# Fluent VOF Volume of Fluid Realistic Solution Problem

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 June 3, 2009, 07:04 Fluent VOF Volume of Fluid Realistic Solution Problem #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

 June 12, 2009, 15:30 fuel tank slashing #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*

 June 12, 2009, 15:40 fuel tank slashing #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*

 June 21, 2009, 07:04 #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!

 Tags animation, real-time, time-step, vof, volume of fluid

 Thread Tools Search this Thread Search this Thread: Advanced Search Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are Off Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post [blockMesh] BlockMesh FOAM warning gaottino OpenFOAM Meshing & Mesh Conversion 7 July 19, 2010 14:11 msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 02:58 Yazid Bindar FLUENT 5 March 6, 2003 03:09 Abhi Main CFD Forum 12 July 8, 2002 09:11 Mohammad Al-Shannag Main CFD Forum 1 July 16, 1999 11:28

All times are GMT -4. The time now is 07:56.

 Contact Us - CFD Online - Privacy Statement - Top