VOF UDF unsteady inlet/outlet

danielvhm · January 28, 2014, 17:36

I would like to implement a simple wave propagating in the domain without making a dynamic mesh. I would like to specify both the free surface elevation and the velocity as a function of time. Fluent only allows me to specify the velocity with a UDF but not the free surface elevation (VOF Open channel). How can I accomplish this? Also, I looked that there is an option for VOF waves. How do I use this to generate a wave?

AdamAL · January 30, 2014, 11:32

Hi Daniel

I can't help you with the UDF. As for the Open Channel Wave BC:

In Models:Multiphase:VOF, enable
Open Channel [√] and
Open Channel Wave BC [√]
Now under boundary conditions, set you inlet zone to Velocity inlet. Edit its settings and enable Open Channel Wave BC, then specify the wave you want under the Multiphase tab.

January 28, 2014, 17:36	VOF UDF unsteady inlet/outlet	#1
danielvhm New Member Daniel Horna Join Date: Jan 2014 Posts: 2 Rep Power: 0	I would like to implement a simple wave propagating in the domain without making a dynamic mesh. I would like to specify both the free surface elevation and the velocity as a function of time. Fluent only allows me to specify the velocity with a UDF but not the free surface elevation (VOF Open channel). How can I accomplish this? Also, I looked that there is an option for VOF waves. How do I use this to generate a wave?

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January 30, 2014, 11:32		#2
AdamAL New Member Adam Læssøe Join Date: Nov 2013 Posts: 29 Rep Power: 13	Hi Daniel I can't help you with the UDF. As for the Open Channel Wave BC: In Models:Multiphase:VOF, enable Open Channel [√] and Open Channel Wave BC [√] Now under boundary conditions, set you inlet zone to Velocity inlet. Edit its settings and enable Open Channel Wave BC, then specify the wave you want under the Multiphase tab.