|
[Sponsors] |
February 8, 2007, 14:13 |
determination of jet front
|
#1 |
Guest
Posts: n/a
|
I am simulating one liquid injecting into another liquid in a tank and trying to determine the transient jet front and shape. I noticed there are different jet length when I use different values of volume fraction in the jet contour plot. Same thing happens while using different jet velocities for determining the jet boundary. This led me to think about the criteria for determining the jet shape in previous jet experiments. How to match the test data with CFD?
Thanks! |
|
February 8, 2007, 14:30 |
Re: determination of jet front
|
#2 |
Guest
Posts: n/a
|
Well, how does your test data determine it?
|
|
February 8, 2007, 15:10 |
Re: determination of jet front
|
#3 |
Guest
Posts: n/a
|
I am using previous test results, in which they used a high-speed camera to visualize the dyed jet with color. Obviously, the color will disappear as the concentration of dye or dyed liquid decreases. In CFD, I modeled the injection as dispersed fluid and process the results using the volume fraction of the injection fluid. Thanks!
|
|
February 8, 2007, 16:43 |
Re: determination of jet front
|
#4 |
Guest
Posts: n/a
|
Dispersed fluid!? Thats your problem right there.
Use a single phase flow with a non-diffusing scalar to tag the jet flow. |
|
February 11, 2007, 11:09 |
Re: determination of jet front
|
#5 |
Guest
Posts: n/a
|
Thanks Joe.
I tried the scalar approach before and the transient jet length I got is much less than experimental data, almost half of the measured jet length. Then I switched to dispersed fluid approach. Do you have any suggestions what parameters in the scalar approach I can adjust to increase the predicted jet length to match the test data. Thank you so much for help! |
|
February 11, 2007, 13:01 |
Re: determination of jet front
|
#6 |
Guest
Posts: n/a
|
How about you provide proper information such as fluid type, Reynolds number, meshes, ... Then you can get meaningfull input.
|
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Jet fan and Tunnel simulation | ahlo7 | CFX | 9 | November 13, 2019 05:54 |
2D Plane Jet Fluent Solution | doug | Main CFD Forum | 11 | February 4, 2019 10:34 |
method to determine jet front | Fred | Main CFD Forum | 0 | February 8, 2007 14:15 |
Front tracking | Don Hawken | Main CFD Forum | 1 | December 12, 1999 14:29 |
IMPINGING JET ........... HELP!!!!!!!! | Amir Omoumi | Main CFD Forum | 10 | August 30, 1999 23:11 |