Learning Forum

[Abhemanyu Palaniswamy Chandrasekaran]

Hello,

I want to model a semi infinite fluid domain using ambient elements in SALE mesh. I have created a solid set using SET_SOLID_GENERAL and the mesh control points required. While defining the *BOUNDARY_AMBIENT keyword, is it mandatory to input the Load curves for Internal energy and Volume fraction? 

When the pressure inflow/outflow in the ambient boundaries are unknown, can the LCIDs for internal energy and volume fraction be left blank?

 

[Ian Do]

Hi Abhemanyu,

By default, the space outside the ALE mesh has 0 P definition  (a kind of computational vacuum, right?).

Defining  *BOUNDARY_AMBIENT without load curves default it to zero p anyway. I think this is an added complexity with no advantage and would advise against it. It may or may not run, but i wouldn't do it anyway even if it "runs". It is added cost for no gain, and also potentially a source of instability because we are not sure how the code will take it.

Regards,

Ian Do 

[Abhemanyu Palaniswamy Chandrasekaran]

Hi Ian,

Thanks for the explanation.

Regards

Abhemanyu