RECTANGULAR MESH in ANSYS

[kis]

Hi,

Simple question:

Suppose I have a rectangle. I want to discretize it to create a mesh.
The elements in the mesh must be rectangle, finer near the 4
boundaries and coarser in the middle. I used ANSYS to do the task but
instead of getting perfect rectangular elements, I got coarser skewed-
rectangles spreading in the middle and finer near-rectangular elements
near the borders.

Can anybody help me to operate ANSYS to do this simple task.


Irfan

[Martin Liddle]

In message

Post by kis
Suppose I have a rectangle. I want to discretize it to create a mesh.
The elements in the mesh must be rectangle, finer near the 4
boundaries and coarser in the middle. I used ANSYS to do the task but
instead of getting perfect rectangular elements, I got coarser skewed-
rectangles spreading in the middle and finer near-rectangular elements
near the borders.
Can anybody help me to operate ANSYS to do this simple task.

Why do you think it is a simple task? You could do it by subdividing
the rectangle into smaller areas and using the mapped mesh transition
capability described in section 7.4.2.1.4 of the ANSYS Modelling and
Meshing Guide but you will still get elements where the corner angles
are not 90 degrees.