CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM

masterthesis Water/Air spray

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 26, 2014, 07:13
Default masterthesis Water/Air spray
  #1
New Member
 
Join Date: Mar 2014
Posts: 2
Rep Power: 0
tharkus is on a distinguished road
Hello everyone,

I am new in this forum so let me introduce myself very briefly:

My name is Markus and I am a student in Applied Computional Mechanics.
I am almost finished my studies and now I am looking for a master thesis topic.

Therefore I want to simulate the spray of water atomized with air injectors with OpenFoam. In this case there is one water injector in the middle and four surrounding air injector to atomize the water into spray.

I didnīt applied the master thesis since now and want to know if this problem can be solved with OpenFoam in general and your opinion if this is treatable in half a year with only small experiance with OpenFoam. I did some further CFD simulation with NX Flow and Star ccm+ and theory during study, so there is some knowledge about CFD and sprays in general.

For validation I will do some experiments with a partner company, to get sizes of droplets, velocities and geometrical shape of the spray.

Thanks for your help.

Greets
Markus
tharkus is offline   Reply With Quote

Old   March 26, 2014, 11:41
Default
  #2
New Member
 
Join Date: Mar 2009
Location: Sao Jose dos Campos, Brazil
Posts: 29
Rep Power: 17
piccinini is on a distinguished road
Hello, Tharkus.

It is very difficult to model the primary atomization, i.e., the initial breakup of the liquid core into small droplets.

If you measure the outlet conditions in the injector nozzle (droplet diameter, velocity, temperature, etc), you may try OpenFOAM to model the spray evolution from this point on.
piccinini is offline   Reply With Quote

Old   March 26, 2014, 15:37
Default
  #3
Senior Member
 
mturcios777's Avatar
 
Marco A. Turcios
Join Date: Mar 2009
Location: Vancouver, BC, Canada
Posts: 740
Rep Power: 28
mturcios777 will become famous soon enough
Seems like one of the multiphase solvers could do the job. Have a look the multiphase tutorials cases to look at what is capable.
mturcios777 is offline   Reply With Quote

Old   March 27, 2014, 04:40
Default
  #4
New Member
 
Join Date: Mar 2014
Posts: 2
Rep Power: 0
tharkus is on a distinguished road
thx for the first answers.

I heard about that there are different models for first atomization implemented in sprayfoam. I try a closer look at that or maybe change my topic as you said piccinini.

Does anybody has experiance in first atomization modelling of plain jet airblast nozzles?
In fact atomization of plain jet airblast nozzles mainly happens through capillary action ( Rayleigh mode)
tharkus is offline   Reply With Quote

Old   April 16, 2014, 01:38
Default
  #5
New Member
 
Antti Kokko
Join Date: Feb 2012
Posts: 1
Rep Power: 0
amkokko is on a distinguished road
Hi,

maybe this is a late reply, but these seem to be interesting: http://computing.ornl.gov/SC10/docum..._Anne_Dord.pdf, http://www.openfoamworkshop.org/6th_...ord_slides.pdf.

Best Regards, Antti
amkokko is offline   Reply With Quote

Reply

Tags
atomization, openfoam 2.1.x, water spray

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Spray total droplet momentum calculation help tarnsharma AVL FIRE 0 July 19, 2012 08:17
[ANSYS Meshing] Meshing for study on fuel spray carolann ANSYS Meshing & Geometry 0 June 25, 2012 02:59
Spray slows then stops coastal593 OpenFOAM Running, Solving & CFD 6 July 31, 2007 16:14
spray injection mmacrb FLUENT 0 January 10, 2007 04:57
problems with unsteady spray simulation Mathias FLUENT 1 July 20, 2006 16:13


All times are GMT -4. The time now is 21:23.