title: Autonomic closure for turbulence simulations.
abstract: A new approach to turbulence closure is presented that eliminates the need to specify a predefined turbulence model and instead provides for fully adaptive, self-optimizing, autonomic closures. The closure is autonomic in the sense that the simulation itself determines the optimal local, instantaneous relation between any unclosed term and resolved quantities through the solution of a nonlinear, nonparametric system identification problem. This nonparametric approach allows the autonomic closure to freely adapt to varying nonlinear, nonlocal, nonequilibrium, and other turbulence characteristics in the flow. Even a simple implementation of the autonomic closure for large eddy simulations provides remarkably more accurate results in a priori tests than do dynamic versions of traditional prescribed closures.
authors.affiliation: Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, USA.
authors.forename: Ryan N
authors.initials: RN
authors.lastname: King
authors.affiliation: Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, USA.
authors.forename: Peter E
authors.initials: PE
authors.lastname: Hamlington
authors.affiliation: School for Engineering of Matter, Transport, & Energy, Arizona State University, Tempe, Arizona 85287, USA.
authors.forename: Werner J A
authors.initials: WJ
authors.lastname: Dahm