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Theory Manual Version 3.6
 Subsection 3.6.9: Linearization of -\int_{B}\Grad\delta J^{f}\cdot\mathbf{W}\,dV Up Section 3.6: Weak Formulation for FSI Subsection 3.6.11: Fluid traction acting on solid interface 

3.6.10 Body force term

The body force term may be discretized as To linearizes this expression, we first evaluate it in the material domain, Now,
The discrete forms of these expressions are given by where where
 Subsection 3.6.9: Linearization of -\int_{B}\Grad\delta J^{f}\cdot\mathbf{W}\,dV Up Section 3.6: Weak Formulation for FSI Subsection 3.6.11: Fluid traction acting on solid interface