Abstract
The multi-physics coupling study is carried out by considering the fluctuation of the interphase dynamic interface and its flow characteristics as well as the mechanical properties of the solid structure of the pipeline. By capturing the dynamic interface between gas and liquid, calculating its flow characteristics, combined with the time-history displacement and amplitude of the characteristic monitoring point and the axis of the pipeline, the FIV response characteristics of the basin in the S-type conveying pipe are analyzed. The results show that the dominant area of single gas phase or single liquid phase is not easy to deform and vibrate. The transition and persistence of the flow pattern in the mixed turbulent flow area and the weak regular fluctuation of the flow field in the pipe stimulate the pipe wall to cause stress reaction, leading to the time-history vibration with great difference in the pipe.
Highlights
As a classical subject with parametric dynamic systems, the study of dynamic characteristics of divergence instability, single-mode and coupled-mode flutter, bifurcation and chaos in the fluid conveying pipes is the most attractive and practical issue in the field of fluid-solid coupling research that is really related to industrial safety and development
Hydrodynamic force that is applied on the structures, pipes and various objects will produce destructive vibrations, and may lead to the acoustic and noise problems in the industrial machinery, which is known as Flow-Induced Vibration (FIV)
Based on the finite element method of partial differential equation, COMSOL.Multiphysics-5.3a platform was used in coupling calculation of twophase dynamic interface capture equation, multi-phase basin motion equation and multiphysics field of pipeline solid-structure mechanics equation
Summary
As a classical subject with parametric dynamic systems, the study of dynamic characteristics of divergence instability, single-mode and coupled-mode flutter, bifurcation and chaos in the fluid conveying pipes is the most attractive and practical issue in the field of fluid-solid coupling research that is really related to industrial safety and development. Hydrodynamic force that is applied on the structures, pipes and various objects will produce destructive vibrations, and may lead to the acoustic and noise problems in the industrial machinery, which is known as Flow-Induced Vibration (FIV). Mature research methods have been developed with in-depth research results obtained for the cylindrical vibration of different shapes, the multi-degree-offreedom column flutter, the vibration characteristics of the platy structure and other related issues under the high Reynolds number. Study on Characteristics of Flow-induced Vibration (FIV) Induced by
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