How does wall slippage affect hydrodynamic dispersion?

作者: Chiu-On Ng

DOI: 10.1007/S10404-010-0645-9

关键词: Slip (materials science)ConvectionWall slipSlippageResidence time distributionMechanicsSlip ratioTaylor dispersionChemistryMaterials ChemistryElectronic, Optical and Magnetic MaterialsCondensed matter physics

摘要: How hydrodynamic dispersion is affected by wall slip remains to be fully understood. An attempt made in this article looking into issue for some elementary pressure-driven flows. Both the long-time Taylor–Aris and early-phase convection-dominated are investigated, analytically numerically, respectively. The mean variance of residence time distribution also examined. In basic case where walls a parallel-plate channel have equal lengths, general reduce spread solute cloud finite either increasing convection speed or decreasing dispersivity. However, effect on can diminished even reversed unequal lengths and/or phase exchange with wall. regime following recently proposed transport-based method, determine how elution profiles may change axial positions depending slip.

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