S. A. Orszag

Bio: S. A. Orszag is an academic researcher. The author has contributed to research in topics: Shear flow & Reynolds stress. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Numerical simulation of shear flows over wavy boundaries

Abstract: The full time-dependent two dimensional Navier-Stokes equations are solved using spectral methods to achieve high spatial accuracy and high order time-splitting methods together with conformal mapping methods to allow simulation of flow over steep waves, including general turbulent Reynolds stresses The programs are used to study the properties of laminar and turbulent flow over a flat plate and in various wavy geometries Results are compared with both available theory and experiment For laminar flow, good agreement is achieved For turbulent flow, the agreement is less satisfactory and may be explained by the simplified turbulent modelling use in the calculations

Physical effects of vegetation on wind-blown sand in the coastal environments of florida

Abstract: One and two-dimensional, second order turbulence plant canopy flow models were developed for the purpose of estimating the effect of coastal vegetation on wind blown sand transport. The computer program that solves the governing differential equations uses measured leaf area density profiles and drag coefficients for crop plants similar in shape and size to the more common coastal vegetation in Florida. (Document has 57 pages.)