If Pr>>1 that means heat diffuses very slowly in the medium
whereas Pr<<1 means heat diffuses quickly in the medium.
Values of Pr for some materials:
Liquid metals = 0.004-0.03
Gases = 0.7-1.0
Water = 1.7-13.7
Oils = 50-100,000
If Pr>>1 that means heat diffuses very slowly in the medium
whereas Pr<<1 means heat diffuses quickly in the medium.
Values of Pr for some materials:
Liquid metals = 0.004-0.03
Gases = 0.7-1.0
Water = 1.7-13.7
Oils = 50-100,000