Numerical Simulation of the Separated Flow Past Around a Square Block Based on the Two-Fluid Turbulence Model

Abstract

The increasing computer performance makes it possible to use numerical simulation as an alternative to the physical experiment. However, accuracy of the turbulent flow simulation significantly depends on the turbulence model used. The paper presents numerical results of the turbulent external flow around a square block based on the two-fluid model with Re = 24,000. The turbulence model is implemented in the three-dimensional form. The control volume method is introduced in difference approximation of the original equations; relationship between speed and pressure is found using the SIMPLE procedure, where convective terms are approximated by the semi-implicit upstream scheme, and diffusion terms --- by the central differences. Comparison between experimental data and the existing turbulence models demonstrates good convergence for the coarse computational grid. This indicates the model ability to adequately describe the unsteady anisotropic turbulence. Another advantage of the model lies in its simplicity in regard to numerical implementation and good stability. Thus, the two-fluid model could be recommended in studying turbulent flows that are more complex

Please cite this article in English as:

Madaliev M.E., Kuchkarov A.A. Numerical simulation of the separated flow past around a square block based on the two-fluid turbulence model. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2024, no. 2 (113), pp. 35--56 (in Russ.). EDN: JZNUCN

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