p8.137_solution - FLOWLAB SOLUTION 8.137 Use the FlowLab...

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FLOWLAB SOLUTION 8.137 Use the FlowLab template pipe_el to investigate the flow field in the entrance length for pipe flow. Set the pipe geometry to a diameter of D = 0.1 m and length of l =  20 m. Use the default air properties for the fluid and set the grid to medium resolution. Conduct a parametric study to investigate how the Reynolds number affects the entrance length, l e , for pipe flow. By varying the inlet velocity, U , obtain flow simulations for Re = 200, 400, 800, and 1000. Plot the wall friction factor distribution along the pipe and determine the friction factor, f , for the fully-developed region. Compare your friction factor values to the theoretical values, f = 64/Re. Problem Setup After setting up the geometry according to the problem statement, the physics were set as shown in the snapshot below. The flow was set to laminar, the heat transfer turned off, and the boundary condition adjusted to give a Re = 200. The grid resolution was set to medium in FlowLab and a sample portion is shown below. For all of the simulations, the convergence limit was set to 1x10
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p8.137_solution - FLOWLAB SOLUTION 8.137 Use the FlowLab...

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