A Spectral Domain Decomposition Method and Its Application to the Simulation of Shear-Stratified Turbulence

Environmental flows are replete with situations where shear and stratification coexist, and many attempts have been made to understand the generation and evolution of turbulence in stratified shear flows. Early studies have been made using laboratory simulations (Webster [32] and Rohr et al. [29]), but with increasing computer power, direct numerical simulations (DNS) and large eddy simulations (LES) have become powerful tools for studies of shear-stratified turbulence. There are many reports with numerical approaches, most of them using DNS (Gerz et al. [12], Holt et al. [14], Jacobitz et al. [16] and Werne et al. [33]) and others using LES (Kaltenbach et al. [17]).