Numerical study on forced convection heat transfer and pressure drop for different configurations of corrugated channels

Abstract

A numerical study to investigate the effects of different corrugated channel configurations on the flow and thermal fields are performed with Reynolds number from 6000 to 20000 and heat flux of 6000 W/m2. The simulation adopts FLUENT- based control volume to solve the turbulent flow field and the associated thermal behaviour of the different configurations of corrugation. Seven types, in three groups, of trapezoidal corrugated channels; i.e., one face outward (1FOC), one face inward (1FIC), inward on one face and outward on opposite face (2FIOC). Moreover, two faces inward (2FIC), two faces outward (2FOC), outward and inward are aligned on both surfaces (IAO), and outward and inward are staggered on both surfaces (IOSIO), were examined and compared with smooth one. Simulated results displayed that the 2FIC provides maximum friction factor and heat transfer rate than the others. The performance evaluation criterion (PEC) values decrease with increasing Reynolds number, and the highest was predicted for 1FOC and 2FOC in turbulent flow. PEC comparative evaluation of the influence of flow regime on corrugated channel configurations showed that the (PEC) in laminar regime (600 ≤ Re ≤ 2000) increases and the 2FOC seem to have better values. However, laminar regime offered higher value than the turbulent flow. Computed results are validated as they have an acceptable agreement with the findings of previous works as well as with the existing well-established correlations.