Key result
Waviness in the wall of arteries and veins creates a recirculation zone at the crest and trough, leading to a reduction in velocity and wall shear stress depending on wave pitch and depth.
Computational modeling demonstrates that arterial and venous tortuosity alters local hemodynamics by creating recirculation zones that reduce velocity and wall shear stress.
The present work is focused on the study of hemodynamic characteristics for tortuous arteries/veins. Tortuosity in arteries/veins is defined by introducing waviness in the wall of the tube. Analysis is further extended for bifurcated veins with and without wavy walls. Waviness is defined by two geometric parameters; pitch and depth of the wave. Four different combinations of pitch and depth are studied and compared with a plain straight wall. The present study is carried out numerically by using a computational fluid dynamics tool. Hemodynamics for a steady flow of blood is investigated through pressure, velocity, and wall shear stress distribution. Waviness in the wall of arteries/veins creates a recirculation zone at the crest and trough of the wall. Occurrence of the recirculation zone leads to reduction in velocity which in turn reduces wall shear stress. Variation in the magnitude of the velocity and corresponding wall shear stress at the crest and trough of the wavy wall depends on the pitch and depth of the artery/veins (tube).
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Kotian et al. (2023) studied Tortuous arteries/veins. Waviness in the wall of the tube (arteries/veins) vs. Plain straight wall was evaluated on Hemodynamics (pressure, velocity, and wall shear stress distribution). Waviness in the wall of arteries and veins creates a recirculation zone at the crest and trough, leading to a reduction in velocity and wall shear stress depending on wave pitch and depth.
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