Numerical investigation of heat transfer augmentation through geometrical optimization of vortex generators

Abstract

Abstract:In this paper a two-dimensional numerical simulation of a steady incompressible and turbulent model has been carried out to study the effects of vortex generators in a compact heat exchanger in a curvilinear coordinate system. The mesh which is applied in this study is boundary fitted and has been smoothed by a Laplace operator. Experimental data of a former study has been applied to validate the numerical results. The effects of geometrical variation are studied by adjusting vortex generators' inclination and relative cross location. The major issue of this study is the optimal trade-off by selecting an optimal geometric, considering the opposite influences of geometrical variation on Nusselt number and pressure drop.PACS (

Numerical analysis on longitudinal location optimization of vortex generator in compact heat exchangers

“…The most effective design factors that are related to geometry are span angle and relative location of vortex generators. However, the effect of vortex generator's inclination has been widely investigated through numerical modeling performed in the same geometric and fluid flow conditions as the study by Gorji et al [17]. In the present study, the effect of relative distance of two adjacent vortex generators on heat transfer and pressure drop was investigated.…”