The investigation of the height effect of a slit microchannel with a textured wall on its hydrodynamic drag

Описание

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: Siberian Thermophysical Seminar, STS 2021

Год издания: 2021

Идентификатор DOI: 10.1088/1742-6596/2119/1/012050

Аннотация: The numerical investigation of the fluid flow in a slit microchannel with a textured wall was carried out. The effect of the channel height on the hydrodynamic drag coefficient, as well as on the pressure drop in such channel and the effective slip length on the wall for various Reynolds numbers, are presented in the paper. The chaПоказать полностьюnnel length was 100 µm, and its height was varied from 25 µm to 500 µm. The Reynolds number was varied from 0.1 to 100. The main studied characteristics were compared to the similar ones obtained for a channel with normal walls (no-slip conditions). It was found that the pressure drop in such textured microchannel was lower as compared to a conventional channel for any of its heights and for any Reynolds numbers. The dependences of the relative pressure drop, effective slip length, and drag coefficient on the Reynolds number were obtained for different channel heights. The drag coefficient was described as 20/Re for the average values of the channel height. A correlation that describes the dependence of the friction factor on the Reynolds number for small and large heights of the channel was proposed. The accuracy of the proposed correlation was about 90%. © 2021 Institute of Physics Publishing. All rights reserved.

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Издание

Журнал: Journal of Physics: Conference Series

Выпуск журнала: Vol. 2119, Is. 1

Номера страниц: 12050

ISSN журнала: 17426588

Издатель: IOP Publishing Ltd

Авторы

  • Lobasov A.S. (Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation, Institute of Thermophysics SB RAS, 1 Lavrentyev pr., Novosibirsk, 630090, Russian Federation)
  • Minakov A.V. (Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation, Institute of Thermophysics SB RAS, 1 Lavrentyev pr., Novosibirsk, 630090, Russian Federation)

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