Question

Experimental results for heat transfer over a flat plate with an extremely rough surface were found to be correlated by an expression of the form: Nux​=.043Rex0.9Pr1/3. Explain the correlation and its significance.

Answer 1

The given correlation expression Nux​=.043Rex0.9Pr1/3 represents how various factors affect the heat transfer rate over a rough flat plate.

Step-by-step explanation:

The given correlation expression for heat transfer over a flat plate with an extremely rough surface is Nux​=.043Rex0.9Pr1/3. This correlation is derived from experimental results and represents how various factors affect the heat transfer rate.

In this equation, Nu represents the Nusselt number, Re represents the Reynolds number, and Pr represents the Prandtl number. The equation shows that the Nusselt number depends on the Reynolds number raised to the power of 0.9 and the Prandtl number raised to the power of 1/3.

The Reynolds number represents the ratio of inertial forces to viscous forces, while the Prandtl number represents the ratio of momentum diffusivity to thermal diffusivity. These factors play a role in how heat is transferred over a rough flat plate.