Combining 2D and 3D model in fluent

lovepreet · January 15, 2018, 18:25

I have 2D model with lumped parameter assumption and now i want to validate it for 3D, still considering some parts of the model in 2D. I want to solve the 3D equations for the part of my computational domain and the simple 2D equations for rest of the model. Is it possible to do in fluent?

LuckyTran · January 16, 2018, 10:28

I would say no. It's really tough. The 1D/2D-lumped assumption (namely infinite conductivity in a one or more directions) makes the problem numerically unstable.

Probably the best you can do is treat the lumped part of the domain as purely a BC for your 3D problem, but this still leads to inconsistencies.

January 15, 2018, 18:25	Combining 2D and 3D model in fluent	#1
lovepreet New Member Join Date: Jan 2018 Posts: 1 Rep Power: 0	I have 2D model with lumped parameter assumption and now i want to validate it for 3D, still considering some parts of the model in 2D. I want to solve the 3D equations for the part of my computational domain and the simple 2D equations for rest of the model. Is it possible to do in fluent?

January 16, 2018, 10:28		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	I would say no. It's really tough. The 1D/2D-lumped assumption (namely infinite conductivity in a one or more directions) makes the problem numerically unstable. Probably the best you can do is treat the lumped part of the domain as purely a BC for your 3D problem, but this still leads to inconsistencies.