What Is Meant By Variable Area Meter

What are variable areas?

: being or relating to a motion-picture sound track in which the sounds are represented by an opaque line of varying width that runs parallel to the length of the film variable-area track — compare variable-density.

How does variable area flow meter work?

Variable area flow meters are simple and versatile devices that operate at a relatively constant pressure drop and measure the flow of liquids, gases, and steam. The position of their float, piston or vane is changed as the increasing flow rate opens a larger flow area to pass the flowing fluid.

Is example of variable area meter?

Rotameters. The simplest example of a variable-area flowmeter is the rotameter, which uses a solid object (called a plummet or float) as a flow indicator, suspended in the midst of a tapered tube: As fluid flows upward through the tube, a pressure differential develops across the plummet.

Why Venturi meter is a variable area meter?

An variable area flow meter is one where the fluid must pass through a restriction whose area increases with flow rate. This stands in contrast to flow meters such as orifice plates and venturi tubes where the cross-sectional area of the flow element remains fixed.

Which meter is also known as insertion meter?

Insertion meter is also called as * Orifice meter.

Which one of the following is used is a variable area meter?

Rotameters are the most widely used type of variable-area (VA) flowmeter. In these devices, the falling and rising action of a float in a tapered tube provides a measure of flow rate .

Where are variable area flow meter used?

Variable area meters are widely used for metering gas but different types are available for a variety of different fluids. A buoyancy correction term is required for liquids and dense fluids.

What do you mean by variable area flow meters discuss the constructional and working details of rotameter?

The Variable Area Flowmeter is an instrument for measuring the flow of liquids and gases in pipelines. It includes a vertical tube through which the fluid flows whose diameter increases from the bottom to the top and a float which can move vertically in the tube. The position of the float is a measure of the flowrate.

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