CFD simulations of abdominal aorta-renal artery junctions showed that areas with time-averaged wall shear stress <0.4 Pa and oscillatory shear index >0.15 are more susceptible to atherosclerosis.
Computational fluid dynamics simulations of the abdominal aorta-renal artery junction indicate that specific hemodynamic parameters (TAWSS < 0.4 Pa and OSI > 0.15) at the bifurcation region predispose to atherosclerosis.
The use of computational fluid dynamics (CFD) to study hemodynamics in arteries offers significant potential for addressing complex flow problems. Due to its enhanced performance hardware and software, CFD has become an important approach for studying hemodynamics in human arteries. This approach is utilized to investigate hemodynamics and forecast risk factors for atherosclerotic lesion development and progression, including circulatory flow, and to analyze local flow fields and flow profiles resulting from geometric changes. This foundational study will aid in analyzing blood flow behavior through the abdominal aorta and the origin and courses of renal arteries, as well as investigating the causes of disorders such as atherosclerosis and hypertension. The current study investigates three idealized abdominal aorta–renal artery junction models under varying blood pressure settings. Materialise software V19 was used to extract the geometry data to create idealized 3D abdominal aorta–renal branching models. Unsteady flow simulations were performed in ANSYS Fluent, utilizing rigid walls and Newtonian and Carreau–Yasuda viscosity conditions. Oscillatory shear index (OSI) and Time-averaged wall shear stress (TAWSS) were measured to enhance understanding of atherosclerotic plaque formation and progression. Also, the effect of geometric change at the bifurcation area was explored, and it was discovered that this location causes considerable vortex forming zones. The evident velocity reduction and backflow development were seen, reducing shear stress. The findings indicate that low TAWSS 0.15 areas within the bifurcation region are more susceptible to atherosclerosis development.
Beloor et al. (Fri,) conducted a other in Atherosclerosis. Computational fluid dynamics simulations was evaluated on Oscillatory shear index (OSI) and Time-averaged wall shear stress (TAWSS). CFD simulations of abdominal aorta-renal artery junctions showed that areas with time-averaged wall shear stress <0.4 Pa and oscillatory shear index >0.15 are more susceptible to atherosclerosis.
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