Vorticity dynamics past an inclined elliptical cylinder at different re numbers: from periodic to chaotic solutions

Vortex methods offer an alternative way for the numerical simulation of problems regarding incompressible flows. In the present paper, a Vortex Particle Method (VPM) is combined with a Boundary Element Method for the study of viscous incompressible planar flow around solid bodies. The method is based on the viscous splitting approach of Chorin [3] for the Navier-Stokes equations in vorticity-velocity formulation and consists of an advection step followed by a diffusion step. The evaluation of the advection velocity exploits the Helmholtz- Hodge Decomposition (HHD), while the no–slip condition is enforced by an indirect boundary integral equation. In order to deal with the problem of disordered spacial distribution of particles, caused by the advection along the Lagrangian trajectories [1], in the present method the particles are redistributed on a Regular Point distribution (RPD) during the diffusive step. The RPDs close to the solid bodies are generated through a packing algorithm developed by [4], thanks to which the use of a mesh generator is avoided. The developed Vortex Particle Method has been called Diffused Vortex Hydrodynamics (DVH) and it is implemented within a completely meshless framework, hence, neither advection nor diffusion requires topological connection of the computational nodes. The DVH has been extensively validated in the past years (see e.g. [8]) and is used in the present article to study the vorticity evolution past an inclined elliptical cylinder while increasing the Reynolds number from 200 up to 10,000 in a 2D framework. The flow evolution is characterized by a periodic behaviour for the lower Reynolds numbers which is gradually lost to give its the place to a chaotic behaviour

Use of Standardized Patient Scenarios to Train Medical Assistants in an Ambulatory Rehabilitation Medicine Clinic

Objectives: To improve the efficiency of our outpatient Rehabilitation Medicine clinic without sacrificing high value/quality patient care. To clarify the responsibilities of the MA and identify areas of redundancy in the rooming process. To demonstrate the utility of in-situ simulation for MA training. To reduce the time it takes for MAs to complete all assigned tasks to 10 minutes or less per encounter in at least 50% of patient encounters within two months from the time of intervention. To potentially highlight other areas in which to improve clinic efficiency and overall patient satisfaction (e.g. front desk registration process, resident and attending physician encounters, clinic and exam room accessibility).https://jdc.jefferson.edu/patientsafetyposters/1051/thumbnail.jp

Promising primers for detection of phytoplasma causing coconut lethal yellowing disease in Mozambique

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