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Title: Effect Of Finite Medium Speed Of Sound On Coriolis Massflowmeters
Author: m. Anklin, G. Eckert, S. Sorokin, A. Wenger
Source: Flomeko 2000
Year Published: 2000
Abstract: A theory is presented for the interaction between a vibrating tube and the enclosed flowing fluid with finite speed of sound. From this the influence of the speed of sound on the massflow measurements is derived. This model is valid for compressible mediums and for flow velocities which may be quite high ( 100m/s) but still subsonic. Such velocities can easily be reached in a Coriolis mass flowmeter (CMF) for gas application. The exact theoretical calculation is complex and the results can not be written in a simple one line equation. Nevertheless, we approximate the exact formula to estimate the deviation between true mass flow and the CMF reading. This deviation can be described with mainly two terms:

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