[femm] Re: tutorial

[Dcm3c@xxxxxxx]

In a message dated 11/7/99 4:16:08 AM Eastern Standard Time, Marctt2@xxxxxxx 
writes:

> Is there any tutorial available, other than the user's manual ? I'm having 
> trouble defining materials after I have my geometry drawn.

Recently, Ian Stokes-Rees has generously written up a brief tutoral that 
covers the mechanics of how one gets a model "up and running" in femm. I 
have just put it up on the femm website, and it's located at:
http://members.aol.com/GMagnetics/tutor/tutor.htm

Anyhow, the attachment of material properties to a specific region of the 
geometry is sort of a frequently asked question. I should make up a formal 
FAQ list. My usual answer to this one is:

To specify a material for a specific block label, first make sure that you 
are in "block label" mode. The "green circles" icon should be pressed in on 
the toolbar if you are in block label mode. Then, to assign a specific 
material to a particular block label:

1) Select the block label that you are interested in by moving the mouse 
pointer on top of the block label and clicking with the right mouse button 
one. The block label will turn red, denoting that it is selected.

2) Press the space bar to "open" the node. A dialog will appear with entries 
for "Block Type" and "Side Length." You specify the material by picking the 
appropriate material off of the "Block Type" drop list. You can set the 
spacing between nodes in the block via the "Side Length" specification. The 
default is 0, which chooses node spacing so that the smallest number of nodes 
is used that yields a "good" (in the sense of no really obtuse triangles) 
mesh. Usually, you will want to choose a number that forces a somewhat 
denser mesh.

3) Hit the "Ok" button when your material and side length are specified. A 
ring will appear around the block label, denoting the approximate size of the 
elements to be meshed in the region associated with the block label.

Note: Before you can assign materials to specific blocks, some material 
types must have previously been defined. If you are starting a new problem 
from scratch, you define materials from the problem either by defining them 
from scratch via the Properties|Materials|Add Property chain of selections 
off of the main menu, or by adding from the materials library via the 
Properties|Materials Library selection off of the main menu.

Dave.
--
http://members.aol.com/dcm3c