Our study is based on a great number of CFD (computational fluid dynamics) simulations to evaluate wind comfort at the pedestrian level. This article explains the method used to validate our CFD simulations carried out with the FLUENT software. This validation is based on a comparison between our simulated results and wind tunnel tests for three different building contexts: a single building, t...

Flow and traffic-originated pollutant dispersion in an urban street canyon with avenue-like tree planting have been studied by means of wind tunnel and CFD investigations. The study comprises tree planting of different crown porosity, planted in two rows within a canyon of street width to building height ratio W/H = 2 and street length to building height ratio L/H = 10 exposed to a perpendicula...

Many chemical reactions are carried out using stirred tanks, and the efficiency of such systems depends on the quality of mixing, which has been a subject of research for many years. For solid–liquid mixing, traditionally the research efforts were geared towards determining mixing features such as off-bottom solid suspension using experimental techniques. In a few studies that focused on the de...

This report presents the results of studies on emissions dispersion from an aircraft engine during the take-off phase. Two types of wind configuration were applied to a single and a double jet engine. Results highlight the influence of different parameters on the plume dispersion pattern, and confirm that CFD is an appropriate tool for source dynamics simulations. ALAQS Comparison of CFD and La...

A graphical framework is used for statistical analysis of the results from an extensive Nversion test of a collection of Reynolds-averaged Navier-Stokes computational fluid dynamics codes. The solutions were obtained by code developers and users from North America, Europe, Asia, and South America using both common and custom grid sequencees as well as multiple turbulence models for the June 201...

Wind catchers are traditional natural ventilation systems attached to buildings in order to ventilate the indoor air. The most common type of wind catcher is four sided one which is capable to catch wind in all directions. CFD simulation is the perfect way to evaluate the wind catcher performance. The accuracy of CFD results is the issue of concern, so sensitivity analyses is crucial to find ou...

Numerous CFD studies have been performed on the motivation to elucidate the role of hemodynamic forces in the development of atherosclerosis in the coronary arteries and the carotid bifurcation artery. In order to improve CFD predictions, and to consider CFD as a clinical diagnostic or treatment planning tool, there is a need to ensure its accuracy and reliability through a systematic approach ...

In CFD-DEM (computational fluid dynamics-discrete element method) simulations particles are considered Lagrangian point particles. The details of the flow near particle surface therefore not fully resolved. When scale is larger than resolved scale, coupling between CFD model and DEM critical. An effective scheme should minimize risk artificial influences on results from choices numerical parame...