What is local and convective acceleration?
What is local and convective acceleration?
Convective acceleration is defined as the rate of change of velocity. due to the change of position of fluid particles in a fluid flow. Local acceleration or Temporal acceleration is defined as the rate of. change of velocity with respect to time at a given point in a flow field.
What is local velocity?
Local means it’s relative to the object in question. Global means it’s relative to the entire world. So if you have a global velocity of Y+10 (that’s “up”), but you’re lying on your back, your local velocity is Z+10 (that’s forward to you, but up to the world itself).
What is material acceleration?
The material acceleration is defined as the acceleration following a fluid particle. The term on the left is the total acceleration following a fluid particle. It represents the actual acceleration vector experienced by whatever fluid particle happens to reside at the location and time of interest.
What will be the shape of the Pathline for a one dimensional flow be like?
What will be the shape of the pathline for an one-dimensional flow be like? Explanation: A pathline is the path followed by a particle in motion. For an one-dimensional flow, the fluids move in only one dimension (say x). Hence the pathline will also be a straight line (along that direction).
Which type of matter one Cannot find a free surface?
In which type of matter, one won’t find a free surface? Explanation: Solid molecules have a definite shape due to large inter-molecular forces. In liquids, molecules are free to move inside the whole mass but rarely escape from itself. Thus, gases won’t form any free surface.
What is the study of fluids at rest?
Fluid mechanics is the study of fluids at rest and in motion. A fluid is defined as a material that continuously deforms under a constant load. There are five relationships that are most useful in fluid mechanics problems: kinematic, stress, conservation, regulating, and constitutive.
What is ideal fluid Mcq?
one which obeys Newton’s law of viscosity. frictionless and incompressible. very viscous. frictionless and compressible.
When a body is placed over a liquid it will sink down if?
When a body is placed over a liquid, it will sink down if. Gravitational force is equal to the up-thrust of the liquid. Gravitational force is less than the up-thrust of the liquid. Gravitational force is more than the up-thrust of the liquid.
When a fluid is flowing through a pipe the velocity of liquid is?
Q = A2V2. Thus the velocity of the liquid at any point in the pipe is inversely propor- tional to the cross-sectional area of the pipe. The liquid will be moving slowly where the area is large and will be moving rapidly where the area is small. 1r X 1 ft2 = 0.0055 ft2.
When a body is floating on a liquid?
When a body is immersed partly or wholly in a liquid, there is an apparent loss in the weight of the body which is equal to the weight of liquid displaced by the body. A body floats in a liquid if: 1. Density of the material of the body is less than or equal to the density of the liquid.
Why does pressure decrease in divergent Venturimeter?
The venturimeter is always used in a way that the upstream part of the flow takes place through the short conical portion while the downstream part of the flow through the long one. Subsequently, a decrease in the velocity and an increase in the pressure takes place in course of flow through the divergent part.
Why diverging section of Venturi is long?
Originally Answered: why the length of the diverging section in the venturimeter is longer than the converging ? Because it reduce the backward motion of flow. It is not related to length. It is related with the angle.
Why is the diverging angle is smaller than the converging angle for a Venturimeter?
Why is the diverging angle smaller than the converging angle for a venturimeter? so the diverging angle of the diverging section of the venturi is kept so small to reduce the probability of flow separation and hence keeping the pressure recovering efficiency as high as possible.
What is Venturimeter constant?
HEADS BETWEEN ENTRANCE AND THROAT SECTION AND IS KNOWN AS “VENTURI HEAD” C IS CALLED CONSTANT OF VENTURIMETER AND DEPENDS UPON GEOMETRIC PARAMETERS OF GIVEN VENTURIMETER AND K IS CALLED DISCHARGE COEFFICIENT. EXPERIMENTAL SETUP THE VENTURIMETER IS FITTED IN A PIPE LINE, TO WHICH AN INLET VALVE IS FITTED.
What is velocity of efflux?
The average flow rate of material emitted into the atmosphere from a source such as a smokestack. This is the average speed of gas out of the top of a smokestack.
Where is Venturimeter used?
A venturi meter is also called a venturi flowmeter. It is used to calculate the velocity of fluids in running through a pipeline. The fluid may be a liquid or a gas. The meter consists of a pipe with a narrowing throat that expands back to it’s original diameter on the other side of the choke point.
What is velocity of efflux Class 11?
The speed of efflux, v1,from the side of the container is given bythe application of Bernoulli’s equation. This is accordance to Torricelli’s law which states that the speed by which the fluid is flowing out of a small slit of a container is same as the velocity of a freely falling body.