Question: Compute analysis of turbulent flow in a circular tube with t0 = const and constant fluid properties: Use a mixing-length turbulence model with the Van Driest damping function and the variable turbulent Prandtl number model to calculate the flow in a tube at Pr = 0.7 and for Reynolds numbers 30,000 and 150,000, from the tube entrance to a location where the Nusselt number becomes constant. Compare the results with the constant heat-flux boundary-condition results. Examine a temperature profile at the thermally fully developed state to evaluate the thermal law of the wall. Feel free to investigate any other attribute of the tube flow. You can choose how to set up the problem in terms of a suitable choice of dimensions and fluid properties (constant). For the initial conditions at the and constant tube entrance use a flat velocity and temperature profiles.