If the RSM is used with the default model for pressure strain, FLUENT will, by default, include the wall-reflection effects in the pressure-strain term. That is, FLUENT will calculate using Equation 12.7-7 and include it in Equation 12.7-4. Note that wall-reflection effects are not included if you have selected the quadratic pressure-strain model.
The empirical constants and the function
used in the calculation of
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
12.7-7 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 panel.