|June 23, 2014, 16:22||
Venturi pressure not being conserved!
Join Date: Jan 2014
Posts: 3Rep Power: 5
I am currently validating Bernoulli' principle in a venture. There are no pressure inlets on the throat / neck of the venture (just an inlet and an outlet).
I am trying to validate the principle first (higher pressure > lower velocity and vice versa).
The problemI have at the moment is that the pressure does not appear to be conserved. It should be noted that I am viewing the static pressure from a 'line' I have drawn that runs through the centre of the inlet through to the outlet.
When I view the static pressure on the XY plot I get a flat line reading 'ZERO' Pascal.
If I view the velocity magnitude from the wall of the venture, a good increase / decrease can be seen (as to be expected).
However I am unable to get the same for the pressure reading (regardless of what surfaces the plot comes from.
I have tried decreasing the velocity (to reduce losses), tried an outflow for the outlet, various schemes, changed relaxation factors but to no avail!!
Solver: pressure based
Velocity formulation: Absolute:
Turbulence model: energy equation off, K-e, enhanced wall treatment, all other settings are default
Material: water / liquid (Ansys library)
Boundary Conditions: inlet (velocity inlet), outlet (pressure outlet), Wall (stationary wall)
Pressure: all gauge pressures are set to zero, the operating pressure is set to 101,325 Pa
Any help on this would be highly appreciated
|Thread||Thread Starter||Forum||Replies||Last Post|
|Calculation of the Governing Equations||Mihail||CFX||7||September 7, 2014 06:27|
|Unsteady pressure differential between inlet and outlet of the pipe for single phase||joshi20h||FLUENT||0||September 26, 2012 12:41|
|How to get the total pressure in the UDF?||zgzhai||Fluent UDF and Scheme Programming||2||September 12, 2012 06:15|
|Difference between pressure, absolute pressure and Total Pressure||shaswat||CFX||1||September 6, 2012 06:12|
|Setup/monitor points of pressure and force coefficients||siw||CFX||3||October 22, 2010 06:07|