What is a boundary layer in fluid mechanics?
Boundary layer, in fluid mechanics, thin layer of a flowing gas or liquid in contact with a surface such as that of an airplane wing or of the inside of a pipe. The flow in such boundary layers is generally laminar at the leading or upstream portion and turbulent in the trailing or downstream portion.
What do you understand by boundary layer illustrate with reference to flow over a flat plate?
This condition states that the velocity of the fluid at the solid surface equals the velocity of that surface. The result of this condition is that a boundary layer is formed in which the relative velocity varies from zero at the wall to the value of the relative velocity at some distance from the wall.
Which of the following is responsible for the separation of boundary layer?
The phenomenon is termed as separation of boundary layer. Separation takes place due to excessive momentum loss near the wall in a boundary layer trying to move downstream against increasing pressure, i.e., , which is called adverse pressure gradient.
Which among the following is a device that converts a laminar flow into a turbulent flow?
Turbulator
What is the most common assumption while dealing with fluid flow problems using continuity equation?
What is the most common assumption while dealing with fluid flow problems using continuity equation? Explanation: In majority of the fluid flow problems, flow is assumed to be steady.
What is the equation of continuity in the flow of liquids?
Derivation of continuity equation is one of the most important derivations in fluid dynamics. The continuity equation is defined as the product of cross-sectional area of the pipe and the velocity of the fluid at any given point along the pipe is constant.
Which equation must be perfunctory satisfied while dealing with fluid flow problems?
Which equation must be perfunctorily satisfied while dealing with fluid flow problems? Explanation: Continuity equation must be perfunctorily satisfied while dealing with fluid flow problems. 10. Convective acceleration is defined as the rate of change of velocity due to change of velocity with respect to time.
What are the applications of Bernoulli’s equation?
APPLICATION IN PUMPS: Volute in the casing of centrifugal pumps converts velocity of fluid into pressure energy by increasing area of flow. The conversion of kinetic energy into pressure is according to the Bernoulli equation.
What is the most beautiful equation?
Euler’s identity