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首页> 外文会议>Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US) >THE NDE OF COMPLEX LIQUIDS CONTAINING SUSPENDED PARTICLES
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THE NDE OF COMPLEX LIQUIDS CONTAINING SUSPENDED PARTICLES

机译：含悬浮颗粒的复杂液体的无损检测

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摘要

Many products of commercial significance exist as suspensions of particles in a liquid or will have consisted as such as suspension at a stage during manufacture; the particles may be solid or liquid. It is necessary to determine the physical state of such suspensions both in the development laboratory and for the purposes of quality and process control at plant level. Reliable estimates are required of the size distribution and concentration of the dispersed phase, as well as indications of flocculation, and network formation. Dynamic measures may be required in support of reaction processes such as crystallization. Techniques that can be used for the characterisation of suspensions are optical scattering or turbidity tests, sedimentation rate tests, ionizing radiation, electrical tests, electroacoustic measurements, and acoustic (ultrasonic) methods alone. Ultrasonic methods have the advantages that they can be used on mixtures that are too opaque for optical techniques, and that they can be incorporated into robust and low cost instrumentation. This paper gives a brief overview of the physics of the interactions of ultrasonic waves with particulate suspensions and a brief review of measurement methods and errors. Recent results that show agreement or otherwise between theory and experiment are given for silica sols. Examples are also given of the use of ultrasound to track flocculation in an aqueous emulsion, and to track a crystallization reaction.
机译：许多具有商业意义的产品都以颗粒在液体中的悬浮液形式存在，或者在生产过程的某个阶段就已经形成了悬浮液。颗粒可以是固体或液体。必须在开发实验室中以及出于工厂级质量和过程控制的目的，确定此类悬浮液的物理状态。需要对分散相的大小分布和浓度以及絮凝和网络形成的迹象进行可靠的估算。可能需要采取动态措施来支持反应过程，例如结晶。可用于表征悬浮液的技术包括光散射或浊度测试，沉降速率测试，电离辐射，电学测试，电声测量和声学（超声波）方法。超声波方法的优点是，它们可用于对于光学技术而言太不透明的混合物，并且可将其合并到坚固且低成本的仪器中。本文简要概述了超声波与微粒悬浮液相互作用的物理原理，并简要介绍了测量方法和误差。对于二氧化硅溶胶，最近的结果表明理论与实验之间是否一致。还给出了使用超声波跟踪水性乳液中的絮凝并跟踪结晶反应的实例。

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