Migration of macromolecules under flow: the physical origin and engineering implications

摘要: Abstract During flow, an initially homogeneous polymer solution may develop position-dependent concentration gradients due to migration of the molecules with respect bulk flow. We review experimental evidence, especially anomalous observations interest engineers, concerned enhancement (which is sometimes rather dramatic) in heat, mass and momentum transfer during flow such “slipping fluids”. Further, we critically discuss merits various heuristic more fundamental fluid mechanical or thermodynamic models, which attempt explain this phenomenon. show that many theoretical predictions are often conflict each other even qualitatively, reported studies providing direct evidence few. Directions for future work area have been highlighted.