[aja1345]

Hi,
As you know, boundary condition of pressure in FLUENT set in form of gauge pressure.
The gauge pressure computes as follows:


Gauge pressure=absolute pressure- operating pressure or reference pressure or atmospheric pressure



Now, in my simulation and in pressure contours, pressure is static pressure. In addition, total pressure is related to static pressure as follows:


total pressure=static pressure+dynamic pressure


In this simulation, there is negative static pressure. Why does this happen? What does this mean? The negative Gauge pressure means that pressure is below atmospheric pressure, But in case of static pressure, what does mean?




I have some other question:


1. How can I relate static pressure (in contours) to gauge pressure (in boundary condition)?
2. Is static pressure equal to gauge pressure? or not? What is difference between them?


I am grateful that guide me in these cases.


Thanks.