Boundary conditions

vahid7333 · June 17, 2023, 16:03

Hello, good time.
If I have named selection two face as one inlet, the number I give as mass flow inlet is divided by two or the same number is considered for both face.

LuckyTran · June 18, 2023, 13:22

Sry the post is confusing. Named selections are just tags used as shortcuts. There is never any division by two but what matters is how many boundaries you have. Using named selections will make the corresponding boundaries a mass flow inlet. You can have multiple named selection point to one boundary or you can have one named selection point to multiple boundaries.

How many boundaries do you have? Each boundary will be a mass flow rate boundary condition. Each boundary then will have the set mass flow rate. If you have 1 boundary that means you have 1 boundary with the flowrate. If you have 10 boundaries ,that means you have 10 inlets each with the flowrate so your total is 10x that amount. If you have no boundaries then you have no flow at all.

June 17, 2023, 16:03	Boundary conditions	#1
vahid7333 New Member vahid Join Date: Nov 2022 Location: iran Posts: 17 Rep Power: 4	Hello, good time. If I have named selection two face as one inlet, the number I give as mass flow inlet is divided by two or the same number is considered for both face.

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June 18, 2023, 13:22		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,761 Rep Power: 66	Sry the post is confusing. Named selections are just tags used as shortcuts. There is never any division by two but what matters is how many boundaries you have. Using named selections will make the corresponding boundaries a mass flow inlet. You can have multiple named selection point to one boundary or you can have one named selection point to multiple boundaries. How many boundaries do you have? Each boundary will be a mass flow rate boundary condition. Each boundary then will have the set mass flow rate. If you have 1 boundary that means you have 1 boundary with the flowrate. If you have 10 boundaries ,that means you have 10 inlets each with the flowrate so your total is 10x that amount. If you have no boundaries then you have no flow at all.