XANSYS Message: 25783 [Go back to message list]
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Subject: Re: *MOPER with beta MAP function...
Author: Mike McNamee
Date: 2001-07-10 21:31:00

Dear John S.,

The regular mapping seems reasonably fast when full vector math is used for
calculations, right up until I try to introduce a point outside the domain
where it can sometimes slow to a near stop.

I can see how nearest edge or extrapolated would be handy at times for
interpolating from a different mesh resolution... In this case, though, I'm
solving a diff. eq. and want to stop when the position is outside of the
domain. I guess I'd like to have some mechanism to know that the position
has gone beyond the edge of the domain. A zero result would be fine or
another array which would store a MAP 'status' would also suffice. Having
control over the 'out of bound' behavior might be worthwhile through an
additional argument.

Thanks, for the rapid reply.

Sincerely,
Mike McNamee
PADT

Michael R. McNamee
Analytical Engineer
CFD & Multi-Discipline Simulation
Phoenix Analysis & Design Technologies
1465 N. Fiesta Boulevard, Suite 107
Gilbert, AZ 85233

mike.mcnamee@p...
www.padtinc.com

Phone: (480) 813-4884
Fax: (480) 813-4807

-----Original Message-----
Sent: Tuesday, July 10, 2001 6:09 PM
To: 'xansys '
Cc: John Swanson

The procedure looks for each point in all possible triangles
(tetrahedrons), and if it
does not fall inside or on the edge (face) of any triangle (tetrahedron), it
assumes that it is outside the region.
Thus there is no fast way of determining if a point is 'out of bounds'.
What it does to the out of bounds values could be modified.
Possibilities include:
1. Nearest edge value
2. Zero
3. Extrapolated value

Comments?

John Swanson
Swanson Analysis Services, Inc.

> -----Original Message-----
> From: Mike McNamee [SMTP:mcnamee@p...]
> Sent: Tuesday, July 10, 2001 8:59 PM
> To: 'xansys '
> Subject: [XANSYS] *MOPER with beta MAP function...

> Dear xansys,

> Does anybody know if there is a way to turn off the 'out of bounds'
> extrapolation with the new beta (v5.7) 'MAP' option for *MOPER? I'd like
> to see it just return zero (rapidly) instead of an extrapolated value
> (slowly). Or, at least is there an undocumented flag that can be checked
> to
> see which of the last mapped points were within the domain so as to stop a
> macro from continuing to look at them?

> Thanks,
> Mike McNamee
> PADT

> Michael R. McNamee
> Analytical Engineer
> CFD & Multi-Discipline Simulation
> Phoenix Analysis & Design Technologies
> 1465 N. Fiesta Boulevard, Suite 107
> Gilbert, AZ 85233

> mike.mcnamee@p...
> www.padtinc.com

> Phone: (480) 813-4884
> Fax: (480) 813-4807

Posts possibly associated with message #25783AuthorDateScore
25781*MOPER with beta MAP function...Mike McNamee2001/07/10 
25782Re: *MOPER with beta MAP function...John Swanson2001/07/10 
25783Re: *MOPER with beta MAP function...Mike McNamee2001/07/10 
25793Re: *MOPER with beta MAP function...Gordon May2001/07/11 
25802Re: *MOPER with beta MAP function...John Swanson2001/07/11 
25806Re: *MOPER with beta MAP function...Gordon May2001/07/11 
25822Re: *MOPER with beta MAP function...Mike McNamee2001/07/11 
25823Re: *MOPER with beta MAP function...John Swanson2001/07/11 
25830Re: *MOPER with beta MAP function...Mike McNamee2001/07/11