Summary: Resolve unexpected flow results near resistances.
Flag
DRSmoothing A
A < 0: disables velocity smoothing
A = 0 (On): yields 5 velocity smoothing sweeps to a resistance region (default)
A > 0: the specified value is the number of smoothing cycles
Description
A smoothing algorithm was introduced into CFdesign 2011 that improves velocity results near resistance materials. This algorithm assumes that the flow passes through the resistance, instead of deflecting off of it, and smooths the flow vectors using the upstream velocities. These upstream velocity values provide the direction for the downstream nodes. If the upstream nodes deflect the flow, then all downstream velocities will be deflected creating an odd looking vector field.
To use the older algorithm, set the argument to < 0. This disables the smoothing algorithm, and produces results consistent with CFdesign 2010.