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126.96.36.199 Fluid Backflow Stabilization
In a fluid or fluid-FSI analysis, this boundary condition prescribes the normal component of the viscous traction (Section 188.8.131.52↑), , such that it opposes backflow, i.e., when is negative. Specifically, when and otherwise, where is a unitless user-defined parameter (typical values may range from 0 to 1) and is the referential fluid density.
<surface_load type="fluid backflow stabilization" surface="surface1">> <beta lc="1">1</beta> </surface_load>