# Bubble motion in water...help

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

 May 29, 2001, 00:25 Bubble motion in water...help #1 Jazaul Ikhsan Guest   Posts: n/a Hello, I am doing research about bubble flow in water. The bubble motion causes disturbance in water. What is the governing equation of this case ? How do I apply the shear stress term ? Thank you for your answer

 May 29, 2001, 00:57 Re: Bubble motion in water...help #2 Ibrahim Mustafa Guest   Posts: n/a The governing equations are NS. Apply them separately to water and air bubbles and match the boundary conditons to converge

 May 29, 2001, 02:43 Re: Bubble motion in water...help #3 Jazaul Ikhsan Guest   Posts: n/a Your explanation too general for me because, I'm sorry, I'am a beginner in this case. Could you explain in detail, please ? Thanks again for your answer.

 May 29, 2001, 06:05 Re: Bubble motion in water...help #4 John C. Chien Guest   Posts: n/a (1). You have governing equations for the bubble, and governing equations for the water. (2). So, you have conservation laws for the water, the bubble, and the combined system. Conservation laws are mass, momentum and energy conservations.(3). Relatively speaking, you will have flow over the bubble, and it will create flow motions in water. (you will also get flow motion in the bubble.)

 May 29, 2001, 09:55 Re: Bubble motion in water...help #5 Pei-Ying Hsieh Guest   Posts: n/a Navier-Stokes' equation is the governing equations. When in the water phase, use the fluid properties of water (density, viscosity), while in the air phase, use the properties of air. The conditions on the water/air interface should match. So, one of the issues is to track the locations of the interfaces. Several methods have been developed for this: Level Set, VOF (volume-of-fluid), Front tracking...etc. Each has its weakness and strength. So, which one to use depends on the problem you are solving. If the medium of the bubble is not air and the density ratio between the bubble and water (or surrounding fluid) is less than 200, you might want to consider Lattice Boltzmann method. There is no need to track the interface explicitly.

 May 29, 2001, 11:37 Re: Bubble motion in water...help #6 bronze Guest   Posts: n/a There is a book by cliff, grace and weber Bubbles drops and particles Commonly refered to as the "Bubble Bible". I would suggest you start here. It covers everything and more. A very interesting subject

 May 30, 2001, 02:48 Bubble bible #7 Barry Guest   Posts: n/a Hey Bronze Please give us the full reference for the Bubble bible, We are very interested! i.e. authors publishers etc etc Thanx Barry

 May 30, 2001, 10:26 Re: Bubble bible #8 bronze Guest   Posts: n/a R. Clift, J. R. Grace, and M.E. Weber, 1978, Bubbles, Drops, and Particles, Academic Press, NY, ISBN 0-12-176950-X

 May 31, 2001, 01:35 Re: Bubble bible #9 Barry Guest   Posts: n/a Thanx a million Bronze

 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 Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20 Attesz CFX 7 January 5, 2013 04:32 William Palm FLUENT 1 April 20, 2005 10:53 Abhi Main CFD Forum 12 July 8, 2002 09:11 fredius,magige,tanzanian,(e.a) Main CFD Forum 0 January 27, 2002 08:10

All times are GMT -4. The time now is 05:16.