Related Questions

At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe?
A 0.5
B > 0.6
Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is
A 0.1
B >1
C L
For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance).
A $$\frac{{\text{V}}}{{{{\text{V}}_{\max }}}} = {\left( {\frac{{\text{x}}}{{\text{r}}}} \right)^{\frac{1}{7}}}$$
B $$\frac{{\text{V}}}{{{{\text{V}}_{\max }}}} = {\left( {\frac{{\text{r}}}{{\text{x}}}} \right)^{\frac{1}{7}}}$$
C $$\frac{{\text{V}}}{{{{\text{V}}_{\max }}}} = {\left( {{\text{x}} \times {\text{r}}} \right)^{\frac{1}{7}}}$$
D None of these
For __________ Prandtl number values, the heat conduction will be negligible in the buffer zone.
A Extremely low
B Low
C High
D No
At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical?
A 1
B > 1
C None of these
In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be
A Same as that for fluid flow
B Less than that for fluid flow
C More than that for fluid flow
D D2 - D1 (D1 and D2 are I.D. of inner and outer pipes respectively)
Pressure drop (Δp) for a fluid flowing in turbulent flow through a pipe is a function of velocity (V) as
A V1.8
B V-0.2
C V2.7
D V2
Prandtl and Reynold's analogies are identical for Prandtl number value of
A 0
B 0.5
C 1
D 5
Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer.
A Grashoff
B Biot
C Stantan
D Reynolds
A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:
A 6 hours
B 10 hours
C 15 hours
D 30 hours

Next steps