2-D-无代写
时间:2024-02-28
CFD Exercise
• Construct a 2-D parallel channel flow using ANSYS CFX.
– Open up a Fluid Flow (CFX) project.
– In Geometry, create a 1 m long channel with 0.1 m width, then
extrude with 0.002 m thickness.
– It should be noted that 2-D simulation in CFX requires one mesh in the
z-direction, which will be further explained later.
CFD Exercise
• In Mesh, insert face sizing and apply to one of the faces of the channel.
• Under Face Sizing, choose element size as the type and insert an element
size of 0.002 m or 2 mm (make sure your z-direction only contains one
mesh).
• Update your mesh.
Your mesh should look like the above
figure
CFD Exercise
• In Setup, Default Domain, you can set up your fluid type
based on the ANSYS CFX library.
– First, activate heat transfer in Fluid Models, select Thermal Energy.
– For turbulence, choose Laminar as your option.
– Go to Basic Settings, under the material library, you can “Air Ideal Gas”
and “Water Ideal Gas” under the category Calorically Perfect Ideal
Gases.
CFD Exercise
• Set up your boundary conditions in Setup:
– For inlet, use a 0.02 ms-1 normal speed flow with a static temperature of 300 K.
– For outlet, use average static pressure with 0 Pa relative pressure.
– Walls should be applied at both faces facing (+y) and (-y) directions with 330 K wall
temperature.
– Symmetry should be applied at both faces facing (+z) and (-z) directions.
– Finally, in Solver Control, put Max. Iteration as 100 and residual target as RMS for 1e-10.

Inlet
Outlet
Symmetry (+z)
Symmetry (-z)
Wall (+y)
Wall (-y)
CFD Exercise
• After running in Solutions, you can view in Results:
– Create a XY-plane with Z as 0.001 m or 1 mm.
– Create a contour and select locations as your defined plane.
– For air, the velocity and temperature contour results are shown below (i.e. respectively
for left and right figures).
– Repeat the simulation for water, comment on the velocity and temperature profiles.


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