The intent of shielding functions in delayed detached-eddy simulation methods (DDES) is to preserve the wall boundary layers as Reynolds-averaged Navier–Strokes (RANS) mode, avoiding possible modeled stress depletion (MSD) or even unphysical separation due to grid refinement. An entropy function f s is introduced to construct a DDES formulation for the k-ω shear stress transport (SST) model, wh...

This paper presents a computational study of the flow around DTMB 5415 at \(10^\circ \) static drift. Two RANS (Reynolds Averaged Navier-Stokes) turbulence models, as isotropic k-\(\omega SST and non linear anisotropic EARSM (Explicit Algebraic Reynolds Stress Model) one hybrid RANS-LES model, DES (Detached Eddy Simulation) based on \), are used with solver ISIS-CFD. All numerical results compa...

This report identifies mechanisms and techniques for the efficient cooperation among heterogeneous radio access networks (RANs), with focus on the cooperation between the WINNER RAN and legacy RANs (GSM/GPRS/UMTS and IEEE 802.11, 802.16, and DVB). The report has two main parts. The first part is an initial description of cooperation architectures and coupling schemes, later to be analyzed for o...

The requirement that physical quantities not vary with a hybrid LESRANS model’s blending parameter imposes conditions on the computation that lead to better results across LES-RANS transitions. This promises to allow placement of those transitions so that LES is performed only where required by the physics, improving computational efficiency. The approach is applied to separated flow past perio...

The SYSTRAN system (produced by Latsec Incorporated) has been applied in the fo l lowing areas: I ) Pr ivate companies in Canada use i t fo r t rans la t ing engineering documents from English in to French. 2) NASA used i t to communicate with the crews of the Apol lo and Soyuz spaceships, t rans la t ing between Russian and English. 3) The EEC uses i t f o r examining the f e a s i b i l i t y...

Full-scale experimental and computational fluid dynamics (CFD) methods were used to investigate buoyancy-driven single-sided natural ventilation with large openings. Detailed airflow characteristics inside and outside of the room and the ventilation rate were measured. The experimental data were used to validate two CFD models: Reynolds averaged Navier-Stokes equation (RANS) modeling and large ...