Q. How to define a energy source (sink) such that a specified temperature is maintained in the subdomain?
A. Set an Energy Source term in the required subdomain in the following form:
Source = C*Cp*(TTspec)
where C is a large number (example 10E+8[kg m^3 s^1]), Cp is the specific heat capacity of the fluid, T is the local temperature and Tspec is the temperature that needs to be maintained in the subdomain.
The following CEL demonstrates how to implement this in CFX 5. (NOTE the value of the 'Source Coefficient' in the definition of the subdomain source)
CEL:
EXPRESSIONS:
Constant = 10E+8 [kg m^3 s^1]
Tspec = 300 [K]
heatsink = Constant *Specific Heat Capacity at Constant Pressure *( T  Tspec)
END
END
SUBDOMAIN: sink
Coord Frame = Coord 0
Location = B41
SOURCES:
EQUATION SOURCE: energy
Option = Source
Source = heatsink
Source Coefficient = Constant*Specific Heat Capacity at Constant Pressure
END
END
END
Q. How to define a energy source (sink) such that a specified temperature is maintained in the subdomain? A. Set an Energy Source term in the required subdomain in the following form: Source = C*Cp*(TTspec) where C is a large number (example 10E+8[kg m^3 s^1]), Cp is the specific heat capacity of the fluid, T is the local temperature and Tspec is the temperature that needs to be maintained in the subdomain. The following CEL demonstrates how to implement this in CFX 5. (NOTE the value of the 'Source Coefficient' in the definition of the subdomain source) CEL: EXPRESSIONS: Constant = 10E+8 [kg m^3 s^1] Tspec = 300 [K] heatsink = Constant *Specific Heat Capacity at Constant Pressure *( T  Tspec) END END SUBDOMAIN: sink Coord Frame = Coord 0 Location = B41 SOURCES: EQUATION SOURCE: energy Option = Source Source = heatsink Source Coefficient = Constant*Specific Heat Capacity at Constant Pressure END END END 

