[Industrial_CFD]

Hi,

I would like to model the effect of wall condensation within a vessel to assess the pressure change occurring. The fluid dynamics update for ANSYS v14 says that CFX is able to do this, and was presented as new feature. I was going to write some user Fortran and make the walls a mass and energy sink, is there a more elegant way of accomplishing this?

[Industrial_CFD]

I should mention I am trying to avoid modeling the actual mult-iphase flow within the vessel due to serious simulation time constraints. Thanks for everyone's input!

[ghorrocks]

You can define mass and energy sinks with expressions and CCL. No need for fortran.

If you have serious time constraints then I would contact CFX support to get an example simulation using this model.

[Sixkillers]

Version 14 has introduced wall condensation model. For setup you can use library template wall_condensation.ccl situated in ANSYS Inc/v140/CFX/etc/model-templates

[Industrial_CFD]

Thanks a lot for the advice! I will use the template as suggested. I didn't see any explicit mention of it in the manuals, so I was wondering if it was a marketing gimmick.

Cheers

[ghorrocks]

so I was wondering if it was a marketing gimmick

ha ha ha - you mean a complete lie?

There is a lot of functionality in CFX which is not documented. You have to contact CFX support to find out how to get it working. This is not a silly as it sounds - these models are complex with many settings and require careful setup to work properly. Getting support from the people who wrote the software to get these models working is wise.

[Industrial_CFD]

Hi Glenn,

I contacted support and they are looking over my settings....the model ran, but the results were not as expected. Like you said, very complicated model, I will let the experts make sure everything is correct.

Cheers