[kraku07]

Hi,

I am trying to set up a Fluent VOF multiphase simulation to visualise the effect of sloshing during a seismic event. Until this point setting it up was not an issue, everything worked fine with constant gravity accelerations or even with sinusoidal acceleration - I can see the sloshing in the animation.

What I am interested in is using earthquake ground acceleration data to move the water particles. I know that I need to write a UDF for that. I tried multiple times with DEFINE_SOURCE or DEFINE_ADJUST, however, nothing seem to be working. They compile and load without any issues, the simulation is running, but there is no visible motion in the animation.

I looked through many posts on this forum and I still have no answer. Could anyone provide any advice on my problem and tell whether it is possible at all? What type of UDF would be best to handle such problem?

Many thanks