Flow topology associated with disjoint eddies in an asymmetric film-splitting problem

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Abstract
In a film-splitting problem where recirculation is present, theoretical arguments lead to the joint eddy flow topology, where two eddies, attached to the interface, share a common streamline, and the disjoint eddy topology, where only one eddy attaches to the interface. The second, interior eddy is then separated from the former by a meandering streamtube. The disjoint eddy topology is shown to be generic if any asymmetry source is present. Original measurements of the velocity vector field are combined with spectral element simulations of the flow to support the theoretical developments.