Advertisements
Advertisements
प्रश्न
What is Reynold’s number? Give its significance.
Advertisements
उत्तर
It is a dimensionless number that determines the nature of the flow of fluid through a pipe. Reynold’s number is given by,
Rc = `(ρ"vD")/"η"`
If, Rc < 1000 - Streamline
1000 < Rc < 2000 - Unsteady
Rc > 2000 - Turbulent
APPEARS IN
संबंधित प्रश्न
A raindrop falls near the surface of the earth with almost uniform velocity because
The unit of viscosity is
Which has greater viscosity, oil or honey? Why?
Define the coefficient of viscosity of a liquid.
Distinguish between streamlined flow and turbulent flow.
Write down the expression for Stoke’s force and explain the symbols involved in it.
Choose the CORRECT statement.
The velocity of water in river is 8 km/hr of the upper surface. The river is 12 m deep. If the coefficient of viscosity of water is 10-2 poise then the shearing stress between horizontal layers of water is ______.
The velocity of a small ball of mass 0.3 g and density 8 g/cc when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is 1.3 g/cc, then the value of viscous force acting on the ball will be x × 10-4 N, and the value of x is ______.
[use g = 10 m/s2]
A water pipe with diameter of 5.0 cm is connected to another pipe of diameter 2.5 cm. How would the speeds of the water flow compare?
