Difference between revisions of "Grid-Based Boundary Conditions"
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== Introduction == | == Introduction == | ||
Grid-based boundary conditions are used for fixed edges, for applying displacements with mopving edges in small-displacement problems, and for setting boundary temperature or concentration. Fixed edges are created be setting velocity to zero. The use of a moving edge to apply displacements, however, is limited to small displacements because in large-displacement problems, the particles may move away from the boundary conditions and the conditions will no longer have the correct influence. The preferred method for creating a moving edge is to use rigid material particles. | Grid-based boundary conditions are used for fixed edges, for applying displacements with mopving edges in small-displacement problems, and for setting boundary temperature or concentration. Fixed edges are created be setting velocity to zero. The use of a moving edge to apply displacements, however, is limited to small displacements because in large-displacement problems, the particles may move away from the boundary conditions and the conditions will no longer have the correct influence. The preferred method for creating a moving edge is to use [[Rigid Material|rigid material]] particles and the [[Rigid Material#Moving Boundary Condition|moving boundary condition mode]]. These particles create grid-based boundary conditions that move with the particle position. | ||
== Scripted Commands == | == Scripted Commands == | ||
== XML Commands == | == XML Commands == | ||
Revision as of 10:04, 20 December 2013
Grid-based boundary conditions are applied to nodes on the grid and can set velocity, temperature, and concentration.
Introduction
Grid-based boundary conditions are used for fixed edges, for applying displacements with mopving edges in small-displacement problems, and for setting boundary temperature or concentration. Fixed edges are created be setting velocity to zero. The use of a moving edge to apply displacements, however, is limited to small displacements because in large-displacement problems, the particles may move away from the boundary conditions and the conditions will no longer have the correct influence. The preferred method for creating a moving edge is to use rigid material particles and the moving boundary condition mode. These particles create grid-based boundary conditions that move with the particle position.