What is the working principle of Venturi meter?
The principle behind the operation of the Venturi flowmeter is the Bernoulli effect. The Venturi measures a fluid’s flowrate by reducing the cross sectional flow area in the flow path and generating a pressure difference.
What is Venturimeter explain its construction and working?
Venturimeter is work on Bernoulli’s equation and its simple principle is when velocity increases pressure decreases. The increases in velocity at the throat result in decreases in pressure at this section , due to this pressure difference is developed between inlet valve and throat of the venturimeter.
What is the principle on which Venturimeter is based?
The working of venturimeter is based on the principle of Bernoulli’s equation. Bernoulli’s Statement: It states that in a steady, ideal flow of an incompressible fluid, the total energy at any point of the fluid is constant.
On what principle Venturi meter is based and why it is used?
The principle of venturimeter is that when a fluid flows through the venturimeter, it accelerates in the convergent section and decelerates in the divergent section, resulting in a drop in the static pressure followed by a pressure recovery in the flow direction.
What are the applications of Bernoulli’s Theorem?
(i) Attraction between two closely parallel moving boats (or buses): When two boats or buses move side by side in the same direction, the water (or air) in the region between them moves faster than that on the remote sides.
What is Venturi meter and its application?
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 the advantage and disadvantage of Venturi meter?
Benefits or advantages of Venturimeter ➨It has low head loss which is about 10% of differential pressure head. ➨It can be used to measure higher flow rates in pipes having few meters of diameters. This is due to high coefficient of discharge owing to lower loss.
Why Venturi is used?
Venturi are used to measure the speed of a fluid, by measuring the pressure changes from one point to another along the venture. A venturi can also be used to inject a liquid or a gas into another liquid. A pump forces the liquid flow through a tube connected to: A short piece of tube connected to the gas source.
What is the use of Venturi tube?
The Venturi tube or venturimeter is an instrument for measuring with accuracy the flow rate of fluids in pipes.
What does Venturi mean?
: a short tube with a tapering constriction in the middle that causes an increase in the velocity of flow of a fluid and a corresponding decrease in fluid pressure and that is used especially in measuring fluid flow or for creating a suction (as for driving aircraft instruments or drawing fuel into the flow stream of a …
How accurate is a Venturi meter?
Accuracy of +/-1.0 to +/-2.0 percent of actual rate of flow down to approximately 125,000 pipe Reynolds number (Rd). Head loss ranging from eight to 14 percent of differential, depending on the beta ratio of the meter.
How do you calculate Venturi flow rate?
Venturi Flow Equation and Calculator
- Preview: Venturi Flow Calculator.
- and.
- Therefore:
- and.
- Qmass = ρ · Q. Where: Q = volumetric flow rate (m3/s, in3/s) Qmass = Mass flowrate (kg/s, lbs/s) A1 = area = Π · r2 (mm2, in2) A2 = area = Π · r2 (mm2, in2) r1 = radius inlet at A1 (mm, in) r2 = radius inlet at A2 (mm, in) p1 = Measured pressure (Pa, lb/in2)
Which is better orifice or Venturi?
The Venturi meter is insensitive to changes in velocity vector. The velocity vector of fluid must be perpendicular to the orifice plate for lower pressure loss and better accuracy in measurement of average velocity or flow rate or the flowing fluid.
Which one is more accurate orifice or Venturi?
Measurement of mass flow rate of fluid in fluid mechanics is by meters (venturimeter, orifice meter) connected at the entrance and at throat by recording pressure drop by manometer. Out of these, venturimeter is found to be the most accurate device for measurement of mass flow rate.
Which flowmeter is the most accurate?
Coriolis mass flow meters
Where is orifice meter used?
Orifice meter: is a device used for measuring the rate of flow of a fluid flowing through a pipe. It is a cheaper device as compared to venturimeter. This also work on the same principle as that of venturimeter. It consists of flat circular plate which has a circular hole, in concentric with the pipe.
Which is the cheapest device for measuring flow rate?
Orificemeter
Which method is used to measure the flow rate of liquid?
A Pitot-tube is used to measure fluid flow velocity. The tube is pointed into the flow and the difference between the stagnation pressure at the tip of the probe and the static pressure at its side is measured, yielding the dynamic pressure from which the fluid velocity is calculated using Bernoulli’s equation.
How do we measure the flow rate of liquid?
Measuring Flow in Liquids with Pressure Transducers. Differential pressure transducers have been widely used to measure flow rate of in-compressible liquids such as water. The most common method is to measure the pressure drop across an orifice plate in the pipe and calculate the flow rate.
What is the unit of flow rate Mcq?
Explanation: Mass flow rate = m/t, => unit = kg/s, volumetric flow rate = V/t, => unit = Liters/s, molar rate = n/t, => unit = moles/s.
What is the unit of flow rate f )?
In S.I. units (International System of Units), volume flow rate has units of meters cubed per second, m 3 s \dfrac{\text m^3}{\text s} sm3start fraction, start text, m, end text, cubed, divided by, start text, s, end text, end fraction, since it tells you the number of cubic meters of fluid that flow per second.
What is unit for flow rate for gases?
Gas mass flow rate is the actual mass of a gas which moves through a measurement instrument per unit of time. Its units are usually in standard liters per minute (slpm) or standard cubic centimeters per minute (sccm) in SI units. The most common English units include standard cubic feet per minute (scfm).
How types of groynes are there?
How types of groynes are there? Explanation: Depending upon the material used for the construction of the groynes, they are classified into two types, namely impermeable groynes and permeable groynes.
What is groynes or Spurs?
Also called groynes, spur, dikes, or transverse dikes. They constitute probably the most widely used training work. Spurs are the structures constructed on the river bank normal to the dominant flow direction or at an angle pointing upstream or downstream. A spur consists of a shank and a nose or head.
What are sea groynes?
A groyne is a shore protection structure built perpendicular to the shoreline of the coast (or river), over the beach and into the shoreface (the area between the nearshore region and the inner continental shelf), to reduce longshore drift and trap sediments.
In which part of India do non perennial rivers flow?
Most of them are non-perennial. The streams of inland drainage basin of western Rajasthan are few. Most of them are of an ephemeral character. The main Himalayan river systems are those of the Indus and the Ganga-Brahmaputra-Meghna system.
Which is the longest river in India?
| Sl. No. | River | Length (km) |
|---|---|---|
| 1. | Indus | 2,900 |
| 2. | Brahmaputra | 2,900 |
| 3. | Ganga | 2,510 |
| 4. | Godavari | 1,450 |
What are called perennial rivers?
A perennial stream or perennial river is a stream or river (channel) which has constant stream throughout the year through parts of its stream bed during years of normal rainfall. All other streams, or portions thereof, should be considered seasonal rivers or lakes.
Which Indian state has most rivers?
Andhra Pradesh
Which Indian state has no river?
List of Rivers of India
| Sr. No. | State | Total Number of River |
|---|---|---|
| 4 | Gujarat | 10 |
| 5 | Jharkhand | 08 |
| 6 | Karnataka | 14 |
| 7 | Kerala | 20 |