1 Introduction
2 The wall jet solution for the velocity
3 The wall jet solution for the temperature
4 Experiments
4.1 The experimental set-up
4.2 Determination of the cooling gradient at Tw0
4.3 Laminar gap flow
4.4 Adaptation of Eq. 26 to experimental conditions
5 Experimental results
6 Summary and conclusion
7 List of symbols
a | Heat diffusivity |
---|---|
B | Cylinder circumference |
C | Parameter |
\(f(\eta ){,}f'(\eta )\) | Normalized stream function and velocity |
g (x,m) | Function of x and m |
L | Length of heated wall |
m | Similarity parameter |
Nu | Nusselt number |
Pr | Prandtl number |
\(\dot{q}{,}\dot{Q}\) | Specific and absolute heat flow rate |
Re | Reynolds number |
s | Gap width |
\(T_{\infty }{,}T_{w0}\) | Ambient and wall temperature |
u, v | Velocity components |
\(U_{\infty }\) | Free stream velocity at the flat plate and mean velocity in the gap |
\(x{,}y{,}\eta\) | Coordinates |
\(\nu\) | Kinematic viscosity |
\(\lambda\) | Heat conductivity |
\(\Uptheta\) | Normalized temperature |