Flow field characteristic and heat transfer performance in a channel with miniature square filament

The miniature square filament (MSF) is a kind of miniature cuboid vortex generator (MCVG). The effects of a single MCVG (MSF) immersed in various turbulent regions on the original flow and heat transfer performance in a rectangular channel are studied with large eddy simulation. The results show that the synthesis performance coefficients of the cases that setting MCVG in the buffer layer or the logarithmic law region are greater than 1. However, the synthesis performance coefficient of the case that setting MCVG in the viscous sublayer is lower than 1. Moreover, by setting MCVG in the channel, the friction coefficient reduces up to 8.67%, the Nusselt number increases up to 7.04%. The synthesis performance coefficient increases up to 7.39%, and the maximum synthesis performance coefficient is achieved in the case that setting MCVG in the buffer layer. (C) 2020 Elsevier Ltd. All rights reserved.