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Subject: Re: [STRUC][THERM].About transient time stepping
Author: Edmund Singer
Date: 2008-04-24 15:30:57

See Martins post. It is applicable. Your time stepping in ansys has
nothing to do with what your time step in the table is. It will
interpolate.

Just make sure the table resolves the heat input you are looking for,
and then make sure the ansys timestep resolves the solution correctly.

BAE Systems
Edmund Singer P.E.
Staff Engineer
Applied Mechanics Group
Fluid and Thermal Sciences



-----Original Message-----
From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
Behalf Of antonio
Sent: Thursday, April 24, 2008 12:17 PM
To: ANSYS User Discussion List
Subject: Re: [Xansys] [STRUC][THERM].About transient time stepping

Hi Mike,

To resume the problem, what I want to do is to load a table on ANSYS
with my HGEN time dependent values (Calculated with another code) and
apply them as a loads. Since I calculated those values with a very fine
mesh It could be interesting to use a broader time stepping for my
ANSYS solution (although my table will have much more information) in
order to reduce my computational time.

Antonio Lafuente
PhD Student
UPM Madrid

On Thu, 2008-04-24 at 11:03 -0400, Yaksh, Mike wrote:

> Hi Antonio
>
> You need to specify how the heat is dependent on the temperature or
some
> other boundary condition. If you have neutron fluence (?) specified
and
> then maybe the heat generation is a function of the neutrons, and
maybe
> this is a function of temperature or deformation. This would require
an
> iterative procedure, but the overall flow chart of what variables
other
> variables is needed, first.
>
> Mike Yaksh
> NAC International
> Norcross GA
>
> -----Original Message-----
> From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
> Behalf Of antonio
> Sent: Thursday, April 24, 2008 12:19 PM
> To: xansys_at_xansys.org
> Subject: [Xansys] [STRUC][THERM].About transient time stepping
>
> Hi all,
>
> I'm trying to run a thermo-mechanical transient simulation using
direct
> coupled method with plane13 elements. My problem is that the generated
> heat I have follows a time dependent law governed by nuclear physics
> which I've obtained using another code. I would like to impose that
load
> in my problem, with an appropiate tie stepping, but after RTFM and
RTFM
> again and looking through the verification manual I don't see very
clear
> how I could do this. There's a lot of information, I know I should use
a
> data table and some more things, but I'm having real difficulties to
put
> it all in order and define a correct path to follow. Does anyone with
> experience on this could recomend me some kind of tutorial or give me
a
> hand on it? Thanks in advance
>
> Regards
>
> Antonio Lafuente
> PhD Student
> UPM Madrid
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Posts possibly associated with message #93010AuthorDateScore
93006Re: [STRUC][THERM].About transient time steppingMike Yaksh2008/04/24 
93007Re: [STRUC][THERM].About transient time steppingMartin Liddle2008/04/24 
93008Re: [STRUC][THERM].About transient time steppingantonio 2008/04/24 
93009Re: [STRUC][THERM].About transient time steppingantonio 2008/04/24 
93010Re: [STRUC][THERM].About transient time steppingEdmund Singer2008/04/24 
93011Re: [STRUC][THERM].About transient time steppingantonio 2008/04/24 
93012Re: [STRUC][THERM].About transient time steppingantonio 2008/04/24