[nirmal_singh]

Can anyone please provide insight to the following information in FloTHERM.

Any help is highly appreciated.

As quoted in user mannual:
"I/9011 - Open External Boundary surface without Ambient Property
Global ambient will be used by default - check that this is what is intended."

Thanks.

[Gabriel_C]

hello,

it's a Info not an warning or error so simulation works fine without changing anything. To solve it just click the red hallow cuboid in the project tree "System" -> "Boudaries" Tab -> "Ambient" and load an ambient from the library (or create one).

Best regards, Gabriel

[nirmal_singh]

Thanks Gabriel.

My concern isn`t about the warning/error.

Actually, the outlet temperature of my Enclosure depends on this ambient somehow!
If I change default ambient to 30, my outlet temperature changes to 30.

So, I want to learn more about the interaction of this ambient with the rest of environment. I want to learn that how this value affects the rest of the code.

[Gabriel_C]

you're welcome.

the ambient properties (air temperature, radiant temperatures and external velocity) that you define for "Boundaries -> Ambient" are properties of the ambient outside the solution domain. Somehow these are the boundary conditions of you solution domain.

It's normal that the "boundaries ambient" influence you results: for example a simulation at 35°C set in "Model Setup -> Default Ambient/Radiant Temperature" and no ambient attached will show lower temperatures then the same simulation but with "system-> boundaries ->ambient" with ambient/radiant temperature at 60°C.

This is because energy from the outside ambient heats by radiation your model.

Hope it helps.

[nirmal_singh]

Thanks Gabriel for the useful information.

I have insulated my domain by using non-conducting and non-radiating cuboid sheets. I hope this technique will prevent any energy interaction with the surroundings.