Our group has conducted over a decade of work in the analysis of compressible turbulent mixing. This work is currently supported by an ARC Discovery Project awarded in 2015. We are contributing to pushing forward the state of the art in physical understanding of mixing under extreme conditions, collaboration with multiple institutions worldwide. In addition, the University of Sydney will host the principle Conference in this field in 2016, the International Workshop on the Physics of Compressible Turbulent Mixing.

Inertial Confinement Fusion
Society faces a critical need for a long term energy source. In the long term, Inertial Confinement Fusion (ICF) provides a potential pathway towards utilisation of fusion power as an energy source. In ICF, powerful lasers are employed to rapidly compress a small sphere of deuterium/tritium to the required temperature and pressure to produce fusion. In the long term, such small spheres could be imploded multiple times per second, with each pulse providing a small release of energy. With even a modest conversion rate, a system could provide enough energy to sustain mankind for many centuries. However, fluid instabilities develop and these can prevent fusion being achieved. Research within the FluD group aims to understand how the instabilities develop and transition to turbulence, and thus inform the future design of the fuel capsules, utilising very high resolution computations undertaken on several thousand computational cores. A high-order accurate computation of the planar Richtmyer-Meshkov instability is shown.

Following substantial research into the planar Richtmyer-Meshkov instability, we are now conducting detailed studies of the spherical Richtmyer-Meshkov instability in collaboration with the National Ignition Facility. The second image shown is a cross-section through a developing mixing layer within an ICF capsule.

flyerpic3smallNB50-100dens_t=2.2
Supersonic Jets
Supersonic jets injected through a boundary layer have applications in flow control, aeroacoustic noise manipulation, control actuation and fuel injection in scramjets. This occurs as relatively small high speed jets can significantly modify the structure of a boundary layer, or disrupt the formation of coherent structures. Our research explores the pressure distributions, boundary layer disturbances, shock structures and mixing in sonic jets injected into high speed flows.An Unsteady LES of a jet into supersonic crossflow shown here.
JISC