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Experimental and Model Study of a Swirling Fluid Flow in a Converging Channel As a Simulation of Blood Flow in the Heart and Aorta

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Abstract

Study of swirling flows in channels corresponding to the static approximation of flow channels of the heart and major vessels with a longitudinal–radial profile zR2 = const and a concave streamlined surface at the beginning of the longitudinal coordinate has been carried out. A comparative analysis of the flow structure in channel configurations zRN = const, where N = –1, 1, 2, 3, in the absence and presence of a concave surface was carried out. The numerical modeling was compared with the results of hydrodynamic experiments on the flow characteristics and the shape of the flow lines. The numerical model was used to determine the velocity structure, viscous friction losses, and shear stresses. Numerical modeling of steady-state flows for channels without a concave surface showed that in the channel zR2 = const there is a stable vortex flow structure with the lowest viscous friction losses. The presence of a concave surface of sufficient size significantly reduces viscous friction losses and shear stresses in both the steady state and pulsed modes.

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Funding

This study was supported by the Russian Science Foundation, grant no. 22-15-00148.

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Authors and Affiliations

  1. Bakulev National Medical Research Center for Cardiovascular Surgery, Moscow, Russia

    Y. E. Zharkov, S. T. Zhorzholiani, A. A. Sergeev, A. V. Agafonov, A. Y. Gorodkov &  L. A. Bockeria

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  1. Y. E. Zharkov
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  2. S. T. Zhorzholiani
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  3. A. A. Sergeev
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  4. A. V. Agafonov
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  5. A. Y. Gorodkov
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  6. L. A. Bockeria
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Corresponding author

Correspondence to A. Y. Gorodkov.

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CONFLICT OF INTEREST

The authors of this work declare that they have no conflicts of interest.

ETHICS APPROVAL AND CONSENT TO PARTICIPATE

Animal experiments were conducted in accordance with the National Institutes of Health Guide for the Care and Use of Laboratory Animals (http://oacu.od.nih.gov/ regs/index.htm). Protocols for animal experiments were approved by the Commission on Biological Safety and Bioethics of the Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences (no. 11/2023 dated August 2, 2023).

This study was approved by the local ethics committee of the Bakulev National Medical Research Center for Cardiovascular Surgery of the Ministry of Health of the Russian Federation.

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Zharkov, Y.E., Zhorzholiani, S.T., Sergeev, A.A. et al. Experimental and Model Study of a Swirling Fluid Flow in a Converging Channel As a Simulation of Blood Flow in the Heart and Aorta. Dokl Biochem Biophys 513 (Suppl 1), S36–S52 (2023). https://doi.org/10.1134/S1607672924700777

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  • DOI: https://doi.org/10.1134/S1607672924700777

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