Open Boundary
Use this node to set up transport across boundaries where both convective inflow and outflow can occur. On the parts of the boundary where fluid flows into the domain, an exterior value of the level set function is prescribed. On the remaining parts, where fluid flows out of the domain, a condition equivalent to the Outflow node is instead prescribed.
The direction of the flow across the boundary is typically calculated by a fluid flow interface and is provided as a model input to the Level Set interface.
Level Set condition
Specify Level Set Condition according to one of the following options:
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 Fluid 1 ()
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 Fluid 2 ()
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 Specify level set function explicitly
When the Specify level set function explicitly is selected, the level set function must be specified explicitly. The value must be in the range from 0 to 1, where the default is 0.