Structured mesh of 3D model "particles in a box": how to do it?
Structured mesh of 3D model "particles in a box": how to do it?
(OP)
Hi,
I am trying to design 3D structured mesh of unit cell model of a material. The model is built as several particles (of complex shape) in a 3D cubic box. I generated Parts, Instances, Sections of the particles and the 3D box, and also produced a Part Matrix (by boolean cutting the instances "particles" from the instance "box").
The particles are much smaller than the box size.
I want to have fine mesh in particles, and more coarse mesh in the matrix outside of particles.
How can i do it?
(I dont want to use Partition because the particles have quite irregular shape). I tried to mesh first particles, then matrix and then merge them (by boolean operation), but it seems not to work well.
Can you advise how to generate such mesh on the basis of Instances/Parts and without Partition?
Thank you
Mika
I am trying to design 3D structured mesh of unit cell model of a material. The model is built as several particles (of complex shape) in a 3D cubic box. I generated Parts, Instances, Sections of the particles and the 3D box, and also produced a Part Matrix (by boolean cutting the instances "particles" from the instance "box").
The particles are much smaller than the box size.
I want to have fine mesh in particles, and more coarse mesh in the matrix outside of particles.
How can i do it?
(I dont want to use Partition because the particles have quite irregular shape). I tried to mesh first particles, then matrix and then merge them (by boolean operation), but it seems not to work well.
Can you advise how to generate such mesh on the basis of Instances/Parts and without Partition?
Thank you
Mika





RE: Structured mesh of 3D model "particles in a box": how to do it?
RE: Structured mesh of 3D model "particles in a box": how to do it?
RE: Structured mesh of 3D model "particles in a box": how to do it?
RE: Structured mesh of 3D model "particles in a box": how to do it?
Apply the coarse global mesh seed to the whole part. Be aware of the minimum mesh size option in that dialog.
Then hide the cell, that represents the overall region, so you just see your particles on screen. Now activate the local mesh seed option and change the selection filter to 'cells'. Select all your particle cells (drag-box, e.g.) and apply the finer local mesh seed. See also the minimum size option here.
RE: Structured mesh of 3D model "particles in a box": how to do it?
RE: Structured mesh of 3D model "particles in a box": how to do it?
Then you can hide/show cells as you like with the display group option.
When using the quick access buttons to hide/show, you get an entity filter below the viewport, were you can choose between instances, cells, faces, edges, ... See CAE Manual 78.1.2 Understanding display group Boolean operations
RE: Structured mesh of 3D model "particles in a box": how to do it?
RE: Structured mesh of 3D model "particles in a box": how to do it?
So, I can hide/show Cells which were connected into the Total body (by boolean merging parts).
But when I try to define free tet mesh and Mesh seeds on the parts, the system says that the parts are dependent and I can mesh them only by making them Independent via Instances or making them Current via Parts. I can not make them independent via Instances because they are supressed (or should I resume these parts?).
So I made the particles current via Parts, and defined Tet Free meshing/fine mesh seed for the particles in the box. Then I made the Matrix Current via Parts, defined the coarse Mesh seed on the Matrix. Then I tried to mesh the full unit Cell. But the mesh created on the full unit cell (which is in fact merged Matrix + Particles) disregarded the fine mesh seed on particles, and simply created the coarse mesh on all the model. Did I do something wrong in the process?