Dear Enrique Escolano！
I mean the structured 40404 will not be Ok. Can you try this?
The mesh in air must be unstructured.
I have been able to generate a mesh without any problem using GiD 9.1.0b
Rfast, Automatic correct sizes=Normal, transition=0.7
internal volume structured 200x200x4 cells (your applied number of
divisions)
General mesh size=0.1
I’ve obtained about 1.6 Milion of elements
The geometry is very simple, if you are unable to mesh unstructured with the
number of divisions that you want, then you can split your volumes into 27
structured volumes (it’s easy to rebuid it using the copy window)
I attach this kind of splitted model, you can generate the mesh with the
current number of assigned divissions to obtain 9.36 Milion of hexahedra (or
assign less division to avoid so big mesh)
Enrique
----- Original Message -----
From: “CHEN Ningning” xjtucnn at 163.com
To: gidlist at gid.cimne.upc.edu
Sent: Thursday, February 19, 2009 6:18 AM
Subject: [GiDlist] Hi,there is a question about the unstructured mesh on
thin plate
Dear gidlist，！
There is a question about the unstructured mesh.
When I model a thin plate surrounded by air in 3D(the long and width are
100 times than the thickness), I want to using unstructured tetrahedral
elements to mesh the air.
The problem is I want to mesh 4,5 intervals on the thickness direction to
assure the accuracy of the solution, so I need to using structured mesh on
the thin plate.
But when I generate the unstructured mesh on the air, I failed.
I must guarantee the size of edge on the triangle element on the
intersaction of air and plate is almost the same. Just like if I mesh 4,5
intervals on the thickness direction, I must mesh 400-500 intervals on the
direction of the longth or width.
I want to only mesh 40,50 intervals on the direction of the longth or
width, but I can’t generate that mesh.
Are there any parameters which allow me to generate the mesh?
I have set the unstructure size transitions to any value I can, but it
failed also.
My major is computational electromagnetics and there are many problems about
very thick air gap in between the iron.
So it is the problem disturbed me most.
The attachment is my model. Thanks,
Best Regards，
_ CHEN Ningning_
_ 2009-02-19_
Best Regards，
CHEN Ningning
2009-02-28