## Fluids

#### Pressure Inlet Boundary Conditions for Fluent?

• skdubey
Subscriber

Dear Friends,

I am trying to understand the "Pressure Inlet" condition on my convergence solution: I have Buyoncy Driven Flow problem:

I have fluid which is at the Static Pressure (static):101325Pa, which I input into (BC) using the Supersonic/Initial Gauge Pressure (Pa): 101325. and outlet pressure is 95000 Pa

I am not sure what to put in the Gauge Total Pressure: manual suggested it should be stagnant pressure= static pressure + dynamic pressure. but for the dynamic pressure, I should have the mean velocity of the fluid. In my application, I do not have any information about the mean velocity. Imp: Do I need to assume mean velocity in the dynamic pressure?, for example, if we have water, Density: 1000kg/m3 and Velocity: 5m/s (assume) gives me Dynamic Pressure of 12500 Pa then I get the Stagnant Press=101325+12500=113825Pa? I get the following graph for the residual? Is this correct?

A. Pressure Inlet Boundary Condition with 113825Pa.

• Karthik R