Abstract: The test-field model for isotropic turbulence is used to examine the effective eddy viscosity acting on wavenumbers <km due to interactions with subgrid-scale wavenumbers, defined as wavenumbers >km. In both two and three ...

Abstract: Computer simulators are made of the growth of the difference-velocity field for pairs of realizations of isotropic, three-dimensional turbulence at Reynolds number R&lambda≈40. The simulations involve full-scale integration ...