Performance Analysis of OpenFOAM, COMSOL Multiphysics and Ansys Fluent in Imulating 2D Channel Flow with Sudden Expansion
DOI:
https://doi.org/10.71310/pcam.5_69.2025.03Keywords:
Navier-Stokes equations, RANS approach, SST model, OpenFOAM, COMSOL, Multiphysics, Ansys FluentAbstract
This paper presents a detailed comparative analysis of the numerical results of the 2D Backward Facing Step (2DBFS) problem. using modern software packages OpenFOAM, COMSOL Multiphysics and Ansys Fluent. The study covers a comprehensive comparison of such key parameters as the pressure (Cp) and friction (Cf) coefficients on the bottom wall of the channel, as well as the velocity profiles and Reynolds stresses in different sections along the flow. To carry out the analysis, the same computational grid with the same discretization parameters and similar numerical schemes was used, which made it possible to minimize the influence of grid effects on the calculation results. The main objective of the work was to identify software that provides the highest accuracy of calculations when modeling flow in a channel with a backward-facing step. During the study, numerous computational experiments were conducted, the results of which were compared with reference experimental data provided by NASA. This allowed us to evaluate the reliability and validity of the computational methods of each of the software packages under study.
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