CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

simpleSprayFoam strange entrainment behaviour

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

LinkBack Thread Tools Search this Thread Display Modes
Old   July 9, 2020, 13:29
Default simpleSprayFoam strange entrainment behaviour
New Member
Nadine Rafagnim
Join Date: Jun 2017
Posts: 1
Rep Power: 0
Nrafagnim is on a distinguished road
Dear all,

I'm simulating the oxygen flow from a nozzle to an open reactor filled with air (23% oxygen and 77% nitrogen). All fluids temperature are 300K, the outlet pressure is 101325 Pa and the velocity reaches about 300 m/s. I'm using simpleSprayFoam with k-omega SST turbulence model and I'm getting a very strange backflow behaviour. We expected that the air would flow towards the central region of the reactor, but it is flowing downwards.

What am I doing wrong? Or is my understanding about the flowfield wrong?

I'm attaching some images from the OpenFOAM simulation (velocity field with velocity vectors and temperature fields) and one from the same simulation using Fluent. My 0 folder is also attached. The simulation ran for 800 iterations and the flow is not significantly changing anymore.
We aim to study the combustion of an ethanol spray, that's why we are using simpleSprayFoam.

Thank you very much!
Attached Images
File Type: jpg Fluent-Velocity.jpg (101.2 KB, 6 views)
File Type: png simpleSprayFoam-Temperature.png (8.2 KB, 4 views)
File Type: png simpleSprayFoam-Velocity.png (53.8 KB, 6 views)
Attached Files
File Type: zip (9.1 KB, 0 views)
Nrafagnim is offline   Reply With Quote


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
Strange behaviour when using compressibleInterFoam with constantAlphaContactAngle TobM OpenFOAM Running, Solving & CFD 2 May 11, 2016 06:34
[sprayFoam] strange spray formation behaviour pbalz OpenFOAM Running, Solving & CFD 0 March 23, 2015 11:41
strange pressure behaviour with symmetricPlane boudary condition - interFoam duongquaphim OpenFOAM Running, Solving & CFD 10 August 20, 2013 14:00
Strange residuals behaviour xxxx Main CFD Forum 1 July 13, 2013 14:40
Strange behaviour when using LienCubicKE and NonlinearKEShih hani OpenFOAM Running, Solving & CFD 20 March 6, 2013 10:06

All times are GMT -4. The time now is 13:31.