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Fluent VOF Volume of Fluid Realistic Solution Problem |
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June 3, 2009, 08:04 |
Fluent VOF Volume of Fluid Realistic Solution Problem
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#1 |
New Member
Join Date: Jun 2009
Posts: 2
Rep Power: 0 |
Hello all, this is my first post, I hope anybody can help me here.
I want to model a full fuel tank and the fuel movement in a wing, but before that I wanted to learn the aspects of VOF and real-time animation of it. I have constructed a simple tank model. In it, I have put the water volume in an oblique angle in the bottom part of the tank. Then I have defined the gravity which is -9.8 m/s2 in Z direction. From start, with gravity, the water should move in the tank and settle down a little bit. Using VOF model and with time-step 0.05 secs, I had 1200 iterations and 1200 .dat files to construct the animation. Since time-step is 0.05 secs, 1200 iterations make 60 secs with 20 solutions (frames) per second. Then I used TecPlot to construct the animation movie, telling it that "you should use 20 solutions (.dat files) to construct 1 second of animation" With these settings I had 60 sec animation movie. But it does not seem realistic. The flow is so sluggish like it is not water, like it is a lot more thicker fluid. When I speed up the movie like 60 frames per second, it is more realistic. But then the reason why I make this animation comes to my mind. I should determine the exact points in animation that can be trouble for the design. I could not trust the computation of Fluent. Do you have any similar experience or suggestions regarding this? Please correct me if I am wrong: since time-step is 0.05 sec, 20 steps make 1 sec. I should use 20 frames (.dat files) to construct 1 sec of animation. 1200 steps (.dat files) make 1200 frames and from 20 frames per second I should have a realistic 60 secs movie, which I did not. Regards |
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June 12, 2009, 16:30 |
fuel tank slashing
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#2 |
New Member
sadrooz
Join Date: Apr 2009
Posts: 12
Rep Power: 17 |
this may be useful .
http://rapidshare.com/files/233767574/tank-sloshing.pdf.html http://dl.free.fr/getfile.pl?file=/MB3v98CX *fuel tank sloshing* |
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June 12, 2009, 16:40 |
fuel tank slashing
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#3 |
New Member
sadrooz
Join Date: Apr 2009
Posts: 12
Rep Power: 17 |
this might be useful
http://rapidshare.com/files/233767574/tank-sloshing.pdf.html http://dl.free.fr/getfile.pl?file=/MB3v98CX *fuel tank sloshing* |
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June 21, 2009, 08:04 |
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#4 |
New Member
Join Date: Jun 2009
Posts: 2
Rep Power: 0 |
Thank you so much! I will look into them in detail.
That was the example I have always faced into when I made a google search. Thanks a lot! |
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Tags |
animation, real-time, time-step, vof, volume of fluid |
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