Abstract
Interaction of two dimensional vortex blobs with finite core, particularly their convective merging, is investigated numerically by the use of the discrete vortex method, in which each vortex blob is replaced by a group of a number of point vortices. The numerical experiment is performed for the two cases. One is the interaction of two identical vortex blobs, and the other is the interaction of three vortex blobs with the same strength, where two of them have a like-signed circulation and the rest has the opposite. The results clarify the process of convective merging of two like-signed vortices and the effect of the third opposite-signed vortex to the merging.
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