Electroosmosis of Viscoelastic Fluids: Role of Wall Depletion Layer.

摘要: We investigate electroosmotic flow of two immiscible viscoelastic fluids in a parallel plate microchannel. Contrary to traditional analysis, the effect depletion layer is incorporated near walls, thereby capturing complex coupling between rheology and electrokinetics. Toward ensuring realistic prediction, we show dependence rate on solution pH polymer concentration fluid. In order assess our theoretical predictions, have further performed experiments electroosmosis an aqueous polyacrylamide (PAAm). Our analysis reveals that neglecting existence would result grossly incorrect predictions transport such fluids. These findings are likely be importance understanding electroosmotically driven fluids, including biological confined microfluidic environments.