Turbulence over/inside porous surfaces and challenges to its modelling

21st Fluid Mechanics Conference

物理学;力学

Suga, K.^1 ; Kuwata, Y.^1

Department of Mechanical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan^1

关键词: Eddy viscosity model;    Fully developed flows;    Modeling porous medias;    Multi-scale;    PIV measurements;    Porous surface;    Porous walls;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/530/1/012004/pdf
DOI  :  10.1088/1742-6596/530/1/012004

学科分类：力学，机械学

来源: IOP

【 摘 要 】

To understand turbulence over porous media, a series of PIV measurements were carried out in porous-wall channel flows. The porous walls were made of three types of foamed ceramics which had the same porosity but different permeability. For turbulence inside porous media, LES studies of fully developed flows in several model porous media were performed. Referring to these databases, a multi-scale κ- four equation eddy viscosity model for turbulence around/inside porous media was developed. The proposed model was validated with satisfactory accuracy.