Optimization analysis of piezoelectric actuator based on energy transfer

2020 ◽  
Vol 91 (2) ◽  
pp. 025001
Author(s):  
Pingqing Fan ◽  
Jianyu Liu
Keyword(s):  
Energy Transfer ◽  
Piezoelectric Actuator ◽  
Optimization Analysis

The Optimization Analysis on Piezoelectric Micromixer With Modified Tesla Tubes

2011 ◽  
Author(s):  
Xiuhua He ◽  
Hongcai Zhuo ◽  
Xulian Deng ◽  
Jian Wang ◽  
Fu Li
Keyword(s):  
Numerical Analysis ◽  
Piezoelectric Actuator ◽  
Structure Parameters ◽  
Optimization Analysis ◽  
Two Fluids ◽  
Mesh Model ◽  
Perfect Mixing ◽  
Working Principle ◽  
Working Performance ◽  
L1 And L2

With consideration of the good configuration of Tesla tube and its perfect performance used in micromixer and micropump, an integration of micromixer and micropump, a novel type of piezoelectric micromixer has been designed. In order to improve the performance of the micromixer, analysis on structure parameters of the Tesla tube, and the optimization on it is the chief work in this paper. Firstly, a novel type of piezoelectric micromixer with Tesla tubes and piezoelectric actuator has been designed, and its structure and working principle were described. Secondly, the numerical analysis on the micromixer with prearranged parameters was carried out to analyze its pumping and mixing performances. Thirdly, an optimization on the structure to improve its performance was carried out. The values of three main structure parameters of the Tesla tube, K = W1/W3, L1 and L2 were changed to analyze their effects on λ and σ which stand for pumping and mixing performances respectively, then two groups perfect values of those three parameters were selected for optimization. Finally, a perfect design scheme was selected to be structure of mixer; numerical analysis was carried out on it in application of dynamic mesh model. Two fluids arrived perfect mixing after 0.4s with the value of Reynolds number 200, at driven frequency 100Hz, middle displacement amplitude of piezoelectric actuator 15μm. This result demonstrates that, pumping and mixing performances of the piezoelectric micromixer were validated, and its working performance has been improved with the optimization on Tesla tubes, which can be reference for study afterward.

A quantitative approach to inner shell losses

1978 ◽  
Vol 36 (1) ◽  
pp. 526-527 ◽  
Author(s):  
R.D. Leapman ◽  
P. Rez ◽  
D.F. Mayers
Keyword(s):  
Energy Transfer ◽  
Cross Section ◽  
Cross Sections ◽  
Accurate Determination ◽  
Background Intensity ◽  
Core Excitation ◽  
Quantitative Basis ◽  
Cross Section Differential ◽  
Bound Electrons

Microanalysis by EELS has been developing rapidly and though the general form of the spectrum is now understood there is a need to put the technique on a more quantitative basis (1,2). Certain aspects important for microanalysis include: (i) accurate determination of the partial cross sections, σx(α,ΔE) for core excitation when scattering lies inside collection angle a and energy range ΔE above the edge, (ii) behavior of the background intensity due to excitation of less strongly bound electrons, necessary for extrapolation beneath the signal of interest, (iii) departures from the simple hydrogenic K-edge seen in L and M losses, effecting σx and complicating microanalysis. Such problems might be approached empirically but here we describe how computation can elucidate the spectrum shape.The inelastic cross section differential with respect to energy transfer E and momentum transfer q for electrons of energy E0 and velocity v can be written as

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