Abstract
The numerical results of a rigorous mathematical analysis of fluid flow in the neighborhood of a rotating disk inserted into a liquid interface supporting an adsorbed surface film are presented. The theory (described in detail elsewhere) takes full account of the coupling of interfacial and substrate fluid flows, which is to say that it removes the deficiency present in previous theories of surface viscometry which assumed that these flows are independent. It is shown that in the low surface viscosity region the results are sensitively dependent upon the coupling of interfacial and substrate motion. Finally we demonstrate that the rotating disk viscometer is a poor experimental design for the determination of low surface viscosity.
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