I have found formula for forced convective heat transfer coefficient hfc=kBRen/D
in W/m2K.
where, k=thermal conductivity of air
Re=Reynolds number
D=diameter of kiln
According to some research paper B,n constants varies with ranges of Re value.I want to know the significance of B and n with Reynolds number
If You know the amount of heat carried out by the forced working fluid by measuring mass flow rate and temperature difference between inlet and exit, then you may divide this amount by the (area of contact *temperature difference of surface and average temperature of forced flow). Alternatively, you may pick up a proper empirical relation between Nusselt number as a function of both Reynolds number and Prandtl number and calculate the convective heat transfer coefficient.
Hello Anil Guimire
May be this is too late, but the Nusselt Number is:
Nul=BRenPrm
Where B, n, m are are constant of the curve approximation(Regression Lineal) n a log-log graphics. Remember the Re= Reynolds Number, Pr=Prandlt number.
H= k*Nu/x ; K= k=thermal conductivity of air, Nu=Nusselt Number; x= Distance of the plate.
The file i share you is the experiment do you need to find the convective coefficient. But in you case you need a cylindrical surface to do that. On your equation the Nu is:
Nu=BRn
So you can considerate the rotatory klin like a big Tube, so the Nu=hfcD/k,
- Badges
- Science topic
- Similar topics
- Engineering
- Thermal Engineering