12.13.12 Including the Wall Reflection Term

If the RSM is used with the default model for pressure strain, ANSYS FLUENT will, by default, include the wall-reflection effects in the pressure-strain term. That is, ANSYS FLUENT will calculate $\phi_{ij,w}$ using this equation (in the separate Theory Guide) and include it in this equation (in the separate Theory Guide). Note that wall-reflection effects are not included if you have selected the quadratic pressure-strain model.

The empirical constants and the function $f$ used in the calculation of $\phi_{ij,w}$ are calibrated for simple canonical flows such as channel flows and flat-plate boundary layers involving a single wall. If the flow involves multiple walls and the wall has significant curvature (e.g., an axisymmetric pipe or curvilinear duct), the inclusion of the wall-reflection term in this equation (in the separate Theory Guide) may not improve the accuracy of the RSM predictions. In such cases, you can disable the wall-reflection effects by turning off the Wall Reflection Effects under Reynolds-Stress Options in the Viscous Model dialog box.