Hydraulic jump
 

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

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

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

Regards.

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

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

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

a graphical photo for free surface of the hydraulic jump
 

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.