Match the following Listl (Dimensionless number) with Listll (Physical interpretation).
Listl
A. Drag coefficient
B. Eckert number
C. Colburn j factor
D. Fourier number
Listll
1. Dimensionless heat transfer coefficient
2. Ratio of shear stress to free stream kinetic energy
3. Dimensionless time
4. Kinetic energy of flow relative to boundary layer enthalpy difference
Which of the following dimensionless number/parameter is different from others?
(b), (c) and (d) are dimensionless heat transfer coefficient
Match Listl with Listll
Listl
A. Reynolds number
B. Prandtl number
C. Nusselt number
D. Mach number
ListlI
1. Film coefficient, pipe diameter, thermal conductivity
2. Flow velocity, acoustic velocity
3. Heat capacity, dynamic viscosity, thermal conductivity
4. Flow velocity, pipe diameter, kinematic viscosity
Stanton number may be interpreted as the ratio of
The Nusselt number is related to Reynolds number in laminar and turbulent flows respectively as
Nu = C Re^{0.5} Pr^{0.33} (for laminar flow) Nu = C Re^{0.8} Pr^{0.33} (for turbulent flow)
For turbulent flow over a flat plate, the average value of Nusselt number is prescribed by the relation
Which of the followings is then a false statement? The average heat transfer coefficient increase as
∴ h_{2} decreases as 1/5 power of plate length.
Reynolds analogy states that
The flow and heat transfer in coiled tubes are governed by
The flow and heat transfer in coiled tubes are governed by Dean number,
Where D is tube diameter
d_{c} is coil diameter
Which one of the following is flow properly
Reynolds number is flow property depends on velocity of flow. It is not the property of fluid.
For a fluid having Prandtl number equal to unity how are the hydrodynamic boundary layer thickness δ and the thermal boundary layer thickness δ_{t} related
Where,
δ_{t} = Thickness of Thermal boundary layer
δ = Thickness of hydrodynamic boundary layer
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