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Subsubsection 3.12.2.10: Fluid Normal Traction Up Subsection 3.12.2: Surface Loads Subsubsection 3.12.2.12: Fluid Tangential Stabilization

#### 3.12.2.11 Fluid Backflow Stabilization

In a fluid or fluid-FSI analysis, this boundary condition prescribes the normal component of the viscous traction (Section 3.12.2.8↑), , 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>