Numerical Simulation of a Heat Transfer Process in a 2D in-Line Tube Bundle by means of RANS Turbulence Meodels

In this article a heat transfer process in the crossflow in an in-line tube bundle was studied. The longitudinal and transverse pitch-to-diameter ratio was 1.3. The Reynolds number was in the range from 3020 to 6040. The 2D unsteady Reynolds averaged Navier-Stokes (URANS) equations were solved numerically, with ten different modeling strategies provided by Fluent CFD code. The working fluid was water with constant properties. SST, RSM EWT, RNG and standard k-ε EWT models have shown a difference for the Nusselt number with the empirical correlation less than 21%. The best agreement with the empirical correlation is obtained for the SST model, the difference is less than 10.4%.