p8.135_solution - FLOWLAB SOLUTION 8.135 Use the FlowLab...

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FLOWLAB SOLUTION 8.135 Use the FlowLab template pipe_el to investigate the flow field in the entrance region 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, set the Reynolds number to Re = 400, and set the grid to medium resolution. After running the simulation to convergence, discuss the following concepts concerning the entrance length of the pipe. ( a ) Note the centerline velocity profile as a function of distance along the pipe and explain why its value exhibits a sharp increase in magnitude and why it eventually levels off. ( b ) By plotting velocity vectors, demonstrate the inviscid core in the entrance region. ( c ) Compare the difference in the velocity profiles in the entrance region and the fully- developed region. Problem Setup The pipe geometry was set according to the problem statement shown above. Note that the problem statement specifies a diameter whereas the FlowLab input requires the radius of the pipe. The material properties and boundary conditions were set to produce a
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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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p8.135_solution - FLOWLAB SOLUTION 8.135 Use the FlowLab...

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