Investigation of slip boundary conditions in the T-shaped microchannel

Тип публикации: статья из журнала (материалы конференций, опубликованные в журналах)

Конференция: International Symposium on Turbulence Heat and Mass Transfer (THMT); Palermo, ITALY; Palermo, ITALY

Год издания: 2013

Идентификатор DOI: 10.1016/j.ijheatfluidflow.2013.04.002

Ключевые слова: Microflow, Micromixers, Slip conditions, DNS, Turbulence, Asymmetric vortex flows, High Reynolds number, Micro-flow, Slip boundary conditions, Slip condition, T-shaped microchannels, Mixers (machinery), Mixing, Navier Stokes equations, Reynolds number, Vortex flow

Аннотация: Flow regimes and mixing performance in a T-type micromixer at high Reynolds numbers were studied by numerical solution of the Navier-Stokes equations. The Reynolds number was varied from 1 to 1000. The cross section of the mixing channel was 100 mu m x 200 mu m, and its length was 1400 mu m. The transverse inlet channels were symmetric about the mixing channel, and their cross-section was 100 mu m x 100 mu m, and the total length was 800 mu m. Five different flow regimes were identified: (i) stationary vortex-free flow (Re 400). Maximum mixing efficiency is obtained for nonstationary asymmetric vortex flow. In this case, an S-shaped vortex structure is formed in the flow field. The effect of the slip conditions on the flow pattern and mixing efficiency is studied. The slip length varied from 1 to 70 mu m in the calculations. It was shown that the mixing can be controlled by hydrophobic coating. (C) 2013 Elsevier Inc. All rights reserved.

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Издание

Журнал: INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW

Выпуск журнала: Vol. 43

Номера страниц: 161-169

ISSN журнала: 0142727X

Место издания: NEW YORK

Издатель: ELSEVIER SCIENCE INC

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