Numerical Study of 2D Planar Grid-Induced Turbulence: Reynolds Stress Model Parameterization

Employing turbulence generators known as the single square grids (SSGs) or square fractal grids (SFGs) can promote effective forced convective heat transfer, thus holding great potential in augmenting the thermo-fluid performance of flow engineering systems. The above, however, requires fine-tuning of their geometrical parameters for the generated turbulence to possess properties that are favorable in promoting heat transfer. Hence, this research develops a low-cost computational framework to adequately express turbulence evolution behind SSGs and SFGs, followed by applying the developed framework to quantify the effects of grid geometry and flow speed on grid-induced macroscopic flow dynamics and heat transfer characteristics.