What is the difference between Venturimeter and pitot tube?

A pitot tube is a horizontal tube that contains a U-shaped tube. It is used to determine the velocity of a fluid flowing past it. A Venturi tube is a horizontal tube with a constricted region – a region with decreased cross-sectional area – in its middle.

How venturimeter orifice meter and pitot tubes are different from each other?

The orifice meter is a device (cheaper than venturimeter) used for measuring the discharge of the liquid flowing through a pipe. It works on the same principle as that of venturimeter. The pitot tube is a small open tube bent at right angle. It is used to measure the velocity of flow at the required point in a pipe.

What is difference between Venturi and venturimeter?

The difference between venturi meter and orifice meter are: There are three parts in a venturi meter, and they are the converging section, the throat, and the diverging section. Whereas the orifice meter consists of a thin plate and a bore.

What is the difference between venturimeter and nozzle meter?

Venturi Meters are Measurement Devices. Their primary objective is to measure flow volumes by measuring Pressure Differences in a specially defined profile. Nozzles are devices designed for the most efficient conversion of fluid Pressures to fluid Flow. The two are not interchangeable.

What is a pitot tube used for?

Pitot tubes were invented by Henri Pitot in 1732 to measure the flowing velocity of fluids. Basically a differential pressure (d/p) flow meter, a pitot tube measures two pressures: the static and the total impact pressure.

Venturi effect and Pitot tubes | Fluids | Physics | Khan Academy

What is Venturimeter used for?

Venturimeter is a device used to measure the rate of flow of fluid flowing through a pipe. Venturimeter is a device which is used for measuring the rate of flow of fluid flowing through a pipe.

What is Venturimeter fluid mechanics?

A venturi meter is a measuring or also considered as a meter device that is usually used to measure the flow of a fluid in the pipe. A Venturi meter may also be used to increase the velocity of any type fluid in a pipe at any particular point.

Why Venturimeter is more accurate?

Higher flow rates in high quality orifice plates gives increased accuracy. Venturimeters are widely used for high flow rates. They can handle 25-50% more flow rate than an orifice.

Can Venturimeter be used vertically?

Venturimeters can be installed in a horizontal, inclined, or vertical direction.

Does a Venturi increase pressure?

A Venturi is a system for speeding the flow of the fluid, by constricting it in a cone shape tube. In the restriction the fluid must increase its velocity reducing its pressure and producing a partial vacuum. As the fluid leave the constriction, its pressure increase back to the ambient or pipe level.

What is the difference between Weir and notch?

A notch may be defined as an opening provided in the side of tank or vessel such that the liquid surface in tank is below the top edge of opening. A weir may be defined as any regular obstruction in open stream over which the flow takes place. Made of metallic plates.

What is Venturimeter and orifice meter?

Venturi Meter versus Orifice Meter:- Venturi meters and Orifice meters are devices which are used to measure average velocity, volumetric flow rate or mass flow rate of a flowing fluid by reducing the pressure of the flowing fluid.

What is the difference between orifice meter and orifice plate?

FAQ on venturimeter and orifice meter difference:-

The main difference between venturimeter and orifice meter is the Venturimeter is not flexible with the flow rate range while the orifice plate in the orifice meter can easily change for different flow rates.

Is venturimeter more accurate than orifice meter?

The Orificemeter readings are more accurate than Venturimeter. The principle of Orificemeter is same as that of Venturimeter. The principle of Orificemeter is same as that of Venturimeter.

What are limitations of venturimeter?

Disadvantages of venturi meter:

Requires a long placement length. That is, the venturi meter must be driven by a straight tube that has no connections or misalignments to avoid turbulence in the flow, for satisfactory operation. It can not be used in pipes of less than 7.5 cm in diameter. Maintenance is not easy.

What are the advantages and disadvantages of venturimeter?

Advantages and disadvantages of Venturi meter

Smooth construction and low cone angle help to solid particles flow through it. So it can be used for dirty fluids. It can be installed in any direction horizontal, vertical and inclined. More accurate than orifice and flow nozzle.

Where is venturi tube used?

There are countless applications for the principle—e.g., an automobile carburetor, in which air flows through a venturi channel at whose throat gasoline vapour enters through an opening, drawn in by the low pressure. The pressure differential can also be used to measure fluid flow.

What is the difference between orifice and restriction orifice?

Difference between an Orifice Plate and a Restriction Orifice? An Orifice Plate is used to measure flow, while a Restriction Orifice is used to drop upstream pressure of a system. It is similar to an orifice plate but is thicker.

Which type of flow takes place in a Venturi meter?

Venturiflume is also known as throat flume and is used for measurement of flow in streams, small channels etc. As the flow takes place in an open channel so the pressure of the flow is atmospheric pressure.

Where is orifice meter used?

The orifice plate flow meter is a type of differential pressure flow meter that is commonly used in clean liquid, gas, and stream mass flow measurement.

What is difference between weir and barrage?

Barrages are built near cities so that the amount of water flowing in the river can be controlled by opening and closing the gates to save the city from flooding. A weir, in contrast, is built, for example, in tourist destinations and preservation areas to allow the fish to swim upstream.

What is difference between open channel flow and close channel flow?

However the major difference is that the flow in closed conduit is influenced by pressure in the line whereas same in open channel it only by gravity. And in case of closed conduit fluid does not come in contact with atmosphere, whereas in open channel it is in touch with atmosphere.

What is the difference between open channel flow and pipe flow?

Pipe flow Vs Open channel Flow

Open Channel Flow is a type of fluid flow in a conduit with a free surface open to the atmosphere. The pipe flow is a type of flow within a closed conduit. The maximum velocity occurs at the center of the pipe. HGL(Hydraulic Gradient Line ) coincides with the water surface line.

Why does air speed up in a Venturi?

The Venturi meter demonstrator shows how fluid pressure is reduced when it flows through a constricted section of tubing. It uses Bernoullii's Principle, which states that air/fluid flows faster in the constricted section.

Why does pressure drop in Venturi?

The pressure increases over the smaller surface area, while the narrow flow then creates a vacuum in the water. The fluid's kinetic energy increases results in a pressure decrease.