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Subsection 8.6.3: Prescribed Initial Conditions Up Section 8.6: Guidelines for Multiphasic Analyses Subsection 8.6.5: Prescribed Electric Current Density

### 8.6.4 Prescribed Effective Solute Flux

The finite element formulation for multiphasic materials in FEBio requires that the natural boundary condition for solute be prescribed as , where is the effective solute flux. For a mixture containing only neutral solutes ( ), it follows that .
Subsection 8.6.3: Prescribed Initial Conditions Up Section 8.6: Guidelines for Multiphasic Analyses Subsection 8.6.5: Prescribed Electric Current Density