Mixed boundary conditions refer to a type of boundary condition used in the context of partial differential equations (PDEs), where different types of conditions are applied to different parts of the boundary of the domain. Specifically, a mixed boundary condition can involve both Dirichlet and Neumann conditions, or other types of conditions, imposed on different sections of the boundary.
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A mixed boundary condition imposes different kinds of boundary conditions on different portions of the boundary. A common elliptic example combines a Dirichlet boundary condition on one portion with a Neumann boundary condition on the remainder.
Multiple boundary conditions for different parts of the boundary.