A SCALABLE MODEL FOR COMPLEX FLOWS

We describe a scalable parallel algorithm for numerical simulations of turbulent, radiative, magnetized, and reactive fluid + particle syste ms on message-passing distributed-memory computers. Accurate simulatio n of such complex flows has applications in engine combustion, industr ial pulverized coal burners, astrophysics, inertial confinement fusion , nuclear systems, and many other strategically and economically impor tant areas. Our algorithm has been developed based on a widely-used co mbustion code KIVA-3, a plasma and radiation hydrodynamics code R-MHD, a classical particle dynamics code CMDT, and a discrete ordinates par ticle transport code TORT. The development is being done on the Intel Paragon with PVM and MPI extensions. We report high levels of parallel efficiency and scalability (up to 1024 nodes) for a baseline engine t est case, using our current message-passing reactive and turbulent flo w code. The three-dimensional extension of radiation magnetohydrodynam ics component is still being worked at and we hope to report further p rogress in the future.