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-   -   2D Box dropping into water (https://www.cfd-online.com/Forums/fluent-multiphase/125522-2d-box-dropping-into-water.html)

kailingkk October 27, 2013 09:46

2D Box dropping into water
 
Hi guys,

To better suit the project I am working on, I am trying to build the tutorial of 2D box falling into water from scratch, i.e. create the geometry and mesh file by myself.


However, when I use a UDF with constant acceleration downwards, I get results like this:

http://i8.photobucket.com/albums/a45...027-WA0042.jpg



I have had compiled my own UDF with the tutorial mesh file and it had worked fine thus I do not think it plays a part in creating this phenomenon. (My UDF makes the box drop at -1ms^-2)


Could anybody explain to me why this had occured? Why was there this bending phenomenon in the water and jetting at the left side? Did I miss out any steps when creating my mesh in gambit?

mrji8011 April 9, 2014 19:06

would you please put your UDF and say about your setting? maybe I can help you:)


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