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

Aeration Simulation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 17, 2017, 06:03
Default Aeration Simulation
  #1
New Member
 
rafiee.ad's Avatar
 
Arash
Join Date: Mar 2017
Posts: 11
Rep Power: 5
rafiee.ad is on a distinguished road
Hello,

I want to simulate the effects of aeration (using air bubble) on stratified dam reservoirs by using OpenFoam. The simulation is imposed on a 2 dimensional vertical field and the purpose is to obtain the velocity field.

I would be so grateful if you could kindly help me in selecting an appropriate solver in OpenFoam to tackle this problem.

Best regards,
rafiee.ad is offline   Reply With Quote

Old   June 17, 2017, 06:41
Default
  #2
Member
 
Brian Willis
Join Date: Mar 2011
Location: Cape Town, South Africa
Posts: 58
Rep Power: 11
Dipsomaniac is on a distinguished road
Hello Arash

To capture two phase effects in a simulation of a real life dam size problem, I would suggest you look at twoPhaseEulerFoam solver. The other option is interFoam, though I suspect the necessary mesh size will be too large to capture aeration effects which you desire. Though I see it is a 2-D problem, so then interFoam could be an option, though capturing many bubbles becomes very computational intensive. Have a look at the twoPhaseEulerFoam tutorials (bubble column) and the interFoam ones such as the weir Over Flow to determine which will best suite your needs.

Regards,
Brian
Dipsomaniac is offline   Reply With Quote

Old   June 17, 2017, 09:55
Default
  #3
New Member
 
rafiee.ad's Avatar
 
Arash
Join Date: Mar 2017
Posts: 11
Rep Power: 5
rafiee.ad is on a distinguished road
Quote:
Originally Posted by Dipsomaniac View Post
Hello Arash

To capture two phase effects in a simulation of a real life dam size problem, I would suggest you look at twoPhaseEulerFoam solver. The other option is interFoam, though I suspect the necessary mesh size will be too large to capture aeration effects which you desire. Though I see it is a 2-D problem, so then interFoam could be an option, though capturing many bubbles becomes very computational intensive. Have a look at the twoPhaseEulerFoam tutorials (bubble column) and the interFoam ones such as the weir Over Flow to determine which will best suite your needs.

Regards,
Brian


Thank you Brian for your kind help and attention.


Sent from my iPhone using CFD Online Forum mobile app
rafiee.ad is offline   Reply With Quote

Old   August 4, 2017, 14:05
Default
  #4
Member
 
Join Date: Jun 2011
Posts: 80
Rep Power: 11
maalan is on a distinguished road
Quote:
To capture two phase effects in a simulation of a real life dam size problem, I would suggest you look at twoPhaseEulerFoam solver. The other option is interFoam, though I suspect the necessary mesh size will be too large to capture aeration effects which you desire. Though I see it is a 2-D problem, so then interFoam could be an option, though capturing many bubbles becomes very computational intensive. Have a look at the twoPhaseEulerFoam tutorials (bubble column) and the interFoam ones such as the weir Over Flow to determine which will best suite your needs.
Hi Brian,

I have to simulate a 3D aeration tank with a residence time around 2.5 hours. What's the best choice for such as large time scale?

Cheers,
Antonio
maalan is offline   Reply With Quote

Old   August 8, 2017, 07:18
Default
  #5
Senior Member
 
Join Date: Aug 2014
Location: Germany
Posts: 292
Rep Power: 10
BlnPhoenix is on a distinguished road
Quote:
Originally Posted by maalan View Post
Hi Brian,

I have to simulate a 3D aeration tank with a residence time around 2.5 hours. What's the best choice for such as large time scale?

Cheers,
Antonio
TwoPhaseEulerFoam.
BlnPhoenix is offline   Reply With Quote

Old   November 6, 2020, 12:43
Default
  #6
Member
 
Farzad Faraji
Join Date: Nov 2019
Posts: 79
Rep Power: 3
farzadmech is on a distinguished road
Dear Friends
I am simulating aerator in a large tank. Since I am simulating both aerator and large tank at the same time, I want to use the same mesh size all over the domain to avoid different timescales(eg if I use smaller mesh for aerator, my time step will be much smaller). To do so, I have used fvOptions to generate a source of momentum to push the water out of the channels and also suck the water to the aerator(You can see it as a red cylindrical momentum source).

I have done all aforementioned things using pimplefoam(I am just working with water instead of water and air mixture), but my simulation is instable. Now, I have two questions;
1- How can make it stable?

2- Is there any other way I can simulate the outlet of the channels without considering the aerator chamber? If so, what is happening to continuity equation? since mass increases inside the domain without any outlet.

3- Do you have any other suggestion for me?

Thanks,
Farzad
Attached Images
File Type: jpg photo_2020-11-06_15-00-28.jpg (33.8 KB, 6 views)
farzadmech is offline   Reply With Quote

Reply

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
Surface Source - Fixed Temperature? robtheslob FloEFD, FloWorks & FloTHERM 18 May 12, 2017 03:28
Simulation FPEs - turbulence for transient and steady-state? DaveR OpenFOAM Running, Solving & CFD 5 March 5, 2017 16:06
Waterbell Simulation o.b.m Fluent Multiphase 1 November 5, 2015 06:55
setting up a simulation with multiple interactions phandy OpenFOAM Running, Solving & CFD 1 October 6, 2014 04:16
Continuous vs interrupted simulation sega OpenFOAM Running, Solving & CFD 4 November 3, 2008 15:29


All times are GMT -4. The time now is 10:11.