Surface acoustic wave driven micro-flows: Flow control and transport of finite size particles

表面声波驱动的微流：有限尺寸颗粒的流动控制和传输

• 批准号: 24122039
• 负责人: Professor Dr. Peter Hänggi
• 金额: --
• 依托单位: Lehrstuhl für Theoretische Physik I
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/24122039?language=en
• 关键词: Surface; acoustic; wave; driven; micro

The manipulation of small amounts of fluids and a detailed control of the flow patterns within the fluid are preconditions for a successful processing of biological and chemical materials on microfluidic devices known as labs-on-a-chip. Acoustic streaming caused by surface acoustic waves on piezoelectric substrates has proved to be an efficient and versatile method to generate flows in small fluid volumes. In contrast to well investigated pressure driven Poiseuille type shear flows in channels, the surface acoustic wave generated stream patterns are more complex and typically display one or more vortices. It is the goal of this project to utilize and improve these complex flow patterns and to investigate the transport properties of extended particles in such flow fields.

对少量流体的操纵和对流体内流动模式的详细控制是在称为芯片实验室的微流体设备上成功处理生物和化学材料的先决条件。压电基板上的表面声波引起的声流已被证明是一种在小流体体积中产生流动的有效且通用的方法。与深入研究的通道中压力驱动的泊肃叶型剪切流相比，表面声波生成的流模式更加复杂，并且通常显示一个或多个涡流。该项目的目标是利用和改进这些复杂的流动模式，并研究扩展颗粒在此类流场中的传输特性。