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<p>Hemodynamics plays an essential role in the cardiovascular system’s pathological and physiological conditions. Hemodynamics is the main factor generating forces sensed by the vessel wall’s mechanoreceptors, which provide an appropriate reaction to maintain homeostasis. Therefore, to evaluate the function of these receptors, it is essential to indicate the dispersal of deformations induced by the hemodynamic domain to the arterial border in pressure zones. This study presents a realistic three-dimensional (3D) aortic arch simulation. The model was reconstructed from CT images. The input boundary condition of the computational model is based on the volumetric flow rate vs. time at the inlet. Also, a user-defined function (UDF) introduces the boundary condition of the computational model outputs based on the pressure versus time curve. It is based on a numerical study using the Fluid–Structure Interaction (FSI) method that was performed in the Ansys 2025 R1 software. First, the hemodynamic domain was analyzed, including the velocity and pressure dispersal in the blood domain. Then, the deformation index in the solid field was obtained. The outcomes indicate that the highest Wall Shear Stress (WSS), pressure, and deformation at peak systole for the aortic arch are 62.1&#xa0;Pa, 12.4&#xa0;kPa, and 1.2&#xa0;mm, respectively. Biomechanical information of the blood domain and the aortic arch wall can be useful in a more precise understanding of how the cardiac systole and diastole processes work.</p>

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Numerical analysis of the effect of hemodynamic forces on a real geometry of the aortic arch for a cardiac cycle

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Arsalan Nikouei,
  • Hossain Nemati,
  • Hamidreza Mortazavy Beni

摘要

Hemodynamics plays an essential role in the cardiovascular system’s pathological and physiological conditions. Hemodynamics is the main factor generating forces sensed by the vessel wall’s mechanoreceptors, which provide an appropriate reaction to maintain homeostasis. Therefore, to evaluate the function of these receptors, it is essential to indicate the dispersal of deformations induced by the hemodynamic domain to the arterial border in pressure zones. This study presents a realistic three-dimensional (3D) aortic arch simulation. The model was reconstructed from CT images. The input boundary condition of the computational model is based on the volumetric flow rate vs. time at the inlet. Also, a user-defined function (UDF) introduces the boundary condition of the computational model outputs based on the pressure versus time curve. It is based on a numerical study using the Fluid–Structure Interaction (FSI) method that was performed in the Ansys 2025 R1 software. First, the hemodynamic domain was analyzed, including the velocity and pressure dispersal in the blood domain. Then, the deformation index in the solid field was obtained. The outcomes indicate that the highest Wall Shear Stress (WSS), pressure, and deformation at peak systole for the aortic arch are 62.1 Pa, 12.4 kPa, and 1.2 mm, respectively. Biomechanical information of the blood domain and the aortic arch wall can be useful in a more precise understanding of how the cardiac systole and diastole processes work.