A Computational study on k-kl-ω model for flow field and heat transfer on a cylinder in cross-flow

Abstract

In the present computational investigation, the characteristics of heat transfer from cylinders in cross flow of air has been reported, using the commercial CFD software, FLUENT. Unsteady, constant heat flux condition has been applied at the surface and the turbulent flows were simulated using k-kl-ω turbulence model. Comparing for single cylinder, with k-ω (standard), k-ω (SST) and SA models, the k-kl-ω model has been found best suitable models for simultaneous computation of flow field and heat transfer parameters. The results were also compared with experiments performed as well as from reported literatures for Reynolds number range 1.1x104≤Re≤4.1x104 to prove the capabilities of k-kl-ω model. High aspect ratio (18.75) and very low blockage ratio (0.053), has been used to conduct experiments. An analysis of data revealed that the average deviation from the experimental as well as reported values is less than 1%.

Keywords

• Cylinder
• Nusselt number
• pressure coefficient
• flow structure