Volume 15, Issue 11 (1-2016)                   Modares Mechanical Engineering 2016, 15(11): 253-262 | Back to browse issues page

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Torabi A, Alafzadeh M, Shirani E, Nili Ahmadabadi M. Combine lattice Boltzmann and Finite Volume methods for simulating blood flow and LDL concentration in vessel. Modares Mechanical Engineering 2016; 15 (11) :253-262
URL: http://mme.modares.ac.ir/article-15-6712-en.html
Abstract:   (8379 Views)
The purpose of this paper is to investigate theLow-Density Lipoproteins (LDL) mass transfer in vessel walls using the Lattice Boltzmann Method (LBM). High Schmidt number of LDL leads to numerical instability of LBM.In order to solve this problem, LBM and finite volume method (FVM) are combined.In this hybrid method, the blood velocity field is solved by LBM using the single relaxation time, SRT, model and FVM has been used for LDL concentration equation. LBM is able to simulate flow and mass transfer for the Schmidt number, Sc, up to 3000 only if the time consuming multi relaxation time is used. However, the purposed hybrid method suggested in this article can be used to solve the problem for Sc as high as 107. Good agreement between our results obtained from the hybrid simulation and the available results in the literature and noticeable decrease in CPU time compared with when the LBM is used for both flow and mass transfer, indicates the ability of the hybrid method.Finally, the hybrid methodis used to simulate the mass transfer of LDL particles and investigate the effective factors for increasing the surface concentration, such as the size of LDL particles, wall suction velocity, wall shear stress, Newtonian and non-Newtonian fluids behavior and change of concentration boundary layer with various Schmidt number.
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Article Type: Research Article | Subject: Biomechanics
Received: 2015/05/23 | Accepted: 2015/09/15 | Published: 2015/11/1

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