Abstract
The aim of the study is to determine the effect of a randomly generated rough surface on the laminar flow of a fluid in a microchannel. Two-dimensional axially symmetric microchannels with a circular cross-section in the range of Reynolds number Re = 100-1700 were considered. Flow numerical simulations were performed using the Ansys / Fluent software.
Highlights
The rapid development of miniaturization observed in the last decade has provided new scientific problems and technological challenges
In recent decades, a lot of experimental research has been carried out on microchannels. Some of these studies indicate a change in the nature of the flow with a lower critical Reynolds number value than in the macro scale, as well as a greater roughness coefficient occurring in channels with a small hydraulic diameter
The article presents the results of numerical tests of the influence of randomly modeled roughness on the flow and friction losses in microchannels
Summary
The rapid development of miniaturization observed in the last decade has provided new scientific problems and technological challenges. In recent decades, a lot of experimental research has been carried out on microchannels Some of these studies indicate a change in the nature of the flow with a lower critical Reynolds number value than in the macro scale, as well as a greater roughness coefficient occurring in channels with a small hydraulic diameter. It is suggested by the increase of the roughness effect together with the decrease of the channel size (Dai et al 2014, Zhang et al 2010)
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