1. Appendix A

2. Exercise: Planar Couette Flow
Description
Wall-driven flow between infinite parallel plates, separated by a distance H. Upper horizontal wall moves at constant velocity, Vwall, while lower horizontal wall is fixed. Left and right vertical boundaries are periodic.
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Appendix A-2

3. Exercise (continued) : Planar Couette Flow
Assumption
Steady-state
Incompressible
VY = VZ = 0
VX = VX(Y) only
Pressure field is constant
No body forces
Fluid properties are constant
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Appendix A-3

4. Exercise: Backward Facing Step
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Appendix A-4

5. Exercise (continued) : Backward Facing Step
Input File:
Step51
Data:
Armaly, et. al., “Experimental and Theoretical Investigation of Backward Facing Step Flow", Journal of Fluid Mechanics (1983), vol. 127, pp
Inlet length:
2.5 (can be varied by the user)
Outlet length:
18 (can be varied by the user)
Outlet Condition:
P = 0 use density = 1.0
viscosity = .001
Hydraulic diameter Dh = 2(.52) = 1.04
Choose Reynolds Number between 200 and 1000:
Watch for the length of the recirculation region and secondary recirculation regions.
How much are results affected by the inlet velocity profile?
How can the choice of the outlet condition be verified?
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Appendix A-5

6. Exercise: Tube Bundle Flow
Description:
Turbulent cross-flow over a bundle of circular tubes. Top and bottom horizontal boundaries are planes of symmetry
Define all key points in terms of parameters:
Create an ALL-QUAD mesh (requires concatenations just before meshing). Concentrate nodes towards tube walls:
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Appendix A-6

7. Exercise: Tube Bundle Flow Concatenated Line
Assumptions
Steady-state
Incompressible
Turbulent
Fluid properties are constant
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Appendix A-7

8. Exercise: Jet Impingement Heat Exchanger Flow
Description
In this device, orifice plates are separated by spacer plates in a stack arrangement, with consecutive plates having an offset hole pattern. Multiple jets of coolant fluid impinge on conductive surfaces to maximize heat transfer. The plate stack is metalluragically bonded together to minimize conductive resistance. Flow is to be modeled in the quarter-symmetry section shown.
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Appendix A-8

9. Exercise: Jet Impingement Heat Exchanger Flow Symmetry Section
Construct flowfield using top-down techniques.
Generate the 12 map-meshable volumes shown below.
(The file jetimp.inp can be used to create this geometry.)
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Appendix A-9

10. Map-Meshable Volumes
Set ESIZE = 0.2 and map mesh with FLUID142 elements.
The jet Reynolds number is 105.
Assumptions
Steady-state
Incompressible
Turbulent
Fluid properties are constant
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Appendix A-10

11. Exercise: Fan Model Dimensions in inches — Fluid is air.
Refer to Elements manual documentation to apply real constant data for fan.
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Appendix A-11

12. Exercise: Counter Current Heat Exchanger
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Appendix A-12