Тип публикации: статья из журнала
Год издания: 2022
Идентификатор DOI: 10.1016/j.csite.2022.101791
Ключевые слова: cfd, slip conditions, slip length, temperature jump, thermal creep
Аннотация: This paper presents a study of the influence of various factors on heat transfer in microchannels associated with the use of the velocity slip (including thermal creep) and temperature jump boundary conditions on the walls. These factors can affect heat transfer both individually and together, but their effect on heat transfer in tПоказать полностьюhe microchannel has still not been practically studied. An attempt to eliminate this lack was made in this paper. It was shown that as the slip length increases the value of the heat flux density increases by about 40% and the average heat transfer coefficient increases by about 50% compare to no-slip conditions. Wherein, the pressure drop significantly decreased, that is, two positive effects took place simultaneously. The presence of thermal creep also reduced the pressure drop in the channel and increased the average heat transfer coefficient, but this effect was significantly less than the effect of the slip length. On the other hand, the taking into account of a temperature jump on the wall led to a certain increase in the pressure drop, but the heat transfer coefficient increased. © 2022
Журнал: Case Studies in Thermal Engineering
Выпуск журнала: Vol. 31
Номера страниц: 101791
ISSN журнала: 2214157X
Издатель: Elsevier Ltd