
Value of Reynolds number for flow to be Laminar is
A. $ < 2000$
B. $ > 4000$
C. Between $2000$ and $4000$
D. Cannot be detected by Reynolds number
Answer
497.4k+ views
Hint: We know that fluid dynamics is a subdiscipline of fluid mechanism where we study about the flow of fluids. It is the foundation of the flow and movement of liquids and gases. As we know that there are three types of fluid flows: laminar flow, transient flow and turbulent flow.
Complete answer:
We can define Reynolds number as the ratio of inertial forces to viscous forces. It is a dimensionless term. Here inertial force can be defined as the force that allows the particles to follow the same path if any external force is not applied to the particle.
Mathematical expression of Reynolds number is given as; $R = \dfrac{{\rho VD}}{\mu }$ where $V$ is the flow of velocity, $D$ = characteristic linear dimension, $\rho $ is fluid density, $\mu $ is dynamic viscosity.
Laminar flow is the flow of particles of a fluid in a straight line path or parallel to each other. In this flow layers of water flow over one another at different speeds. For laminar flow the value of Reynolds number is less than 2000 and for turbulent flow the value of Reynolds number is greater than 4000.
So, the correct answer is “Option A”.
Note:
When the viscosity increases it restricts the flow of fluid. the It is a convenient parameter for predicting if a flow condition will be laminar or turbulent. When the inertial force dominates over the viscous force that means the flow of fluid is fast, then the flow is known as turbulent.
Complete answer:
We can define Reynolds number as the ratio of inertial forces to viscous forces. It is a dimensionless term. Here inertial force can be defined as the force that allows the particles to follow the same path if any external force is not applied to the particle.
Mathematical expression of Reynolds number is given as; $R = \dfrac{{\rho VD}}{\mu }$ where $V$ is the flow of velocity, $D$ = characteristic linear dimension, $\rho $ is fluid density, $\mu $ is dynamic viscosity.
Laminar flow is the flow of particles of a fluid in a straight line path or parallel to each other. In this flow layers of water flow over one another at different speeds. For laminar flow the value of Reynolds number is less than 2000 and for turbulent flow the value of Reynolds number is greater than 4000.
So, the correct answer is “Option A”.
Note:
When the viscosity increases it restricts the flow of fluid. the It is a convenient parameter for predicting if a flow condition will be laminar or turbulent. When the inertial force dominates over the viscous force that means the flow of fluid is fast, then the flow is known as turbulent.
Recently Updated Pages
Express the following as a fraction and simplify a class 7 maths CBSE

The length and width of a rectangle are in ratio of class 7 maths CBSE

The ratio of the income to the expenditure of a family class 7 maths CBSE

How do you write 025 million in scientific notatio class 7 maths CBSE

How do you convert 295 meters per second to kilometers class 7 maths CBSE

Write the following in Roman numerals 25819 class 7 maths CBSE

Trending doubts
What are Quantum numbers Explain the quantum number class 11 chemistry CBSE

Write the differences between monocot plants and dicot class 11 biology CBSE

In northern hemisphere 21st March is called as A Vernal class 11 social science CBSE

1 Quintal is equal to a 110 kg b 10 kg c 100kg d 1000 class 11 physics CBSE

List out the uses of ethanoic acid class 11 chemistry CBSE

Number of oneone functions from A to B where nA 4 and class 11 maths CBSE
