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Fluid-Thermal Interacion Module
Posted Oct 12, 2009, 11:55 a.m. EDT 1 Reply
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I am trying to simulate the temperature and velocity distribution the following model:
Geometry : 2D representation of a tube
Left Opening : Air entering at velocity of 10m/s, T=320 K.
Wall : Insulated
Right Opening : Open to surrounding temperature of 300K. Pressure = 1 atm .
What would be the correct boundary setting for the right opening? Is it correct to set the left boundary to Temperature, 320 K, U = 10 m/s ?
Also, I have some trouble solving the model when I load the library model for air in the subdomain setting. It seems that some expressions are unable to be evaluated. There don't seems to be a problem when I use constant value instead of library material. Is it because I make some error in boundary values or initial values? Or is there some constants that I need to define to use the library material?
Geometry : 2D representation of a tube
Left Opening : Air entering at velocity of 10m/s, T=320 K.
Wall : Insulated
Right Opening : Open to surrounding temperature of 300K. Pressure = 1 atm .
What would be the correct boundary setting for the right opening? Is it correct to set the left boundary to Temperature, 320 K, U = 10 m/s ?
Also, I have some trouble solving the model when I load the library model for air in the subdomain setting. It seems that some expressions are unable to be evaluated. There don't seems to be a problem when I use constant value instead of library material. Is it because I make some error in boundary values or initial values? Or is there some constants that I need to define to use the library material?
1 Reply Last Post Oct 13, 2009, 5:14 a.m. EDT
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Posted:
2 decades ago
Hello,
I think for the right opening you should set:
- "Outlet, Pressure, no viscous stress with Po=1atm" for the fluid dynamics part
- "Convective flux" for the thermal part
Concerning the library material, for rho and eta you need to precise the right temperature: here rho(Tf) and eta(Tf) where Tf is the fluid temperature.
I think for the right opening you should set:
- "Outlet, Pressure, no viscous stress with Po=1atm" for the fluid dynamics part
- "Convective flux" for the thermal part
Concerning the library material, for rho and eta you need to precise the right temperature: here rho(Tf) and eta(Tf) where Tf is the fluid temperature.