Numerical Investigation of Flow in an Asymmetric Plane Diffuser Using a Multi-Scale Turbulence Model

Abstract:

The flow in an asymmetric plane diffuser 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 in an asymmetric plane diffuser has been validated. Pressure coefficient, frictional resistance 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: 51-56
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.654.51
• Online since: October 2014
• Authors: Zhong Shi, Zhi Qiang Li, Ge Gao, He Dong*, Jian Guo, Wen Dong Tang
• Keywords: Adverse Pressure Gradient, Multi-Scale, Numerical Simulation, Separated Flow, Turbulence Model

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