Dissertation > Industrial Technology > Machinery and Instrument Industry > Pump > A variety of purposes

Vibration Analysis and Flow Field Numerical Calculation of the Piezoelectric Valve-Less Micropump

Author YangLinJie
Tutor GaoDianRong;HanDeCai
School Yanshan University
Course Mechanical and Electronic Engineering
Keywords MEMS Microfluidic Valveless micro-pump Piezoelectric drive Diffusion tube / shrink tube Finite Element
Type Master's thesis
Year 2005
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The Microfluidics Technology (Microfluidics Technology) refers to microscopic size under control , operation and testing of complex fluid technology in microelectronics , micro- mechanical , bio-engineering and nano technology based on the development of a new cross-disciplinary , including micro- pump is one of the basic components of the microfluidic system . In this thesis, the piezoelectric drive valve micro- pumps theoretical analysis , the establishment of a diffusion tube / shrink tube model the basic equations and piezoelectric-driven micro-pump membrane deformable model , calculated by ANSYS software to simulate the micro- pump diaphragm deformation and valveless flow of micro - pump three-dimensional flow field . Initial establishment of the diffusion / contraction of the mathematical model of the structure of the flow channel to discuss the principle of selecting parameters of the structure and flow damping coefficient calculated . Speed ??and pressure of the finite element analysis of diffusion through the the ANSYS / FLOTRAN CFD module / contraction flow channel draw fluid flow channel distribution , as well as the structural parameters of the impact of changes in the fluid flow convection Road curve ; establish a piezoelectric-driven micro - pump membrane finite element analysis model of the piece , the direct coupling method simulation analysis of the micro- pump diaphragm driven piezoelectric layer deformation and speed changes , come to the deformation of the membrane thickness , shape and piezoelectric drive voltage micro-pump diaphragm affect the curve , and the piezoelectric-driven micro - pump diaphragm modal analysis to calculate the natural frequency of the micro - pump diaphragm ; indirect coupling using ANSYS finite element fluid-structure analysis to establish valveless micro - pump three-dimensional flow field model obtained pump chamber pressure cloud images and the velocity vectors , and thus a more comprehensive understanding of the flow characteristics of valveless micro- pump system . Research results -driven piezoelectric valve micro pump design provides a theoretical basis for the rationalization of the structure design of the micro- pump has important reference value .

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