Abstract
The work presents the numerical study of fluid flow in a two-dimensional channel with a sudden expansion (H/h = 2). In order to study the flow, a number of flow characteristics are calculated at Reynolds numbers ranging from 100 to 800. The calculations are performed for the laminar flow regime based on the numerical integration of the unsteady Navier–Stokes equations. Results are obtained for longitudinal velocity profiles in different channel cross sections behind the ledge, as well as lengths of primary and secondary vortices at different Reynolds numbers. The distribution of the bottom-wall friction coefficient along the channel length at varying Reynolds numbers is presented. The control volume method is employed for the approximation of the initial equations, while the relationship between velocities and pressures is determined through the application of the SIMPLE procedure. The QUICK (Quadratic Upstream Interpolation for Convective Kinematics) scheme of Brian P. Leonard, the second-order accuracy scheme of McCormack, the third-order accuracy scheme of Warming–Kutler–Lomax, and the fourth-order accuracy scheme of Abarbanel–Gottlieb–Turkel are employed to numerically solve the problem. To validate the numerical results, a comparison with the experimental data, sourced from the literature, is conducted.
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Madaliev, M.E. Comparison of Numerical Schemes for the Problem of Laminar Flow in a Suddenly Expanding Channel. Theor Found Chem Eng (2024). https://doi.org/10.1134/S0040579524601055
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DOI: https://doi.org/10.1134/S0040579524601055