عنوان مقاله [English]
Low-density lipoprotein (LDL), which is recognized as bad cholesterol, typically has been regarded as a main cause of atherosclerosis. An abnormal accumulation of LDL in the artery wall and, as a result, in the formation of LDL oxide, can lead to atherogenesis. Therefore in present study, the concentration boundary layer of LDL in a straight artery is investigated numerically. The governing equations consist of continuity, momentum conservation and the LDL transport in the blood based on appropriate boundary conditions have been solved using one of the most powerful computational fluid dynamics techniques known as Projection method. Results are obtained and presented as profiles and contours of concentration, blood velocity and wall shear stress, which are in good agreement with numerical and analytical results of previous studies. Effects of factors such as: filtration velocity and wall shear stress on the LDL surface concentration and concentration boundary layer thickness are investigated. The results show that increasing the wall suction (high blood pressure) and reducing the Wall Shear Stress (WSS) results in an increase in the surface concentration of LDL. Increasing the Reynolds number and the Schmidt number decreases the concentration boundary layer thickness, and LDL surface concentration increase about 7% higher than that of the bulk flow.