  We perform the first detailed three-dimensional simulation of low Mach number
convection preceding thermonuclear ignition in a mixed H/He X-ray burst. Our
simulations include a moderate-sized, approximate network that captures
hydrogen and helium burning up through rp-process breakout. We look in detail
at the difference between two- and three-dimensional convective fields,
including the details of the turbulent convection.

High Energy Astrophysical Phenomena