A Class of Exact Solutions of Two-Dimensional Viscous Flow
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概要
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A viscous two-dimensional flow of shear layers superimposed on a stagnation-point flow is investigated. This situation allows an exact solution of unsteadyNavier-Stokes equation of an incompressible fluid in free space for a generalinitial condition. The solution is exemplified for several sorts of initial condition.One of them represents a flow in a balance between viscous diffusion and con-vective confinement of vorticity in the final asymptotic state. Another shows aflow field of collision of two shear layers of opposite senses, which is forced tocome into contact by the imposed flow, and this collision results in 'pair annihi-latuon' of the vortical layers. The decay of the vortex strength of the layer showsa similarlity behaviour for different Reynolds numbers. A comment is givenabout a possible dissipation mechanism in free flows.
- 社団法人日本物理学会の論文
- 1983-03-15
著者
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