Calculation of Heat Transfer coefficient
Hello i am doing a heat transfer analysis of fluid flowing through a subchannel. Constant heat flux condition is given to the wall. Using Mass flow inlet and Pressure outlet.
In postprocessing of CFX there is a parameter "wall heat transfer coefficient". I want to know how is it being calculated in CFX. Actually i am calculating HTC by the following relation q=h*(TsTb) where,q=Heat flux, h=HTC, Ts=surface temp.,Tb=bulk temp. would u plz let me know about the parameter "wall HTC" and whether my way of calculating HTC is right? thank you. 
Re: Calculation of Heat Transfer coefficient
Hi,
Yes, you calculation is correct  although if you are using radiation modelling you may need to use just the convective wall heat transfer. The calculation of h in CFX is described int he manual in the section describing the turbulence model at the wall (assuming you are using a turbulence model!). In short, CFX calculates a wall heat transfer, then estimates an ambient temperature and calculates h based on that. It does not model h directly. Glenn Horrocks 
Re: Calculation of Heat Transfer coefficient
thanks glenn.

All times are GMT 4. The time now is 09:40. 