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March 25, 2011, 12:45 |
Problem with initial conditions
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#1 |
New Member
Jaskirat
Join Date: Mar 2011
Posts: 3
Rep Power: 15 |
Hi!
I am new to CFD and am using CFX 12 (Ansys 12). I am simulating the flow in an intake manifold. The inlet and outlet boundary conditions have been defined by their mass flow rates. I first ran a steady state simulation with the boundary conditions at t=0. Using the steady state results file as the initial condition a transient simulation was run. The transient boundary conditions have been defined wrt time using the 'User Function' option. The problem is that my results are not as expected. During post processing the velocity contour is similar to the initial conditions profile. But the pressure is uniform throughout the geometry (not at all similar to the initial conditions). What could be causing this and how do I correct it? Thanks! |
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March 25, 2011, 13:31 |
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#2 |
New Member
Kooky
Join Date: Mar 2011
Location: Thailand
Posts: 20
Rep Power: 15 |
Can you post the picture?
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March 25, 2011, 13:58 |
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#3 |
New Member
Jaskirat
Join Date: Mar 2011
Posts: 3
Rep Power: 15 |
I ran the simulation for 2 timesteps... At the 2nd timestep:
This is the velocity profile... This is the pressure profile... The pressure should also depend on the velocity. Why am I getting such results? Thanks! |
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March 26, 2011, 04:42 |
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#4 |
New Member
Jaskirat
Join Date: Mar 2011
Posts: 3
Rep Power: 15 |
Hey! I got it as soon as I posted the picture... The units are wrong (200m!!! :/ )
Thanks! |
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Tags |
post processing, transient |
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