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Old   June 14, 2013, 19:05
Question Question about heat transfer coefficient setting for CFX
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Meimei Wang
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Hi,

I'm doing the conjugate heat transfer. I'd like to set up a heat transfer coefficient at the solid porous interface. But my setting doesn't work at all. The simulation result is the same to the result of the same simulation but without adding heat transfer coefficient.

I set up everything by button clicking. There is one thing strange during the setting: I don't find the heat transfer coefficient setting button at the 'Interface' column. So I just skip that part. I only set up the 'nonoverlap' column of porous domain and solid domain to heat transfer coefficient.

Here is my CCL code. There isn't any error report. Could you debug it for me?

FLOW: Flow Analysis 1 &replace DOMAIN: porous3
Coord Frame = Coord 0
Domain Type = Porous
Location = POROUS3
BOUNDARY: porou2_porous3_domain Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = INTERFACE_POROUS2_POROUS3_2
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
MASS AND MOMENTUM:
Option = Conservative Interface Flux
END
TURBULENCE:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: porous3 Default
Boundary Type = WALL
Create Other Side = Off
Interface Boundary = Off
Location = Primitive 2D C
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Heat Transfer Coefficient = heat transfer coefficient
Option = Heat Transfer Coefficient
Outside Temperature = Inlet temperature
END
MASS AND MOMENTUM:
Option = No Slip Wall
END
WALL ROUGHNESS:
Option = Smooth Wall
END
END
END
BOUNDARY: porous3 periodic Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = PERIODIC4.1
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
MASS AND MOMENTUM:
Option = Conservative Interface Flux
END
TURBULENCE:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: porous3 periodic Side 2
Boundary Type = INTERFACE
Interface Boundary = On
Location = PERIODIC4.2
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
MASS AND MOMENTUM:
Option = Conservative Interface Flux
END
TURBULENCE:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: porous3 symmetry
Boundary Type = SYMMETRY
Interface Boundary = Off
Location = SYMMETRY4
END
BOUNDARY: porous3_outlet Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = OUTLET_POROUS3_INTERFACE_1
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
MASS AND MOMENTUM:
Option = Conservative Interface Flux
END
TURBULENCE:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: solid porous interface3 Side 2
Boundary Type = INTERFACE
Interface Boundary = On
Location = SURFACE3
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
MASS AND MOMENTUM:
Option = No Slip Wall
END
WALL ROUGHNESS:
Option = Smooth Wall
END
END
NONOVERLAP CONDITIONS:
Boundary Type = WALL
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Heat Transfer Coefficient = heat transfer coefficient
Option = Heat Transfer Coefficient
Outside Temperature = Inlet temperature
END
MASS AND MOMENTUM:
Option = No Slip Wall
END
WALL ROUGHNESS:
Option = Smooth Wall
END
END
END
END
DOMAIN MODELS:
BUOYANCY MODEL:
Option = Non Buoyant
END
DOMAIN MOTION:
Option = Stationary
END
MESH DEFORMATION:
Option = None
END
REFERENCE PRESSURE:
Reference Pressure = 1 [atm]
END
END
FLUID DEFINITION: Fluid 1
Material = water table interpolation then conducitity modified
Option = Material Library
MORPHOLOGY:
Option = Continuous Fluid
END
END
FLUID MODELS:
COMBUSTION MODEL:
Option = None
END
HEAT TRANSFER MODEL:
Option = Thermal Energy
END
THERMAL RADIATION MODEL:
Option = None
END
TURBULENCE MODEL:
Option = Reynolds Stress
END
TURBULENT HEAT TRANSFER:
TURBULENT FLUX CLOSURE:
Option = Eddy Diffusivity
Turbulent Prandtl Number = 0.9
END
END
TURBULENT WALL FUNCTIONS:
Option = Scalable
END
END
POROSITY MODELS:
AREA POROSITY:
Option = Isotropic
END
LOSS MODEL:
Loss Velocity Type = Superficial
Option = Directional Loss
DIRECTIONAL LOSS MODEL:
STREAMWISE DIRECTION:
Option = Cartesian Components
Unit Vector X Component = 0
Unit Vector Y Component = 1
Unit Vector Z Component = 0
END
STREAMWISE LOSS:
Option = Permeability and Loss Coefficient
Permeability = 1 [m^2]
END
TRANSVERSE LOSS:
Option = Permeability and Loss Coefficient
Permeability = spermeability [m^2]
END
END
END
VOLUME POROSITY:
Option = Value
Volume Porosity = 0.5
END
END
END
END




FLOW: Flow Analysis 1
&replace DOMAIN: solid
Coord Frame = Coord 0
Domain Type = Solid
Location = SILCON
BOUNDARY: heat flux
Boundary Type = WALL
Create Other Side = Off
Interface Boundary = Off
Location = HEAT_FLUX
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Heat Flux in = heat flux value
Option = Heat Flux
END
END
END
BOUNDARY: solid fluid interface Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = INTERFACE1
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
NONOVERLAP CONDITIONS:
Boundary Type = WALL
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Heat Transfer Coefficient = heat transfer coefficient
Option = Heat Transfer Coefficient
Outside Temperature = Inlet temperature
END
END
END
END
BOUNDARY: solid porous interface2 Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = INTERFACE2
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
NONOVERLAP CONDITIONS:
Boundary Type = WALL
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Heat Transfer Coefficient = heat transfer coefficient
Option = Heat Transfer Coefficient
Outside Temperature = Inlet temperature
END
END
END
END
BOUNDARY: solid porous interface3 Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = INTERFACE3
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
NONOVERLAP CONDITIONS:
Boundary Type = WALL
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Heat Transfer Coefficient = heat transfer coefficient
Option = Heat Transfer Coefficient
Outside Temperature = Inlet temperature
END
END
END
END
BOUNDARY: solid symmetry1
Boundary Type = SYMMETRY
Interface Boundary = Off
Location = SOLID_SYMMETRY1.1
END
BOUNDARY: solid symmetry2
Boundary Type = SYMMETRY
Interface Boundary = Off
Location = SOLID_SYMMETRY1.2
END
BOUNDARY: solid1 periodic Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = SOLID_PERIODIC1.1
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: solid1 periodic Side 2
Boundary Type = INTERFACE
Interface Boundary = On
Location = SOLID_PERIODIC1.2
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: solid2 periodic Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = SOLID_PERIODIC2.1
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: solid2 periodic Side 2
Boundary Type = INTERFACE
Interface Boundary = On
Location = SOLID_PERIODIC2.2
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: solid3 periodic Side 1
Boundary Type = INTERFACE
Interface Boundary = On
Location = SOLID_PERIODIC3.1
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
END
BOUNDARY: solid3 periodic Side 2
Boundary Type = INTERFACE
Interface Boundary = On
Location = SOLID_PERIODIC3.2
BOUNDARY CONDITIONS:
HEAT TRANSFER:
Option = Conservative Interface Flux
END
END
END
DOMAIN MODELS:
DOMAIN MOTION:
Option = Stationary
END
MESH DEFORMATION:
Option = None
END
END
SOLID DEFINITION: Solid 1
Material = silicon
Option = Material Library
MORPHOLOGY:
Option = Continuous Solid
END
END
SOLID MODELS:
HEAT TRANSFER MODEL:
Option = Thermal Energy
END
THERMAL RADIATION MODEL:
Option = None
END
END
END
END




FLOW: Flow Analysis 1
&replace DOMAIN INTERFACE: solid porous interface3
Boundary List1 = solid porous interface3 Side 1
Boundary List2 = solid porous interface3 Side 2
Filter Domain List1 = solid
Filter Domain List2 = porous3
Interface Region List1 = INTERFACE3
Interface Region List2 = SURFACE3
Interface Type = Solid Porous
INTERFACE MODELS:
Option = General Connection
FRAME CHANGE:
Option = None
END
PITCH CHANGE:
Option = None
END
END
MESH CONNECTION:
Option = GGI
END
END
END
__________________
Best regards,
Meimei

Last edited by Anna Tian; June 15, 2013 at 04:10.
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Old   June 16, 2013, 06:28
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You cannot set a HTC at an interface as the HTC is calculated as part of the simulation.
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