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Professor J.J. Gottlieb
University of Toronto
Institute for Aerospace Studies
4925 Dufferin St., Ontario, Canada M3H 5T6
Phone: +1-416-667-7740
Fax: +1-416-667-7799
Email: gottlieb (at_sign) utias.utoronto.ca |
Professor
Gottlieb's research is primarily in the fields of gasdynamics, fluid
dynamics, and thermodynamics, with a special interest in shock and
expansion wave phenomena in gases, liquids, and solids. This research
involves analytical, numerical and computational methods, along with
the modelling of complex physical processes to provide an enhancement
in our understanding of the physical processes and thereby facilitate
solutions to scientific and engineering problems with creativity and
elegance when possible, rather than simply utilizing brute-force
computational methods.
Past
applications of Gottlieb's research with graduate students include
solid-propellant rocket motors, projectile launchers, supersonic and
hypersonic wind tunnels, supersonic and hypersonic flight, shock
tubes, blast simulators, and chemical explosions from past and new
energetic materials. Although analytical and numerical solutions are
normally the goals of the research, modern computational fluid
dynamics is used frequently as a tool. Current research emphasis is
involved with (a) gas-particle flows in solid-propellant rocket
motors, (b) shock-wave reflection from rigid surfaces aimed at
solving two 60-year-old von Neumann paradoxes, (c) filling vehicle
fuel tanks with gaseous hydrogen or natural gas and predicting the
resulting fuel temperature rise in an unknown volume of the vehicle
tank, (d) inexpensive measurement techniques for the determination of
supersonic flow properties (pressure, temperature, Mach number) and
importantly the injectant fuel mass fraction for tubulent fuel-air
mixing flows in scramjet propulsion engines, and (e) improved
numerical methods of computing complex chemical equilibrium mixture
compositions for the combustion of energetic materials with hundreds
of gaseous and condensed species as reaction products and
simultaneously including the melting of solid species.
Gottlieb's
research on rocket motors, shock-wave reflections and chemical
equilibrium stem partly from military applications at the Defence
Research and Development Canada (Suffield and Valcartier), the
research on the gaseous fueling of vehicle tanks applys to future
fueling service stations in the coming hydrogen economy, related to
new companies like FTI International in Toronto, and the research on
supersonic flow measurements is connected directly to future civilian
and military hypersonic flight and the related studies at the NASA
Glenn Research Center in the United States.