DFG Priority Program SPP 1164
Nano- & Microfluidics:
Bridging the Gap between
Molecular Motion and Continuum Flow
Surface acoustic wave driven micro-flows: Flow control and transport of finite size particles
| Project Leader: | Prof. Dr. Peter Hänggi Universität Augsburg Lehrstuhl für Theoretische Physik I Augsburg |
| together with: | Prof. Dr. Achim Wixforth Universität Augsburg Lehrstuhl für Experimentalphysik I Augsburg |
Summary
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.