hw_6 - ME 152A Introduction to Fluid Mechanics Fall 2008 S....

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ME 152A Fall 2008 Introduction to Fluid Mechanics S. Pennathur HW 6 Due Friday, November 21 st at 5pm Use Comsol V3.3 or V3.4 (in the Cad Lab) to investigate a flow below: Poiseuille flow between two infinite parallel plates, where both plates are fixed and the flow is driven by a constant pressure gradient. PART I: Assume: A finite channel that is H = 1 mm high and L = 5 mm long. Assume that the flow enters the channel from the left with a uniform velocity of U = 1 mm/s, and the pressure is p = 0 (gauge) at the exit. Assume that the working fluid is water, with a density of ρ = 1000 kg/m 3 and μ = 0.001 N s/m 2 Find: 1. Plot the mesh. Make sure the mesh sufficiently resolves the flow. 2. Plot the 2-D velocity field throughout the channel. At what point (how far down in the x-direction) does the velocity field converge to fully developed flow as calculated in class? 3. Plot a velocity profile at a down stream cross section of the channel and directly plot it against the analytical velocity profile calculated in class. 4. Plot the pressure field through out the channel. Compare the pressure drop
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hw_6 - ME 152A Introduction to Fluid Mechanics Fall 2008 S....

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