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 moving edges, 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 alternative method for creating a moving edge is to use rigid material particles set to use the moving boundary condition mode. These particles create grid-based boundary conditions that move with the particle position. They can set velocity or moving temperature and concentration values.