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-   -   VOF problem postprocessing display 3D flow profile (http://www.cfd-online.com/Forums/fluent/34148-vof-problem-postprocessing-display-3d-flow-profile.html)

Saturn July 8, 2004 10:52

VOF problem postprocessing display 3D flow profile
 
Hi! I was using VOF model to simulate the water flow in 3D channel. But I could not show the 3D flow profile (like wave).

How should I set the display the 3D wave profile?

Thanks!!

chakaltaya July 9, 2004 08:41

Re: VOF problem postprocessing display 3D flow pro
 
I believe I had a similar question as yours. Try creating Iso-Surface with vof=0.5. For further detail, refer to my posting in this forum under the title "visualizing waves around ship"

Ataki July 9, 2004 16:39

Re: VOF problem postprocessing display 3D flow pro
 
Hallo, you can see the contours of VOF of water between min=0.5 and max=1 by deactiving the auto scale of vof. best regards

Boris July 13, 2004 05:57

Re: VOF problem postprocessing display 3D flow pro
 
Hi, Chakaltaya

How do you manage to model a planing craft using Fluent? The hull's position changes with time. How do you define the hull position? How about the results?

Thank you for any reply.


chakaltaya July 14, 2004 00:58

Re: VOF problem postprocessing display 3D flow pro
 
Hello Boris,

It would be ideal if I could do the dynamic simulation as you described, but currently, the model I'm working on has the hull fixed in space. In fact, I have a 5- meter-long-1-meter-wide column tilted 5 degrees from horizontal position and small poriton of it is immersed into the water. Air and water are running at 13.89 m/sec. I'm trying various columns with different cross-sections to simulate different planning hull.

There might be a way to model a floating body in Fluent. It's just that I don't know how to do it at the moment. If someone can help me on this, I would greatly appreciate.

As for the results, I'm still trying to make the solution convergent. The residuals diverge depending on the shape of the hull. I managed to run a calculation successfully on a V shaped hull but round shape one diverged. Currently, I'm using a laminar model but I intend to try a turbulent model as well (e.g. Spalart-Almaras)


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