Hydrogen Flow over a Detached V-Shaped Rib in a Rectangular Channel

Abstract

In this paper, a new channel model was designed. The study aims to improve the dynamic and thermal behavior of a turbulent flow of hydrogen by introducing a new complex rib between its hot upper and lower walls. The new shape of the rib allows destabilizing flow with the creation of very strong recirculation cells on its back sides, mixing well fluid in the entire interior of the channel, thus a high thermal transfer. The Reynolds averaged Navier-Stokes (RANS) equations, along with the standard k-ε turbulence model and the energy equation, are used to control the channel flow model. All the equations are discretized by the finite volume method by means of a twodimensional formulation, using the SIMPLE pressure-velocity coupling algorithm. With regard to the flow characteristics, the interpolation QUICK scheme is used, and a second-order upwind scheme is applied for the pressure terms. The results are shown in terms of streamlines, mean and axial velocity fields, dynamic pressure, turbulent kinetic energy, viscosity and temperature fields. This type of analysis is very useful in many industries and engineering related problem for getting good idea about the physical model whenever the analytic solution is out of reach.

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