Question

_________ is fixed at one inlet node and pressure correction is set to _________ in that node.

(a) Gauge pressure, one

(b) Absolute pressure, one

(c) Gauge pressure, zero

(d) Absolute pressure, zero

I have been asked this question by my school teacher while I was bunking the class.

This interesting question is from Boundary Conditions in chapter Boundary Conditions of Computational Fluid Dynamics

Answer 1

Correct option is (d) Absolute pressure, zero

For explanation I would say: While calculating, the pressure field does not give absolute pressures. A reference pressure should be set before to resolve this problem. To set a reference pressure, absolute pressure is fixed at inlet node and pressure correction is set to zero there.