help with setting up non-newtonian model

gandesk · December 29, 2010, 12:33

Hello all,

I am trying to simulate a two phase vof model in which one of the phases is a polymer and the other is air. When i try to define viscosity of the polymer in the properties table with non-newtonian powerlaw model, at the end it says that

"Note: Enabling energy equation as required by material density method. " and the solver is automatically enabling energy equation which I dont want to. I just want to simulate the fluid mechanics part of the case.

Please help me what wud be the problem??

Thanks
Sandeep

ComputerGuy · December 29, 2010, 17:32

Sandeep,

Depending on the model you choose for non-Newtonian behavior, a reference temperature is required. If a reference temperature is required, the energy equation must be enabled.

Please look at the Fluent manual (section 8.4.5) and you'll be able to see which non-Newtonian models require a reference temperature

Regards,
ComputerGuy

December 29, 2010, 12:33	help with setting up non-newtonian model	#1
gandesk Member Sandeep Join Date: Jul 2010 Posts: 48 Rep Power: 15	Hello all, I am trying to simulate a two phase vof model in which one of the phases is a polymer and the other is air. When i try to define viscosity of the polymer in the properties table with non-newtonian powerlaw model, at the end it says that "Note: Enabling energy equation as required by material density method. " and the solver is automatically enabling energy equation which I dont want to. I just want to simulate the fluid mechanics part of the case. Please help me what wud be the problem?? Thanks Sandeep

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December 29, 2010, 17:32		#2
ComputerGuy Senior Member Real Name :) Join Date: Jan 2010 Location: United States Posts: 192 Rep Power: 16	Sandeep, Depending on the model you choose for non-Newtonian behavior, a reference temperature is required. If a reference temperature is required, the energy equation must be enabled. Please look at the Fluent manual (section 8.4.5) and you'll be able to see which non-Newtonian models require a reference temperature Regards, ComputerGuy