Numerical Investigation of Flow Past a Backward-Facing Step Using a Multi-Scale Turbulence Model

Abstract:

The flow past a backward-facing step was simulated using both the multiscale turbulence model based on the variable interval time average method and the standard k-ε model based on the Reynolds average method. The numerical method used in this simulation is an unstructured staggered mesh scheme. The capability of the multi-scale model to simulate flow past a backward-facing step has been validated. Both pressure coefficient and mean velocity profiles downstream are in agreement with experiments. Moreover, the results predicted by the multi-scale model are better than that predicted by the standard k-ε model. The computational results show that the multiscale turbulence model can successfully simulate this type of separated flow.

• Periodical: Applied Mechanics and Materials (Volume 654)
• Pages: 45-50
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.654.45
• Online since: October 2014
• Authors: He Dong*, Zhi Qiang Li, Ge Gao, Zhong Shi, Jian Guo, Wen Dong Tang
• Keywords: Backward Facing Step, Flow Separate, Multi Scale, Numerical Simulation, Turbulence Model

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