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Significant Reversed Flow at Outflow Problems [ANSYS FLUENT]

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Old   April 17, 2012, 15:38
Default Significant Reversed Flow at Outflow Problems [ANSYS FLUENT]
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Hello,

I'm running a closed domain cardiovascular simulation comprised of 2 mass flow inlet boundary conditions with 5 outflow boundary conditions. When the solution is calculated, the boundary conditions are held correctly but there is a huge amount of reversed flow happening at the boundaries. I have had the solution converge before to what looks like an appropriate flow field but I had to change a boundary condition and re-run the simulation. Now it isn't converging.

I previously got the solution to converge by reducing the relaxation factors and starting with an initial velocity. Any ideas on how to eliminate reversed flow? Any help is appreciated.
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Old   May 15, 2012, 23:50
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For those of you wondering, I think I may have solved my problem by initializing the solution using one of my inlets. As it turns out, initial conditions are important.
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