Outflow
The Outflow node is the preferred boundary condition at outlets where the species are to be transported out of the model domain. It is useful, for example, in mass transport models where it is assumed that convection is the dominating effect driving the mass flow through the outflow boundary. This node is available for exterior boundaries. The boundary condition is applied to all species and corresponds to one of the following equations depending on the selected diffusion model:
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For the Maxwell–Stefan Diffusion Model:
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For the Mixture-Averaged Diffusion Model:
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For the Fick’s Law Diffusion Model: