[Bishal]

While applying the pressure boundary condition, I understand that the “total pressure = gauge pressure + operating pressure (or reference pressure)” but the concepts in the ANSYS solver like Gauge Total Pressure and Supersonic/Initial Gauge Pressure seems a bit confusing to me.

To clear my doubt on this, for instance, if I keep Gauge Total pressure = 100000 Pa and Operating pressure as default 101325 Pa, what is my pressure in the section P1 (Shaded in Red) in the image below?
#1. Is it the sum (101325 + 100000 = 201325 Pa)?

#2. If I want to get P1= zero, How would I do it? Is it by putting zero in Operating Pressure, Gauge Total Pressure, and Supersonic/Initial Gauge Pressure?

I have given pressure inlet boundary conditions for P1.