The swirl flow plays a central role in combustion systems. It is important to capture all phenomena associated with it. In particular, lean partially premixed combustion in gas turbine combustion chamber is often associated with hydrodynamic instabilities, known as processing vortex core (PVC). Therefore an unconfined swirl flow with a precessing vortex core is being studied in presented work b...

A new Reynolds stress anisotropy closure that includes nonlocal and nonequilibrium effects in turbulent flows has been obtained from a recently proposed nonlocal anisotropy formulation. This formulation is based on a new nonlocal derivation of the rapid pressurestrain correlation, which rigorously accounts for nonlocal effects on the anisotropy due to spatial variations in the mean velocity gra...

Numerical analysis of flow characteristics and separation efficiency in a high-efficiency cyclone has been performed. Several models based on the experimental observation for a design purpose were proposed. However, the model is only estimated the cyclone's performance under the limited environments; it is difficult to obtain a general model for all types of cyclones. The purpose of this study ...

BACKGROUND The changes of hemodynamics and drug concentration distribution caused by the implantation of drug eluting stents (DESs) in curved vessels have significant effects on In-Stent Restenosis. METHODS A 3D virtual stent with 90° curvature was modelled and the distribution of wall shear stress (WSS) and drug concentration in this model were numerically studied at Reynolds numbers of 200,...

Direct simulations of spherical particle motion in Bingham liquids Prashant, J. J. Derksen Chemical & Materials Engineering Department, University of Alberta, Edmonton, Alberta, T6G 2G6 Canada Submitted to Computers & Chemical Engineering, October 2009 Accepted: September 2010 Abstract The present work deals with the development of a direct simulation strategy for solving the motion of spherica...

The properties of the mean momentum balance in turbulent boundary layer, pipe and channel flows are explored both experimentally and theoretically. Available highquality data reveal a dynamically relevant four-layer description that is a departure from the mean profile four-layer description traditionally and nearly universally ascribed to turbulent wall flows. Each of the four layers is charac...

Three Reynolds-Stress Models (RSMs) have been benchmarked on industrial configurations with aeronautical applications. The models are first compared a zero-pressure-gradient boundary layer, which highlights the differences in near-wall approaches of models. Results then analyzed for Skåre & Krogstad adverse-pressure-gradient layer and Common Research Model (CRM) aircraft two Reynolds numbers. B...