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

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 zR 2 = const and a concave streamlined surface at the beginning of the longitudinal coordinate has been carried out. A comparative analysis...

Full description

Saved in:
Bibliographic Details
Published in:Doklady. Biochemistry and biophysics 2023-12, Vol.513 (Suppl 1), p.S36-S52
Main Authors: Zharkov, Y. E., Zhorzholiani, S. T., Sergeev, A. A., Agafonov, A. V., Gorodkov, A. Y., Bockeria, L. A.
Format: Article
Language:English
Subjects:
Aorta
Biochemistry
Biological and Medical Physics
Biomedical and Life Sciences
Biophysics
Blood flow
Comparative analysis
Computer Simulation
Fluid flow
Friction
Heart
Hemodynamics - physiology
Life Sciences
Models, Cardiovascular
Shear stress
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 zR 2 = 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 zR N = 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 zR 2 = 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.
ISSN:1607-6729
1608-3091
DOI:10.1134/S1607672924700777