Effect of Upstream Fin Length on Longitudinally Finned Flat Tubes Bank Performance Based on Constructal Design and Fuzzy Logic Control

The present study considers two-dimensional laminar incompressible flow over a longitudinally finned flat tube bank heat exchanger (LFFTBHE) based on the constructal design method and the Fuzzy logic control.The impact of Reynolds number (Re) and dimensionless upstream fin length (Lu/DT) on the LFFTBHE performance was studied.The finite volume method using a commercial CFD package (ANSYS 2022/R2) was used to solve the governing equations.Fuzzy logic control was used to optimize the results.The results showed that the upstream fin length insignificantly impacted the Nusselt and Bejan numbers.Increasing the dimensionless upstream fin length, i.e., from 0.4 to 1, decreased the Nusselt number up to 10.3% at Re=1200.However, the dimensionless upstream fin length increase increased the Bejan number up to 28.8% at Re=1200.