p8.139_solution - FLOWLAB SOLUTION 8.139 Conduct a...

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FLOWLAB SOLUTION 8.139 Conduct a parametric study for fully developed pipe flow by making use of the pipe_fd FlowLab template. Set the pipe geometry with a radius of R = 0.05m and a length of l =  1.0 m and use air at standard conditions. Run CFD simulations for Reynolds numbers of Re = 500, 2000, 4000, and 10,000. What effect does increasing the Reynolds number have on the total friction force on the pipe wall? By examining the calculated friction factors, f , explain the trend of how the friction factor varies as the Reynolds number is increased. Compare your calculated friction factors with the known values and comment on any differences. Problem Setup The Reynolds number was varied through the boundary condition for mass flow rate (kg/ s). Depending on the Reynolds number the Viscous Condition was set to either Laminar or Turbulent, as shown below. When solving a turbulent flow, FlowLab gives you the option of specifying a wall roughness, as shown in the Boundary Condition box. For these simulations, the wall roughness was set to zero. For all simulations, the fine grid option was selected for the mesh density as shown
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This note was uploaded on 03/27/2010 for the course ME 330 taught by Professor All during the Spring '08 term at University of Texas at Austin.

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p8.139_solution - FLOWLAB SOLUTION 8.139 Conduct a...

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