抄録
Strong vortex convection can be generated by placing a V-shaped plate in a horizontal flow. Experimental investigation was conducted in linear stratified flow under variation of Reynolds numberRe, Richardson numberRi and dihedral angle of the V-plate. It was found that the maximum vortex rising height can be attained with a dihedral angle of about 90°. Large eddy simulation model with non-uniform mesh and non-staggered grid scheme was used to study the flow structure that shed from the plate. Experimental and numerical results conclude that the rising height of produced vortices may reach 6 times the plate height and weakly depends on Reynolds number in homogeneous flow. It has reduced in stratified flow to 4 times of the plate height withRi=0.12 and smaller than 3 times with Ri larger than 0.4. The simple V-shaped structure efficiently generated upwelling current that can be used as mixing for environment purpose
