[adsl17754]

Hi all,

I plan to simulate a multiphase problem by FLUENT13.0, in order to validate the CLSVOF (VOF coupled with Level Set) method in it.
As it is a case for validation, the velocity field is already known, so I wanted to set whole velocity field as known by "profile", just letting FLUENT to capture the interface. The problem was FLUENT read the profile successfully, but velocity field changed after initialization... I have been stuck by that for a long time...
I wonder if "profile" is only available for "inlet" type boundary conditions, i.e I can set velocity or pressure inlet by profile, but not the whole calculation domain (default interior), am I right? Thanks in advance~

Regards adsl17754

[Sherlock_1812]

Hi,

Were you able to set the internal velocity field to profile? Did you overcome this issue?

[adsl17754]

Hi Srivaths,

I later solved this problem in a tricky way:

1. Use Custom Field Function to specify the desired velocity distribution.

2. Patch the custom field function to the domain as the initial condition.

3. Disable 'flow' equation in solution control panel, so that FLUENT won't solve the governing equation for flow.

By using this method, the velocity distribution can remain the same as the initial settings. However, this method won't help if the desired velocity distribution varies with time.

Regards
Hua

[Sherlock_1812]

Thank you for your reply!
I needn't solve the flow in my case, so I guess it should work.

The initial velocity field in my case is discrete data in a file format. Can custom field function support that?

[adsl17754]

Hi Srivaths,

As far as I'm concerned, Custom Field Function only supports function types of input, sorry that I have no idea about how to handle discrete data directly.

Hua

[Sufyan]

Originally Posted by adsl17754

Hi all,

I plan to simulate a multiphase problem by FLUENT13.0, in order to validate the CLSVOF (VOF coupled with Level Set) method in it.
As it is a case for validation, the velocity field is already known, so I wanted to set whole velocity field as known by "profile", just letting FLUENT to capture the interface. The problem was FLUENT read the profile successfully, but velocity field changed after initialization... I have been stuck by that for a long time...
I wonder if "profile" is only available for "inlet" type boundary conditions, i.e I can set velocity or pressure inlet by profile, but not the whole calculation domain (default interior), am I right? Thanks in advance~

Regards adsl17754

Sorry, I know its not very relevant but reading your post I believe you can help in initializing the level-set field in fluent.

I setup volume fraction correctly but i dont know how to set up level-set function initially.