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-   -   How to plot pressure drop with Periodic BC? (http://www.cfd-online.com/Forums/fluent/63782-how-plot-pressure-drop-periodic-bc.html)

 bigfans April 20, 2009 01:23

How to plot pressure drop with Periodic BC?

Anybody can help me to plot the contour of pressure drop of a system with periodic boundary conditions?

Although I can read the pressure drop gradient from Monitor window, the contour of pressure drop I plotted is totally periodic, which is only the periodic part of total pressure drop as discribed by Fluent Mannual. So how to plot the real pressure drop field in Fluent?

Thanks!

 -mAx- April 20, 2009 03:35

If you mean, you want to display all the domain, then go to display/view and there is a panel specific for periodic repeats on the right
;)

 bigfans April 20, 2009 10:33

I just want to visualize the real pressure field of the computational domain. Since there must be pressure drop from inlet and outlet, the real pressure field should not be repeated from inlet and outlet, as shown in Fluent.

By the way, I monitored the pressure gradient (pa/m) through the Monitor/statistics as suggested by Fluent mannual, but why this value is different from the Monitor/surface/area-weighted average value (pa) divided by the length between periodic inlet and outlet (m)? Since I set periodic BC for inlet and outlet, there is only entity to select in area-weighted average, so is this average value the pressure drop between inlet and outlet?

Appreciate all suggestions!

 zjbwow April 20, 2009 10:59

hi max

I've met similar problems in my work.

I want to define a point so that I can trace its pressure change but failed cause the command to define a point can only work in 2D model.

any suggestions for the 3D model ?

thx

 -mAx- April 20, 2009 11:17

*bigfans: post a picture of your issue

 zjbwow April 21, 2009 00:13

Quote:
 Originally Posted by -mAx- (Post 213536) *bigfans: post a picture of your issue *zjbwow: post a new thread and explain your issue

gooooooooooooot it.

 spk August 7, 2009 07:48

Hi guys,

I try the second tutorial in Fluent (Modeling Periodic FLow and Heat Transfer). Can i plot the real contour of pressure field? :confused:

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