Grid-Based Boundary Conditions

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.