Numerical study of flow past a circular cylinder using SSTκ-ω, LES and ELES formulations. (2015)

• Record Type: Journal Article
• Authors: Hu, H.Z.; Hu, H.X.; Jiang, S.L.; Zheng, Y.G.
• Is Part Of: Progress in computational fluid dynamics. Volume 15:Number 4(2015)
• Page Start: 203
• Page End: 213
• Publication Date: 2015
• Subjects: shear stress transport -- SST models -- large-eddy simulation -- embedded LES -- ELES -- circular cylinders -- computational costs -- computational fluid dynamics -- CFD -- turbulence modelling -- fluid flow -- steam generator -- nuclear power plants -- NPP -- nuclear energy -- flow field -- velocity distributions -- hydrodynamic forces -- recirculation regions -- flow past obstacles -- flow-induced vibration; Fluid dynamics -- Data processing -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 620.10640285
• Languages: English
• ISSNs: 1468-4349

Abstract

A comparison study of the flow past a circular cylinder is carried out using SSTκ-ω, LES and ELES models according to the practical conditions in a steam generator of a nuclear power plant. The behaviour of different models in predicting the flow field, velocity distributions, hydrodynamic forces and their computational costs is evaluated by the published data. The results show that the three models can predict the gradual and symmetrical distributions of three pairs of the recirculation regions behind the cylinder. However, they behave differently in predicting the separation angles, hydrodynamic forces and CPU time. The present work has benefits for better understanding the flow past obstacles and the associated flow-induced vibration.