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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Doubt on gravity effect at pipe oulet in Fluent › Reply To: Doubt on gravity effect at pipe oulet in Fluent

July 24, 2024 at 5:39 pm
Alex Chiella
Subscriber

The backflow is pure air. The operating density for the domain is 0, were you asking about some pressure outlet specific density that I'm not aware of?

If I got what you mean about initialising the domain from the outflow, the issue is that the relevant value is the velocity at pipe outlet, which in my CFD domain is just an internal surface. The cylindrical exit region is not suitable for initialisation, because "pull" behaviour (via a radial velocity outlet) is inherently different from "push" (flow with a given inertia through a pipe opening into the atmosphere). But I might have entirely misunderstood your suggestion here!