Simulating water movement up and down in a tank

walte · September 21, 2018, 16:12

Hi all,

I am a new Fluent user and I am trying to simulate fluctuation water movement up and down, similar to that of a tank draining then refilling. The water movement is not cyclical and therefore cannot be simulated with a function. Is there a way to use dynamic mesh to add layers and remove layers over time with an array of water level numbers? If so how would I write this udf?

The second option would be to include an air layer above and change the pressure (at an inlet at the bottom that is already needed in my model) to shift the water level. If I do it this way I'm not sure how to add an energy source just to the water phase in the VOF model. On the graphic interface it only allows hooking an energy source to the mixture.

Any suggestions would be helpful!

PrfromTexas · October 19, 2018, 14:38

Hello,

While you incorporate layer 0, you will "turn on" all of gathering layer 0's sublayers. On the off chance that you take a gander at the layer.visibleLayers cluster you should see esteems [0,2,3] for the obvious layers. The visibleLayers cluster should be set to: [3]. It would be ideal if you take note of that layer 0 is absent, despite the fact that it is obvious. There's a good guide on Dynamic Mesh discrimination.

The way to making it work: setting perceivability for sublayers, just incorporate "leaf" layerids. The sole exemption to this, is obviously, in case you're turning "on" a gathering layer, in which case you need to incorporate the gathering id number in the exhibit.

September 21, 2018, 16:12	Simulating water movement up and down in a tank	#1
walte New Member Join Date: Sep 2018 Posts: 1 Rep Power: 0	Hi all, I am a new Fluent user and I am trying to simulate fluctuation water movement up and down, similar to that of a tank draining then refilling. The water movement is not cyclical and therefore cannot be simulated with a function. Is there a way to use dynamic mesh to add layers and remove layers over time with an array of water level numbers? If so how would I write this udf? The second option would be to include an air layer above and change the pressure (at an inlet at the bottom that is already needed in my model) to shift the water level. If I do it this way I'm not sure how to add an energy source just to the water phase in the VOF model. On the graphic interface it only allows hooking an energy source to the mixture. Any suggestions would be helpful!

October 19, 2018, 14:38		#2
PrfromTexas New Member Terry Lewis Join Date: Oct 2018 Posts: 1 Rep Power: 0	Hello, While you incorporate layer 0, you will "turn on" all of gathering layer 0's sublayers. On the off chance that you take a gander at the layer.visibleLayers cluster you should see esteems [0,2,3] for the obvious layers. The visibleLayers cluster should be set to: [3]. It would be ideal if you take note of that layer 0 is absent, despite the fact that it is obvious. There's a good guide on Dynamic Mesh discrimination. The way to making it work: setting perceivability for sublayers, just incorporate "leaf" layerids. The sole exemption to this, is obviously, in case you're turning "on" a gathering layer, in which case you need to incorporate the gathering id number in the exhibit.