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In turbulence research and flow applications, turbulence models like RaNS(Reynolds averaged Navier-Stokes) models and LES (Large Eddy Simulation) areused. Both models filter the governing flow equations. Thus a scale separationapproach is introduced for modeling purposes with the large scales simulatedusing a numerical scheme while smaller scales are assumed to be less importantand might be modeled more or less easily. Unfortunately small scales arefrequently of big importance, e.g. in reactive flows, wall bounded flows, orflows with significant Prandtl or Schmidt number effects. Recent alternativesto these standard models are the class of models based on the one-dimensionalturbulence (ODT) idea, like ODTLES. The ability of ODT to capture highlyturbulent flows (recently up to $Re_\tau = 6\times 10^5$) allows ODTLES torealize 3D resolutions basically independent of the turbulent intensity. In twopapers we provide a formal theory and application of an innovative modelingstrategy for highly turbulent flows in domains of moderate complexity: In partI (see Glawe et al. (2015)) a new general filtering approach, called XLES(extended LES), is introduced. Contrary to LES, XLES is based on 2D filteringof the governing equations, whereby additional small scale terms areinterpreted numerically. In this work a new ansatz for the ODTLES model isintroduced as one special approach in the XLES family of models byincorporating the ODT model into XLES. The ODT model introduces microstructuresnot captured by the XLES filtered equations. To illustrate the ODTLES modelcapabilities, turbulent channel and duct flows up to friction Reynolds number$Re_\tau = 10000$ are studied.

XLES Part II: From Extended Large Eddy Simulation to ODTLES