×
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

SF command (Electro-Thermal Analysis)

SF command (Electro-Thermal Analysis)

SF command (Electro-Thermal Analysis)

(OP)
Hi,
i'm trying to solve a problem like http://www.kxcad.net/ansys/ANSYS/ansyshelp/coustrutherelecexamp.html (Electro-Thermal Microactuator Analysis)but i don't understand how i must use sf command:
asel,s,area,,1
nsla,s,1 ! Thin arm and flexure
nsel,r,loc,x,d8,d8+d4+d5-d6
nsel,r,loc,y,0,d1
sf,all,CONV,-5,Tblk
nsla,s,1
nsel,r,loc,x,d8,d8+d4
nsel,r,loc,y,-(d3+d7),-d7
sf,all,CONV,-5,Tblk
mpdata,HF,5,1,22.4,69.3,76.1,80.5,83.7,86.0
mpdata,HF,5,7,87.5
sf,all,CONV,-5,Tblk
If Lab = CONV, VALUE is typically the film coefficient and VALUE2 (below) is typically the bulk temperature. If VALUE = -N, the film coefficient may be a function of temperature and is determined from the HF property table for material N [MP]. The temperature used to evaluate the film coefficient is usually the average between the bulk and wall temperatures, but may be user-defined for some elements.
How can i calculate HF coefficients?
Best regards!!!

RE: SF command (Electro-Thermal Analysis)

You don't need to calculate what's the film coefficient value, since it's interpolated from the temperature dependent HF table that's defined.

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