Research method for ultrasonic suspension type spherical particle acoustic radiation force measurement
A spherical particle and acoustic radiation force technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of low reliability and interference of research results, achieve rapid and intuitive size changes, and simplify complexity Effect
Pending Publication Date: 2021-03-19
HANGZHOU DIANZI UNIV
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[0004] In recent years, with the rapid development of computer technology, the ability of numerical simulation has been greatly improved, but there are still many interference factors in the research process of spherical particles, resulting in low reliability of research results
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[0028] Example: such as Figure 1 to Figure 8 As shown, a research method for measuring the acoustic radiation force of ultrasonically suspended spherical particles includes the following steps:
[0029] Step 1. Based on the perturbation method, in the component, define the acoustic parameters and variable introduction expressions needed to calculate the acoustic problem, which are used to call the integral coupling operator and apply to the entire model of the calculation area; further, step 1 Among them, the calculation model of the perturbation method adopts the pressure-acoustic frequency-domain interface realization model with an ultrasonic frequency of 1MHz, a pressure amplitude of 1bar, and a sound velocity C0 of 1500m / s; further, by defining variables in the component, an intop integral operator is introduced Calculate the parameters of the total force;
[0030] Step 2. Based on the perturbation method, model the suspended matter in the water in the component, constru...
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The invention discloses a research method for ultrasonic suspension type spherical particle acoustic radiation force measurement, which comprises the following steps of: 1, defining acoustic parameters and a variable introduction expression required for calculating an acoustic problem in an assembly on the basis of a perturbation method; 2, modeling the suspended matters in the water in the component, and constructing a geometric calculation area; 3, adding materials from the library, and defining different attributes of regions in the geometrical model of the suspended matters in the water; 4, exciting an ultrasonic standing wave field, and constructing an acoustic environment required for suspended solids in water; and 5, respectively calculating the radiuses of different suspended solids in water and the maximum sound radiation force of the surfaces of the suspended solids, and comparing an analysis scheme. The method is based on a perturbation method, an integral coupling operatoris defined on a computer, the calculated sound pressure and sound velocity are substituted into the operator to obtain an integral, the integral can be used for evaluating the sound radiation force onthe suspended matter, and a certain theory is provided for evaluating the nonlinear second-order force effect by using a linear acoustic method.
Description
technical field [0001] The invention relates to the technical field of ultrasonic levitation and measurement method analysis, in particular to a research method for measuring the acoustic radiation force of ultrasonic levitation spherical particles. Background technique [0002] Ultrasonic levitation is an important non-container treatment technology. Its basic principle is to use the nonlinear effect of high-intensity / high-frequency sound waves to generate acoustic radiation force, overcome the self-gravity of suspended objects, and realize the state of stable suspension of objects. Its advantage is that it has no special requirements on the electromagnetic properties of the sample, has a strong suspension ability, and can create a non-destructive and non-contact operating environment, so it has a wide range of application values in the fields of microgravity simulation, liquid dynamics, and micro-electromechanical systems. . [0003] Acoustic radiation force is an impor...
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IPC IPC(8): G06F30/20G06F119/02G06F119/14
CPCG06F30/20G06F2119/14G06F2119/02
Inventor 吴立群王雅静范亚飞张一帆
Owner HANGZHOU DIANZI UNIV