Module 3: Transport phenomena in furnaces
  Lecture 30: Refractory design calculations
 

Exercise -5

Find the relationship between  for free convection heat transfer and
and characteristic length.
 
 
  


Properties of air

Film temperature K

Pr

Pr kg/m3

 

400

0.689

0.8826

2.286

0.03365

450

0.683

0.7833

2.484

0.03707

600

0.680

0.5879

3.018

0.04659