Average contra-rotation and co-rotation of line segments for flow field analysis

15th Asian Congress of Fluid Mechanics

物理学;力学

Šistek, Jakub^1 ; Kolá, Václav^2

Inst. of Mathematics, Czech Acad. Sci., itná 25, Prague 1

CZ-11567, Czech Republic^1

Inst. of Hydrodynamics, Czech Acad. Sci., Pod Patankou 5, Prague 6

CZ-16612, Czech Republic^2

关键词: Co rotation;    Complex flow structures;    Flow field analysis;    Line segment;    Radial line;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/822/1/012070/pdf
DOI  :  10.1088/1742-6596/822/1/012070

学科分类：力学，机械学

来源: IOP

【 摘 要 】

The earlier concept of the average co-rotation of infinitesimal radial line segments near a point is extended to the case of contra-rotation. The tensor of the contra-rotation is introduced and averaged over "all planar cross sections" going through the examined point. Both the average contra-rotation and co-rotation, representing shear-free quantities, are applied to describe a complex flow structure.