[saisanthoshm88]

Hello every body,

I'm a novice user to ICEM CFD and CFX. I was trying to simulate in ANSYS CFX a hvac problem. The domain considered was a simple rectangular room with an inlet and outlet vents. However, there is a human being, a LCD monitor and a CPU with in the room. The monitor and the CPU being the heat sources in the room. It was intended to maintain an atmospheric pressure inside the room and a pressure lower than the atmospheric pressure at the outlet vents, a velocity boundary condition is used at the inlet. Accordingly I’ve specified in ANSYS CFX Pre, a reference pressure of 1 Atm in the basic settings for the domain and a relative static pressure of -0.7 Atm ( thinking that its absolute value will be 1-0.7 = 0.3 Atm ) at the outlet vents and a velocity of 2 m/s at the inlet. Material used is Air at 25 C.

The problem is that when I post process the results, the total pressure contour plotted looks as if the pressure inside the room is in the range of -0.7 Atm and not around 1 Atm as expected, why is it so? Can some one suggest a better approach in doing this.