×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Linear temperature distribution

Linear temperature distribution

Linear temperature distribution

(OP)
Hello all.

I know temperature in a pipe at both ends of the tube and i would like to apply a linear distribution of temperature along the line (I will make a thermal-structural coupled analisys). Can someone help me?
I can do it node by node with a little pdl program, but i can't understand if there is a simplest way.

Thanks.

RE: Linear temperature distribution

Hi,
If you're using PDL code then is your front-end Patran? The simplest route may depend on the solver too, eg if it's Abaqus then you can create a function (specifying the spatial variation, eg as a table) and then pick this function when applying your temperature over the area. Other codes like Nastran and Femap have similar functionality like "=26*xnd(i!)" for using the x-coordinate of the current node, for example.

The best route can be to find out how your solver handles this, then work back through the front-end's translation table for different solvers to see how to put it in...

Good luck!
MToft

RE: Linear temperature distribution

(OP)
Excuse me. I forgot to tell you that I'm working with ANSYS.
Can you help me?
Thanks

RE: Linear temperature distribution

If it's a linear temperature distribution with known temperatures at the ends of the pipe, then just run a steady state therma analysis and store the temperatures to be read in as a thermal load for the strucural analysis. Temperatures between the ends of the pipe will have a linear variation.

corus

RE: Linear temperature distribution

> Temperatures between the ends of the pipe will have a linear variation

Not necessarily, depends on the geometry and/or the direction in which the temperature gradient acts. Sounds easy enough to write a bit of APDL and apply the temperatures through a series of either "D" or body force "BF#" commands. Once these are applied and solved (antype,static) you can use the "LDRE" command to read the thermal loadcase in (jobname.rth) and apply as a structural-thermal load.

Cheers,

-- drej --

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources