Finite Element Analysis of Omega Type Coriolis Mass Flow Sensor (CMFS)for Evaluation of Fundamental Frequency and Mode Shape

Abstract

-This research article highlights Omega type Coriolis Mass Flow Sensor (CMFS) used for measuring direct mass flow. CMFS works on the principle of Coriolis effect. In this research article omegatype, CMFS has been investigated for evaluatingresonant frequency. Modelling of CMFS can be split into two domains-structural and fluid. The omega shaped tube, forming the structural part and the fluid flowing through it, being modeled as a string and composing the fluid domain.Omega tube is clamped at both ends and vibrates in the x–z plane on its fundamental natural frequency. Large tube deformations are specifically countered to be absent in order to enable convergence of the solution. The measuring characteristic of the mass flow rate is phase shift, which is experienced in the motion of sensing points that are located symmetrically at the two limbs of the tube.Frequency response of omega type CMFS resonant frequency with water and without water was compared. Simulation of CMFS has been done using Ansys 14.5.Geometric properties of the measuring omega shaped tube are its tube height, internal diameter and external diameter.Solid Edge, Pro-E was used for modelling of omega shaped tube. The tube material is taken to be the same of that used in experimentation – commercially available aluminium, copper and mild Steel.Copper is selected as omega tube material and water as working fluid.