Effect of stent struts angle on body vessel shear stress at different heat fluxes

Today, there are many methods for treating coronary artery blockage. Doctors determine the type of treatment according to many parameters, such as the patient's age and the degree of arterial blockage. A method of arteriosclerosis treatment is stenting. The body's activity in different conditions causes different thermal heat fluxes on the artery. This study was to obtain the optimum angle of the stent struts to get the suitable wall shear stress at different thermal heat fluxes of 5, 10, and 15 W m−2, which were applied in two conditions on the artery and stent; the first, the heat flux was applied on entire geometry of the artery and the stent, the second, the heat flux was applied only on the stent. For simulation, the finite volume method (FVM) and simple schemes were employed; furthermore, the Carreau viscosity model was selected for the non-Newtonian viscosity model. In addition, PLA stent material was considered in this study. The best optimum angle for stent struts was 61 degrees. It was also observed that the heat flux does not affect wall shear stress, axial and radial blood velocity profiles, and blood temperature on the artery centerline.

Subjects

DDC Class

600: Technology

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Effect of stent struts angle on body vessel shear stress at different heat fluxes