Effect of secondary flows on dispersion in finite-length channels at high Peclet numbers
DOI: 10.1063/1.4820214
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摘要: We investigate the effects of secondary (transverse) flows on convection-dominated dispersion pressure driven, open column laminar flow in a conduit with rectangular cross-section. show that significantly reduce (enhancing transverse diffusion) Taylor-Aris regime [H. Zhao and H. Bau, “Effect dispersion,” Anal. Chem. 79, 7792–7798 (2007)], as well convection-controlled regime. In (i.e., finite-length channel axial at high Peclet numbers) properties boundary layer values scaling exponents controlling dependence moment hierarchy number m out (n)∼Pe eff θn are determined by local near-wall behaviour velocity. The presence strongly modify localization consequently exponents. Different second...
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