fluid jet simulation with 1 dimensional equation

 Register Blogs Members List Search Today's Posts Mark Forums Read

 October 8, 2004, 13:37 fluid jet simulation with 1 dimensional equation #1 sangwon Guest   Posts: n/a Hi All: I'm in a computer graphics community and trying to simulate fluid jet. It's not in full 3D space. The axis is fixed, and need to see the change of the thickness of the jet along the axis while I perturb the velocity at the inlet position. The requirement is 1. FAST & STABLE -- it should be realtime 2. need NOT be accurate -- if it 'looks' realistic, that's enough 3. should be able to handle the breakup without much hassle I found a work by Jens Eggers who used 1D fluid equation to simulate drippling faucet. He derived the equation from NS equation in cylindrical coordinate. I actually got the source code from one of the authors, but it is too slow and complicated as a graphics application. Can somebody give me a reference or advice?

 October 8, 2004, 14:46 Re: fluid jet simulation with 1 dimensional equati #2 Junseok Kim Guest   Posts: n/a You may want to the website, put your mouse on the jet figure, then you will see the movie. http://math.uci.edu/~jskim/simulations.html Junseok

 October 8, 2004, 14:51 Re: fluid jet simulation with 1 dimensional equati #3 Junseok Kim Guest   Posts: n/a sorry, I didn't read your post in detail, I missed some the calculation is slow and is not suitable to your case, what I meant is that it is not real time simulation. Junseok

 October 8, 2004, 15:49 Re: fluid jet simulation with 1 dimensional equati #4 sangwon Guest   Posts: n/a But your simulation looks really cool! Did it use full NS solver or simplified 1D solver? Do u think it would be possible to simplify your code somehow to make it very fast? ( again, accuracy doesn't matter much )

 October 8, 2004, 16:31 Re: fluid jet simulation with 1 dimensional equati #5 Junseok Kim Guest   Posts: n/a The numerical code is solving full NS in axisymmetric domain (2D) and for the interface capturing I used phase-field model (Cahn-Hilliard equation), the basic idea is very similar to popular level set method. Jet simulation is complicated process, involving gravity, oscillating inflow velocity, and surface tension effects. I am not sure how fast is fast in your case. The meaning of fastness is relative. Junseok

 October 8, 2004, 16:34 Re: fluid jet simulation with 1 dimensional equati #6 Junseok Kim Guest   Posts: n/a As you may noticed from my simulation result, after pinch-off the droplet has inverted curvature, which is 2D effect, from the 1D you can't get that one because it has multiple solution from 1D point of view. Junseok

 Thread Tools 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 On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Suzzn CFX 21 January 29, 2018 01:58 Mihail CFX 7 September 7, 2014 06:27 ahlo7 CFX 7 March 7, 2012 11:25 alessio.nz OpenFOAM 19 February 8, 2011 08:38 hennie Siemens 1 July 4, 2002 03:21

All times are GMT -4. The time now is 23:19.