The protocol for using elastic wall model in modeling blood flow within human artery

Medical diagnostic tools will play a major role in the future for an effective patient treatment and reduction their mortality, related to the cardiovascular system diseases (CVDs). There is an urgent need for developing diagnostic procedure to be robust, reliable, accurate and efficient, in the framework of a paradigm shift. Application of numerical techniques is seen as a perspective tool for such purpose. Nevertheless, existing models need constant improvement in development robust, multi-scale models. This paper elaborates on the development of numerical model for modeling blood flow in the aorta section. The deformation of the blood vessel was modeled as two-way fluid–structure interaction (FSI) using ANSYS package. Numerical results have shown that the developed model predicts deformations of the vessels and describes their impact on the pressure, pressure drop and wall shear stresses distributions. Differences between rigid and deformed walls were checked based on pressure drop value. For movable walls, these values were higher both for systole and diastole, which is caused by the local wall compression during aforementioned moments of the cycle. The significant backflow observed during the heart cycle is connected with the deformed walls resulting in temporal blood accumulation. The maximum total deformation of the vessel walls achieved 2.35 mm, and the difference between the maximum and minimum blood volume was equal 5.2%.