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The Coriolis Flow Measuring Principle
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The Coriolis Flow Measuring Principle

Understanding Coriolis Flow Measurement

Overview of Pipeline Transport

  • Pipelines transport a variety of substances daily, including drinking water, fruit juices, oil, gas, and various chemicals.
  • The fluids in pipelines have diverse properties, necessitating different measurement principles for accurate flow assessment.
  • One significant method for measuring flow is based on the Coriolis principle established by physicist Gaspard Gustave de Coriolis over 200 years ago.

Mechanism of Coriolis Flow Measurement

  • Each Coriolis flowmeter contains a tube that oscillates due to an exciter; this oscillation is uniform when there is no fluid flow.
  • When fluid flows through the measuring tube, its inertia causes additional twisting in the oscillation pattern.
  • Sensors at the inlet and outlet detect changes in oscillation direction caused by fluid movement; this change is referred to as "phase shift."

Measuring Density and Flow Simultaneously

  • The deflection of the oscillating tube correlates with flow velocity; higher velocities result in greater deflections.
  • The technology also allows for simultaneous density measurement by registering how often the tube oscillates per second—higher frequency indicates lower density fluids like water compared to denser fluids like honey.
Video description

https://eh.digital/2PzE3tH - Born in 1792, the French mathematician and physicist Gustave Gaspard de Coriolis was the first to describe the force that history has named after him. This force is particularly noticeable in rotating systems. The experiments and simulations shown in this film illustrate what it's all about. Coriolis flow measurement is the simultaneous measurement of mass flow, density, temperature and viscosity. The Coriolis measuring principle is used in a wide range of different branches of industry, such as the life sciences, chemicals, petrochemicals, oil and gas, food, and – no less importantly – in custody transfer applications.