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Numerical Simulation of the Effect of Evaporation of Liquid Droplets on Turbulence and Heat Transfer in a Droplet-Laden Flow behind a Backward-Facing Step

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Abstract

The effect of evaporation of several types of liquid (water, ethanol, acetone, and glycerol) on the turbulence dynamics, propagation of the dispersed phase, and heat transfer in a backward-facing step for the droplet diameter \(d_{1}\) = 1–100 \(\mu\)m and mass fraction \(M_{L1}\) = 0–0.1 was studied numerically. The two-fluid two-temperature Euler model was used for calculation of the motion and heat transfer in the droplet-laden flow. The system of Reynolds-averaged Navier–Stokes equations (RANS) written down with consideration of the presence and evaporation of droplets of different liquids was used in the work. The turbulent kinetic energy of the carrier gas phase was described using the model of transfer of the Reynolds stress model with consideration of the two phases of the flow. The effect of suppression of the turbulence of the carrier gas phase is minimal for acetone droplets (more than 7%) and maximal for glycerol and water droplets (up to 15%). The heat transfer enhancement at the use of ethanol droplets is maximal (more than two times compared with the single-phase separated flow), and evaporation of acetone droplets led to minimum heat transfer intensification (up to 25%).

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Authors and Affiliations

  1. Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    M. A. Pakhomov & V. I. Terekhov

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  1. M. A. Pakhomov
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  2. V. I. Terekhov
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Correspondence to M. A. Pakhomov or V. I. Terekhov.

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Pakhomov, M.A., Terekhov, V.I. Numerical Simulation of the Effect of Evaporation of Liquid Droplets on Turbulence and Heat Transfer in a Droplet-Laden Flow behind a Backward-Facing Step. J. Engin. Thermophys. 31, 580–588 (2022). https://doi.org/10.1134/S1810232822040051

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  • DOI: https://doi.org/10.1134/S1810232822040051

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