Heat Transfer

  • Thread starter lazypast
  • Start date
  • #1
85
0
HI

when dealing with natural convection, we use grashof's number. suppose we have a heated plate of temperature Tp. and heat being transferred to surrounding air by convection, air of temp Ta.

So film temp is Tf = 0.5(Tp + Ta)

If grashofs numbers, [tex]Gr = \frac { \beta gL^3 \delta T}{\nu^2}[/tex]

im wondering what [tex]\delta T[/tex] and what [tex]\beta[/tex] we use.

thanks
 

Answers and Replies

Related Threads on Heat Transfer

  • Last Post
Replies
3
Views
9K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
3
Views
750
  • Last Post
Replies
15
Views
2K
  • Last Post
Replies
3
Views
745
  • Last Post
Replies
2
Views
724
Top