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


Thermal Flow in Ceramic Material

Thermal Flow in Ceramic Material

Thermal Flow in Ceramic Material

Hello there fellow Eng-tips people,

I am doing design of Ceramic Housing that is exposed to Conduction (Oven Grill).
I need some help on how to compute the inner temperature and time before the inner surface reaches the same temperature as its outer wall

Reason is, I want to get the appropriate thickness of Ceramic that can maintain a good internal temperature in a given cooking time.

Thanks for the help!

RE: Thermal Flow in Ceramic Material

An oven grill seems like it would be exposed to conduction, convection and radiation heat transfer modes. To not include all modes of heat transfer seems like an oversimplification. Also, what happens when the grill gets dirty? Does it exhibit the same thermal behavior? The mismatch of thermal expansion properties between ceramic and substrate may have some bearing on the problem also.

RE: Thermal Flow in Ceramic Material

Yes, there are several modes but I will like to concentrate more on the Convection (sorry, not Conduction) at this time.
Will it be Fourier's law or another Heat Transfer equation?
I need it to be transient so time is essential to determine the temperature
Can you advise on how to get the right computation.

RE: Thermal Flow in Ceramic Material

This is a standard conduction inside-convection outside problem. You just use the correct material properties (conductivity, heat capacity). And if the geometry is that of a slab that can be assumed as being infinite, there must be an analytical (one dimensional) solution.

http://www.xcalcs.com : Online engineering calculations
https://www.megamag.it : Magnetic brakes and launchers for fun rides
https://www.levitans.com : Air bearing pads

RE: Thermal Flow in Ceramic Material

Based on your initial assumption of convection on the surface of the ceramic insulation, first assume a T ambient and Hc to be constant values and then develop your heat transfer equations for unsteady state. Such equations are pretty well detailed in any fundamental heat transfer book.

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!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close