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Investigation of the effect of three parameters in the GEKO model on the calculation results for backward facing step flow
- 1 Kunshan High School of Jiangsu Province
* Author to whom correspondence should be addressed.
Abstract
Computational fluid dynamics (CFD) is a field which is attracting more and more focus today for its ability to simulate comprehensive conditions. Reynolds-Averaged Navier-Stokes (RANS), which needs low cost, is one of the most popular methods used in engineering. However, RANS method has insufficient ability to simulate separated flow, which is a major challenge at present. One reason for this is that the model parameters introduce uncertainty into the simulation. This research investigates the effect of three parameters in the Generalized k-ω (GEKO) two-equation turbulence model on the calculations in backward facing step flow. It is found that C_sep has the greatest influence on the calculation of pressure coefficient and friction coefficient. C_nw has the greatest influence on the reattachment calculation through eddy-viscosity. The calculation results of the three variables show that there is correlation between them. Besides, a better set of parameters is obtained, which will improve the calculation accuracy for these three variables.
Keywords
Computational fluid dynamics, turbulence model, backward facing step, parametric analysis.
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Cite this article
Hu,Y. (2024). Investigation of the effect of three parameters in the GEKO model on the calculation results for backward facing step flow. Theoretical and Natural Science,56,32-39.
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The datasets used and/or analyzed during the current study will be available from the authors upon reasonable request.
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Volume title: Proceedings of the 2nd International Conference on Applied Physics and Mathematical Modeling
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