[The King]

Hi,

I'm trying to simulate a hydraulic jump. Using VOF model, turbulent. Geometry is easy, slope of 5 degrees and a obstruction on the bottom. The water level before the opstruction is high, a little higher than the obstruction. Behind the obstruction, the water level is low and the velocity is much higher. But now hydraulic jump, the water level stays low.
If I do experiments, I see a hydraulic jump. In my setup, Fr>1 andRe >10000. I use wall functions in a 2D geometry.

Any idea wat I'm doing wrong? Is it possible to model hydraulic jumps in 2D or do I missed some physical understanding? Is there someone trying this before in OpenFoam? I have seen some fluent 2D calculations whit a hydraulic jump.

Thank you!

Arnout

[santiagomarquezd]

If you can read spanish, here it's that you are looking for:

http://www.amcaonline.org.ar/ojs/ind...view/2826/2763

Regards.

[The King]

Hi!

Thabo you. My case is different from the one in the article, I'm looking ar a jump behind a obstacle on the bottom. Let's see it as a river with a stone in it.
Going to try it with fluent now, wil keep Cfd online updated!

Any other hints are still welcome!!

Arnout

[niravtm007]

hii king can you please help me set up a geometry and can you tell me what results you obtaned using fluent, i'm also trying to simulate a hydraulic jump using fluent. do let me know what conditions you applied

[mgdenno]

It should work in 2d. If you post your case I will take a look at it.

[luccy]

hey OpenFOAM's guys
I need a graphical figure of the free surface profile of the hydraulic jump with by Interfoam solver in a rectangular channel.

(a time-averaged volume fraction obtained in the jump
(mean alpha in field average)+ isocontour volume fraction =0.5)

Can someone send me?

Because the jumps I simulate have a strange area which I have shown in the figure.
thank you.