Document Type : Original Article
Author
Aerospace Engineering Urmia University of Technology
10.22034/jast.2023.376159.1139
Abstract
Minimizing the computational cost and improving the convergence speed is the main goal of any computational design. In this regard, due to the low convergence speed of the traditional iterative method of fluid flow solution, a new method to improve the traditional iterative method is applied. In this paper, two-dimensional fluid flow in a channel with an aspect ratio of 10, uniform inlet velocity, constant outlet pressure, and no-slip conditions at the walls is studied using the Lattice-Boltzmann Method. The speed of convergence of the solution is increased by verifying that the mass flux is conserved between the inlet and each channel section. The solution time of channel flow obtained by Lattice-Boltzmann Method for Reynolds number of 100 and three types of grids 40x400, 60x600 and 80x80 are 261, 1039 and 4264 s, respectively. Based on the results, by introducing a flow rate control in each channel section of these three types of grids, the solution time is reduced by 35, 266, and 1590 seconds. This method can be implemented not only for normal but also for channel with an obstacle. According to the results, the speed of convergence increases by at least 2 times using this method
Keywords
Main Subjects
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