Temporal behavior of a low-dimensional dynamical system proposed for construction of subgrid-scale models in LES of scalar transport J. M. MCDONOUGH University of Kentucky, J. C. HOLLOWAY University of California, Los Angeles, M. G. Chong, PowerLab, Irwindale, CA Temporal behavior of a low-dimensional discrete dynamical system (DDS) proposed as part of a subgrid-scale (SGS) model for LES of scalar transport is examined. Following a brief review of derivation of the DDS from the Navier–Stokes equations together with an equation for scalar transport via application of the Galerkin procedure, representative bifurcation diagrams are presented to emphasize the wide range of temporal behaviors and bifurcation sequences accessible with this system. Direct comparisons between time series generated with this DDS and those for velocity and temperature available in the extant literature are then provided to demonstrate ability of the DDS to mimic a broad range of physical and DNS behaviors, including replication of known bifurcation sequences and qualitative appearance of time series. Finally, statistical properties of the time series will be reported to show that the low-dimensional dynamical system being studied is capable of reproducing some, but not all, of the quantitative observations from turbulent scalar transport. In particular, flatness, skewness and low-order structure function results will be provided, along with the usual power spectra and probability density functions.