Surface cooling - Rayleigh, Prandtl and Grashof numbers

Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
Sign up Log in
1 replies · 4K views
Roger44
Messages
79
Reaction score
1
Hello,
I am trying to calculate the surface cooling rate from the sides of a round tin can using Rayleigh, Prandtl and Grashof numbers but I'm getting a ridiculously high result, and I'm hoping someone could run through my numbers to tell me where I'm going wrong.

Posting my question is going to take a bit of time, so could you let me know if you're willing to tackle this one.

Thanks
Roger
 
Engineering news on Phys.org
OK, found it.
I took k of the metal instead of k of air.
Sorry