|April 21, 2010, 06:23||
error because of UDF or VOF ????
Join Date: Feb 2010
Posts: 4Rep Power: 9
Hi i have used udf for creating a sinusoidal interface between two fluids for initializing the rayleigh taylor instability,
clarifying the situation
Its a rectangular domain in which i have defined two fluids( phases ), first one is acetone and another one is water. Now the high density fluid has been placed above the lower one and their interface has been defined in a sinusoidal pattern to trigger the rayleigh taylor instability
1. As i have used VOF scheme to define multi phase fluids, error is coming ( i.e. after few iterations i am getting a higher frequency wave imposed on the interface because the sinusoidal wave is defined by fine staircase) now how to rectify this error ????
2. I have got some information on the net in which by changing the function it self in udf ( by inserting epsilon in the function...etc) we can remove this imposition of higher frequency wave.... or we can smoothen the sinusoidal wave.... does any body having any idea about this functions.....??????
|Thread||Thread Starter||Forum||Replies||Last Post|
|HELP! adding a mass source to VOF eqn. by UDF???||ROOZBEH||FLUENT||5||December 3, 2016 18:53|
|UDF VOF model on Fluent||baechtel||Fluent UDF and Scheme Programming||7||January 20, 2016 19:13|
|UDF Defining VOF Free Surface at Outlet||Alex||Fluent UDF and Scheme Programming||13||August 8, 2012 16:50|
|UDF to read data from a file for VOF model||Pablo||FLUENT||0||October 23, 2008 07:02|
|writing UDF for modelig mass transfer for VOF||ardalan soleymani||FLUENT||0||July 11, 2007 01:09|