Theory Manual Version 3.4
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Subsection 3.6.12: Special Boundary Conditions Up Subsection 3.6.12: Special Boundary Conditions Subsubsection 3.6.12.2: Tangential Stabilization

#### 3.6.12.1 Backflow Stabilization

Let the normal component of the viscous traction be given by Then, the contribution of this traction to the virtual external work is The linearization of along an increment in the relative velocity is given by where Similarly, The discretized form of is whereas the discretized form of is with and
Subsection 3.6.12: Special Boundary Conditions Up Subsection 3.6.12: Special Boundary Conditions Subsubsection 3.6.12.2: Tangential Stabilization