Products: Abaqus/Explicit Abaqus/CAE
Benefits: When modeling an Eulerian material that translates or expands an appreciable amount, moving the Eulerian mesh improves performance by allowing a smaller Eulerian mesh to be created and eases modeling the initial mesh when the deformation path is not known in advance.
Description: By default, material in an Eulerian section moves through the mesh without any mesh deformation. This requires meshing the full deformation path of the Eulerian material and requires foreknowledge of the deformation in the problem to create the initial (static) mesh. If the deformation path is large compared to the size of the region of interest, a prohibitive number of elements must be created with only a small percentage at any given time involved in the region of interest.
Eulerian mesh motion allows the initial Eulerian mesh to expand, contract, and translate during an analysis so it always encompasses a specified material or surface, as shown in Figure 9–1. Allowing the Eulerian mesh to follow the region of interest eliminates uncertainty in creating the initial mesh and utilizes computational resources more effectively by reducing the number of elements required.
Figure 9–1 Eulerian mesh motion resizes the mesh according to the position of the Lagrangian bottle surface.
The parameters that govern Eulerian mesh motion can be modified between analysis steps. In Abaqus/CAE Eulerian mesh motion is defined as a boundary condition in the Load module.
Load module: BCCreate, Category: Other, Types for Selected Step: Eulerian mesh motion