Effects of stenosis and RBC motion on mass transfer in the microvessels using immersed boundary-lattice Boltzmann method

Document Type: Article

Authors

1 Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, 8415683111, Iran

2 Foolad Institute of Technology, Fooladshahr, Isfahan, 8491663763, Iran

3 Department of Physics, Imam Khomeini International University, Ghazvin, 3414896818, Iran

4 Department of Biomedical Engineering, AmirKabir University of Technology, Tehran, 1591634311, Iran

Abstract

In this work, for better understanding of microvessels disorders, mass transfer at a stenotic and the straight capillary wall in the presence of RBC motion is investigated. The immersed boundary- lattice Boltzmann method is used for this purpose. The erythrocyte is considered as an immersed biconcave shaped tissue around the capillary as a porous media. The gamma function for input concentration, which is close to the actual stenosis brain capillary, is used. The simulated results obtained for both stenosis and straight capillaries are compared. It is shown that while the RBC motion has negligibly small effects on wall mass transfer in straight capillaries, its effect is not negligible at stenosis capillaries.

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