced a higher Nusselt number in the transition
-
Experimental study on the temperature measurement of melt blowing fibres through use of infrared thermography Exp. Heat Transf. (IF 3.5) Pub Date : 2023-01-08 Ignacio Formoso, Alejandro Rivas, Juan Carlos Ramos González
ABSTRACT The temperature of melt blowing (MB) and melt spun fibers is frequently measured using infrared thermography (IRT). However, measurements are affected by the size and curvature of the fiber and by reflected radiation from the nozzle. A procedure was developed to obtain accurate measurements of fiber temperature, which corrects fiber size, fiber curvature, and reflected radiation. This procedure
-
Multi-sections solar distiller integrated with solar air heater: numerical investigation and experimental validation Exp. Heat Transf. (IF 3.5) Pub Date : 2023-01-08 A.E. Kabeel, Mohamed R. Diab, M.A. Elazab, Emad M.S. El-Said
ABSTRACT A numerical investigation for a solar air heater integrated with a multi-section solar distiller has been conducted with a novel design of solar distiller with interior sections. A mathematical description of the solar distiller is made and solved with a MATLAB code. The air flow in the solar air heater, the water height in the solar distiller, and the number of interior sections have all
-
In-situ characterization of double-diffusive convection during unidirectional solidification of a binary solution Exp. Heat Transf. (IF 3.5) Pub Date : 2023-01-05 Ila Thakur, Shyamprasad Karagadde, Atul Srivastava
ABSTRACT The work focuses on developing a detailed understanding of the effects of initial composition (Cin) and bottom cooling temperatures (TB) on different characteristics of double-diffusive convection during unidirectional solidification of water-NH4Cl solution in a complete non-intrusive manner. The qualitative investigation, simultaneous quantification of transported parameters (composition
-
Mass and heat transfer at a corrugated wall of a square stirred tank reactor and possible applications Exp. Heat Transf. (IF 3.5) Pub Date : 2022-12-30 A. M. Teamah, S. A. Nosier, G. F. Malash, W. M. El-Maghlany, G. H. Sedahmed, M. H. Abdel-Aziz, A. S. Fathalla
ABSTRACT The electrochemical technique was used to investigate the effect of surface corrugations on the rate of mass and heat transfer (by analogy) in a stirred tank reactor. Impeller rotational speed, impeller shape, corrugation peak to valley height, and corrugation orientation (horizontal or vertical) were among the variables investigated. Depending on the operating conditions, surface corrugation