Learning Forum

[saadalam]

I am having confusion how to apply correct boundary conditions in a green-house chamber covered with poly-ethane sheet which is inside another chamber which is also covered with poly-ethane sheet.

This chamber is subjected to sunlight (solar radiation) and air at ambient conditions.

I am attaching image of CAD Model for reference.

Please help.!

 

[Amine Ben Hadj Ali]

Please insert pictures here and add why are you confused.

[saadalam]

Please insert pictures here and add why are you confused.

Very sorry for late reply and thanks for your time and attention.

I am especially confused of BC on Polyethylene Sheet shown in Yellow Color (i.e. which is covering the Primary Chamber) which has air at ambient conditions on both side (i.e. outside and inside)

[Rob]

What's confusing about it? Which solver do you want to use?

[Amine Ben Hadj Ali]

Semi transparent?

[saadalam]

Yes Semi transparent

[saadalam]

Fluent
I am especially confused of BC on Polyethylene Sheet shown in Yellow Color (i.e. which is covering the Primary Chamber) which has air at ambient conditions on both side (i.e. outside and inside)

[Rob]

Yes, that's a possible using a wall condition. If you want light to pass through it turn on shell conduction and semi-transparent. The former is to force the solver to use the material radiation properties.  

[saadalam]

@rwoolhou.

I got your point but there is a problem.

Since i have 2 fluid domains representing Primary and secondary chambers, So I have their walls like stick to each other (As shown in attached Image).

Kindly tell me this also, Should I apply same "Semi transparent Wall conditions"  on both or any one wall is enough??