VORTEX CONVECTION PRODUCED BY V-SHAPED DIHEDRAL OBSTRUCTION

Strong convection can be produced by placing a V-shaped plate in a horizontal flow. Vortices that shed from the plate coalesce with neighboring ones to form a horseshoe-shaped vortex. The self-induced upward motion produced due to the shape and the flow converging and surmounting the plate raises the vortex head, resulting in the vertical convection. The dependence of the motion of the three-dimensional vortex filaments on the dihedral angle of the V-shaped dihedral plate and Reynolds number of the mean flow have been numerically simulated. It was found that the maximum vortex raising height can be attained with a dihedral angle of about 90-degrees.