In turbulent flow, one can estimate the Nusselt number using the analo – McqOptions

MCQOPTIONS

1.	In turbulent flow, one can estimate the Nusselt number using the analogy between heat and momentum transfer. (Colburn analogy). This analogy relates the Nusselt number to the co-coefficient of friction, Cf as.
A.	(Nu)=0.5Cf(Re)(Pr)1/3
B.	(Nu)=0.5Cf(Re)(Pr)2/3
C.	(Nu)=Cf.Re.(Pr)1/3
D.	(Nu)=Cf.Re1/2(Pr)1/3
Answer» B. (Nu)=0.5Cf(Re)(Pr)2/3

Discussion

No Comment Found

Related MCQs

A sphere, a cube and a thin circular plate, all made of the same material and having the same mass are initially heated to the temperature of 250 degree Celsius. When left in air at room temperature, what will be their response to cooling?
On a summer day, a scooter rider feels more comfortable while on the move than while at a stop light because
Large heat transfer coefficients for vapour condensation can be achieved by promoting
Air at 20°C blows over a hot plate of 50 × 60 cm2 made of carbon steel maintained at 220°C. The convective heat transfer coefficient is 25 W/m2.K. What will be the heat loss from the plate?
If heat and mass transfer take place simultaneously, the ratio of heat transfer coefficient to the mass transfer coefficient is a function of the ratio of
\(Nu = CR_e^mP_r^n\) represents heat transfer under
A fin will be more effective when Biot number is
Prandtl number is expressed by
For flow over a flat plate the hydrodynamic boundary layer thickness is 0.5 mm. The dynamic viscosity is 25 × 10-6 Pa-s, specific heat is 2.0 kJ/kgK and thermal conductivity is 0.05 W/mK. The thermal boundary layer thickness would be
Biot number signifies the ratio of