Convection Coefficients
A reference for some typical convection coefficients.
Approximate Values of Convection Coefficients
Flow Type | W/(m2⋅K) |
---|---|
Forced convection – low speed flow of air over a surface | 10 |
Forced convection – moderate speed flow of air over a surface | 100 |
Forced convection – moderate speed cross-flow of air over a cylinder | 200 |
Forced convection – moderate flow of water in a pipe | 3000 |
Forced convection – molten metals flowing in tubes | 2000 to 45000 |
Forced convection – oil flowing in tubes | 300 to 1700 |
Forced convection – boiling water in a pipe | 50000 |
Gases in free convection | 5 to 37 |
Water in free convection | 100 to 1200 |
Oil in free convection | 50 to 350 |