Contact mechanisms of particle systems in ultrasound agitation

超声搅拌中颗粒系统的接触机制

• 批准号: 169966694
• 负责人: Professor Dr.-Ing. Udo Fritsching
• 金额: --
• 依托单位: Abteilung Verfahrenstechnik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/169966694?language=en
• 关键词: Contact; mechanisms; particle; systems; ultrasound

Modelling the contact and adhesion mechanisms of disperse systems is a fundamental need for the simulation of particle processes e.g. for specific development of facilities or for the adjustment of process conditions while treating and conditioning highly disperse powders. Aim of this project is the investigation of particle-particle-interactions in time dependent, oscillation induced particle contact in ultrasound agitated particle systems. The aim of the considerations is the mechanism based description of particle-particle-interactions in (ultra)sound agitated (and hence, gas induced oscillating) disperse systems and the resulting modelling and simulation of processes with dispersed phases. The particulate contact and binding mechanisms as well as their dynamic behaviour will be derived for various primary particle and agglomerate structures for defined process and environmental conditions. Besides the control of adequate acoustic parameters (frequency, intensity, a.o.), the adhesion relevant atmospheric parameters (e.g. humidity) may be set specifically to be able to parametrically describe the contact and adhesion mechanisms. The experimental investigations will be described by direct numerical simulation of the fluid and particle behaviour qualitatively as well as quantitatively.

对分散体系的接触和粘附机制进行建模是颗粒工艺模拟的基本需求，例如，在处理和调节高度分散的粉末时，对设备的特定开发或工艺条件的调整。本计画的目的是研究在超音波搅拌粒子系统中，时间相依的、振荡诱发的粒子接触中的粒子-粒子-交互作用。考虑的目的是基于机制的描述（超）声搅拌（因此，气体引起的振荡）分散系统中的颗粒-颗粒相互作用和由此产生的建模和模拟过程中的分散相。颗粒接触和结合机制，以及它们的动态行为将被推导出各种初级颗粒和团聚体结构的定义过程和环境条件。除了控制适当的声学参数（频率、强度、a.o.）之外，可以具体地设置与粘附相关的大气参数（例如湿度），以能够参数化地描述接触和粘附机制。实验研究将描述的流体和颗粒的行为定性和定量的直接数值模拟。