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Boundary Condition Types

There are two fundamental ways to specify what is happening at a boundary, and two corresponding fundamental boundary condition types:

Flux conditions specify how the surroundings affect and interact with the model at the boundary, often expressed as an applied force, flux, or current. This type of boundary condition is also called a Neumann boundary condition.









Constraints specify the result of the interaction between the model and its surroundings, expressed as expected values of the dependent variables. This type of boundary condition is also called a Dirichlet boundary condition.
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Boundary Condition Types

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