Key result
Triangular thrombus shapes most strongly alter abdominal aortic hemodynamics in computational simulations.
Why the study?
The hemodynamic and heat transfer effects of systolic and diastolic hypertension on abdominal aortic thrombosis with different thrombus shapes under various thermal fluxes were not well characterized.
Computational modeling demonstrates that thrombus shape, particularly triangular, significantly impacts hemodynamics and heat transfer in the abdominal aorta under various physiological states.
Thrombosis is a blood clot formed in the vascular system and obstructs blood flow by reducing the cross-sectional area of blood vessels, posing a great threat to human health. Computational hemodynamics is a well-known method used for numerical simulation of blood flow behaviour. Diastolic and systolic hypertension can be investigated using the FVM and SIMPLE scheme for pressure-velocity coupling. Thanks to the utilization of MRI and DICOM, there is an acceptable 3D geometric accuracy based on which the geometry was constructed. In this study, a numerical study was performed on the behavior of the non-Newtonian blood flow in the abdominal aorta with different shapes of thrombus in three thermal fluxes generated by the body (i.e., running, sleeping, and standing). So, Blood flow behavior in three thrombus shapes of circular, rectangular, and triangular was also explored. This paper reported the influence of dimensionless numbers, including pressure drop, heat transfer coefficient, temperature, and Average Wall Shear Stress (AWSS). Based on clinical data, velocities in the abdominal aorta range from 1 to 1.2 m s−1, and blood temperature is 309.55 K. The results showed that the triangular thrombus was the most effective.
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Kang et al. (2021) studied Abdominal aortic thrombosis. Thrombus shape (circular, rectangular, triangular) and thermal fluxes was evaluated on Hemodynamic parameters including pressure drop, heat transfer coefficient, temperature, and Average Wall Shear Stress (AWSS). In a computational simulation of blood flow in the abdominal aorta, the triangular thrombus shape was the most effective in influencing hemodynamic parameters.
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