Simulation of Coriolis flow meter in Ansys Fluent

Coriolis flow meter in Ansys Fluent

In this tutorial, we provide guidelines for modeling and simulation of Coriolis flow meter in Ansys Fluent software. Fluid flow
causes a phase shift between the inlet and outlet arms of the meter which is used to measure mass flow rate.

You will also learn how to do the following through this tutorial:

  •  Set up of the modal analysis for the flow meter
    Set up of the Transient Structural case for the flow meter piping
    Set up of the transient Fluent case including coupling effects
    Set up and solution of the coupled flow case

A Coriolis meter is based on the principles of motion mechanics. When the process fluid enters the sensor, it is split. During operation, a drive coil stimulates the tubes to oscillate in opposition at the natural resonant frequency. As the tubes oscillate, the voltage generated from each pickoff creates a sine wave. This indicates the motion of one tube relative to the other. The time delay between the two sine waves is called Delta-T, which is directly proportional to the mass flow rate.

In a Coriolis mass flow meter fluid passes through a U-shaped or similar tube. A forcing displacement is
applied to the centre of the U-bend. The elbows upstream and downstream of the centre are displaced
accordingly, but there is a phase shift between the upstream and downstream sides which is related to
the fluid mass flow through the tubes.

Coriolis mass flowmeters measure the force resulting from the acceleration caused by mass moving toward (or away from) a center of rotation. This effect can be experienced when riding a merry-go-round, where moving toward the center will cause a person to have to “lean into” the rotation so as to maintain balance.

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