Ultrasonic monitoring device and method for nanoparticle agglomeration of non-Newtonian base fluid fluid

Abstract

The invention discloses a non-Newtonian base liquid fluid nanoparticle agglomeration ultrasonic monitoring device and method, comprising a sample pool and an ultrasonic straight probe, a fluid delivery tank for placing a nano solution is arranged in the sample pool, a reflection plate is arranged in the fluid delivery tank, The ultrasonic straight probe is used to send ultrasonic pulses to the reflection plate in the fluid delivery tank, and receive the reflected wave reflected by the reflection plate. The ultrasonic straight probe is connected to the data acquisition and processing system through the ultrasonic pulse transmitter and receiver. Send it to the data acquisition and processing system for data processing. This method can be used to obtain characteristic parameters such as the average radius of the particle clusters inside the nano-solution and the displacement of the particle clusters per unit time, and to monitor in real time the fractal dimension of the random walk path in the fractal structure of the nano-solution and the distribution of particles with different particle sizes in the whole process. Accurately measure the acoustic attenuation coefficient of the particle phase in the solid-liquid two-phase flow, and realize fast online monitoring.

Description

【Technical field】 [0001] The invention belongs to the technical field of nondestructive testing, and in particular relates to an ultrasonic monitoring device and method for the agglomeration phenomenon of nanoparticles in a non-Newtonian base fluid in a flowing state. 【Background technique】 [0002] At present, the mainstream methods for observing the diffusion behavior of particles in nano-solutions are all based on the principle of laser speckle method. Due to the limited penetration ability of these methods, samples need to be sampled and diluted for measurement, which is not suitable for online measurement at high concentrations. Moreover, the requirements for the optical path equipment are relatively high, there are large errors in the measurement, and the post-processing of the obtained data and images is difficult. In addition, there are many other methods, but the shortcomings of these methods mainly exist in two aspects: one is that they can only be used under static...

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Problems solved by technology

[0002] At present, the mainstream methods for observing the diffusion behavior of particles in nano-solutions are all based on the principle of laser speckle method. Due to the limited penetration ability of these methods, samples need to be sampled and diluted for measurement, which is not suitable for online measurement at high concentrations. Moreover, the requirements for the optical path equipment are relatively high, there are large errors in the measurement, and the post-processing of the obtained data and images is difficult. In addition, there are many other methods, but the shortcomings of these methods mainly exist in two aspects: one is that they can only be used under static conditions. The observation of nanoparticle diffusion in non-Newtonian fluids does not take into account the influence of fluid flow on particle mass transfer. Second, during the observation process, direct contact with the base fluid of non-Newtonian fluids has an unavoidable impact on the observation results

[0003] Nanoparticles in the non-Newtonian fluid flow field have a series of unique basic phenomena such as transport, diffusion, clusters, and interaction with solid boundaries, and contact observation and measurement can easily prompt non-Newtonian fluids to exhibit tube flow shear during transport. Phenomena such as shear thinning, stress relaxation, creep, hysteresis, residual stress, viscoelastic recovery, and slip will inevitably have an important impact on nanoparticles in the flow field. The existing literature includes French Paris Pierre and Professor Michael Baudoin of the Jean Le RondD'Alembert International Joint Laboratory of Marie Curie University and others studied that when the acoustic shock wave propagates in the nanoparticle suspension, the change of the concentration of the suspension and the change of the flow velocity between the particle and the liquid will cause the acoustic scattering field. Changes; Su Mingxu of Shanghai University of Science and Technology, etc. used high-frequency broadband ultrasonic attenuation spectrum to characterize the particle size of nanoparticles; Xu Chunguang and Yan Hongjuan of Beijing Institute of Technology provided an ultrasonic array detection method for high-precision multiphase fluid density and concentration and particle size, etc. There is no monitoring method about how to use an ultrasonic measuring device to measure the fractal dimension of the random walk path of the nanoparticle fractal structure in the non-Newtonian base fluid under the flow state and the weight of the particles with different particle sizes in all the nanoparticles. The present invention is Considering the defects of the above methods, a method that can be widely used in the research and practical application of nano-solutions is proposed.

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