2012 Spring Physics Colloquium Series: Dr. David Staack

DateFebruary 22, 2012Time4:00 - 5:00 pm
LocationBaylor Sciences Building, Room E.125
Description
David Staack, Ph.D.
Assistant Professor, Texas A & M University
Mechanical Engineering Department

Microplasmas in Liquids

Microplasmas, ranging from 120 m in diameter, can be generated in electrolyte and dielectric liquids through the controlled application of energy to submerged electrodes. In nanosecond duration pulses ranging in energy from micro-joules to joules, the phase change to a plasma releases this energy in the form of shockwaves, heating, light emission and chemical species generation. The energy dissipation occurs in a highly localized, time and energy dependant manner. This talk will address fundamental concerns about bubble formation during discharge initiation and maintaining non-equilibrium plasma states. Experimental diagnostics of the micro-plasmas including electrical characteristics, visualization and optical emission spectroscopy are used to obtain a better understanding of the processes. Production of plasma in liquid can be controlled to provide both non-thermal and thermal mechanisms for chemically modifying water, oil and other liquids. Some applied results to hydrocarbon processing and material processing will also be highlighted.

For more information, please contact: Dr. Anzhong Wang x 2276.

PublisherDepartment of Physics
vCalDownload this event