×
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

How to apply spatially changing film coefficients on a aurface

How to apply spatially changing film coefficients on a aurface

How to apply spatially changing film coefficients on a aurface

(OP)
I want to do a steady state thermal simulation of a channel whose film coefficients I know.
I have a flat surface that I want to apply a film coefficient, h, that varies in one direction (x). I have the data in excel (film coefficient at different x locations). How do I apply this to the flat surface? I have seen that I can input data in XML format. I don't, however, know how to transfer my excel data to XML as I do not know how ANSYS wants is or even how to do it.
Any help would be hugely appreciated. Is there a tutorial on how to do this?

Thanks everyone!

RE: How to apply spatially changing film coefficients on a aurface

You'll have to work in Ansys Mechanical APDL (black background), but you should be able to map spatially varying film coefficients onto a surface by indexing their values in a table with the *DIM command.

When dealing with thermal boundary conditions, I find it useful to apply them to surface effect elements so that you can grab things like the amount of heat flowing through a given area (see ETABLE). If you do that, you can use the SFE command to apply the loads. It should go something like this:

1. Create a *DIM table:
*DIM,convection_table,table,...
convection_table(1,0)=...
convection_table(1,1)=...

2. Create surface-effect elements and select them
cmsel,s,my_convecting_surface
esurf
esln,s
esel,r,ename,,surf152

3. Apply your boundary condition:
sfe,,,conv,1,%convection_table%
allsel

Mind you, I didn't check the above code, so you might want to spend some time in the Ansys Command Reference. Also be sure to check the KEYOPTs and real constants on your SURF152 elements.

//signed//
Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated
Athens, Ohio
--
http://engineeringliberty.wordpress.com

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