Related Questions

Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is
A 0.2
B 0.4
C 0.6
D 0.8
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
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
For __________ Prandtl number values, the heat conduction will be negligible in the buffer zone.
A Extremely low
B Low
C High
D No
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
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
Prandtl and Reynolds analogy are same, when Prandtl number is
A 0.5
B 1
C > 2
D 1.5
A water tank with 64-gallon capacity is filled by pipe A and emptied by pipe B. If the rate of water flow through pipe A is 2 gallons per hour, how many gallons per hour should flow through pipe B so that when both pipes are open, the initially empty tank shold be full in exactly 96 hours?
A 3/8
B 4/3
C 2/3
D 8/3

Next steps