In the Multiphase Flow Laboratory heat and mass transfer in multiphase flow, cooling of electronic chips and turbulence are studied.
The Multiphase Flow research group includes ten graduate students and six “new” immigrant scientists. The main research topics are boiling, turbulence and thermal management of electronic equipment.
Boiling: Research is conducted on pool and flow boiling of pure water and water-surfactants solutions. The main contributions were in the area of boiling in micro-channels and capillary tubes, and in boiling of environmentally safe surfactant solutions. It was shown that surfactants can enhance boiling, and reduce the excess wall temperature. These could be very attractive for desalination and for thermal management of electronic equipment.
Turbulence: Direct numerical simulation (DNS) of turbulent flow of pure water, and water containing a particulate phase is investigated. In particular, the interaction between the particles and the turbulence of the carrying fluid and the effect of the particles on the heat transfer from the wall is sought. The turbulent structures in the wall region of a flume were investigated by means of DNS and, experimentally, by means of three-dimensional Particle Image Velocimetry (PIV).
Thermal management of electronic and optical equipment: Cooling of computer chips, laser diodes etc., by means of single- and two-phase flow of fluid in micro-channels is conducted. This research requires high-speed Infrared Radiometers (IR), high-speed video and optical microscopes. It is also carried out for a consortium of optical communications equipment vendors. Lately, the Lab together with the Soreq Nuclear Center, have been actively involved in developing a window for a high power accelerator . The lab is also involved, with the Intel Corp., in developing novel cooling methods for high power electronic chips.
During the last four years, we authored some fifty papers, gave many keynote lectures and made numerous presentations at conferences. We also supported 16 graduate students, a number of Post-Docs and visitors from other countries.
Our work on flow in micro-channels is described in a recent book by L.P.Yarin. A.Mosyak and G.Hetsroni “Fluid Flow, Heat Transfer and Boiling in Micro-Channels,” Springer Verlag