Optimal configuration of vortex generator for heat transfer enhancement in a plate-fin channel

[+] Author and Article Information
Tariq Amin Khan

Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China

Wei Li

Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China

1Corresponding author.

ASME doi:10.1115/1.4038418 History: Received April 08, 2017; Revised September 07, 2017


This work is dedicated to numerical investigation and optimization of vortex generator's (VG) configuration in a plate-fin channel. Three dimensional numerical simulations are performed to study the effect of angle of attack, attach angle (angle between VG and wall) and shape of VG on the fluid flow and heat transfer characteristics. The flow is assumed as steady state, incompressible and laminar within the range of studied Reynolds numbers (Re = 380 - 1140). The effect of attach angle is highlighted and results show that attach angle of 90o might not necessary for enhancing the heat transfer. The flow structure and heat transfer characteristics of certain cases are analyzed in detail. The parameters of VG are then optimized for maximum heat transfer and minimum pressure drop. The three independent design parameters are considered for the two objective functions. For this purpose, CFD data, response surface methodology (RSM) and a multi-objective optimization algorithm (MOA) are combined. The CFD data are used to train a BRANN (Bayesian-regularized artificial neural network). This in turn is used to drive the MOA to find the optimal parameters of VGs in the form of Pareto front. The optimal values of these parameters are finally presented.

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