Identification of gyroscopic forces in the oscillatory system of a Coriolis flowmeter

The phase difference between the oscillations of Coriolis flowmeter (CFM) arms is main experimentally observed parameter during measurements liquid flow rates in pipelines. Usually, steady-state and known dependences rate measured shift are assumed. However, these conditions met with a sufficient accuracy only for homogeneous single-phase flows. For inhomogeneous multiphase flows, correction necessary. This most cases empirical. to improve methodology measurements, more detailed information about flow-tube interactions needed. experimental obtaining such data expensive laborious. On other hand, this can be acquired numerical experiments on CFM virtual prototype. effectively simulate it necessary separate contribution gyroscopic dissipative forces signal (phase shift). problem complicated by fact that not uniformly distributed along length tube, model sufficiently developed yet. In work, were separated 3D finite element modeling tube ideal (inviscid) liquid. We discussed usage simulation results simplified discrete model. It shown magnitude recorded depends both features distribution elastic coupling natural vibrations caused fluid flow. influence shape was investigated. shapes considered displacements sections installation recording coils reaches nearly 5 times. parameters depend change increase decrease one, vice versa. creation based calculations discussed. quantitative estimates integral oscillatory system carried out, allowing one compare arising degree conformity special requirements CFM.