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Current Circulation and Water Renewal Time in the Enclosed Marine Area of Pagasitikos Basin, Greece

Computational Water, Energy, and Environmental Engineering 2024年第3期13卷 113-132页

作者： George Bousbouras Panagiotis Angelidis Division of Hydraulics Department of Civil Engineering School of Engineering Democritus University of Thrace Kimmeria Greece

Greece boasts an impressive closed coastline stretching across 13,676 km, making it the largest in the Mediterranean basin and one of the largest in the world. Given the significant human activities that take place in coastal areas, understanding the behavior of the sea environment becomes crucial. In this study, we delve into the generation and movement of marine currents as well as the retention time and water age within the waters of Pagasitikos Sea inlet, Greece, through numerical simulation of hydrodynamic characteristics. The main examined points of the understudy region are the area of the port of Volos, the Trikeri channel where the ingress and egress of water from the Gulf takes place and the exchange of seawater through circulation of the Pagasitikos Gulf with the North Evian Gulf. In order to evaluate the results, they were compared with real field measurements and with simulation on a laboratory dummy of the same area. The computational simulation was performed with the ELCOM 2.2 numerical modeling tool and the AEM3D latest version and the main factors simulated are the tide, the consequence that Coriolis force, boundary conditions, the topography and bottom geometry of the bay and the actual meteorological conditions of a whole year.

关键词： fluid dynamics simulation Current Circulation Pagasitikos Basin ELCOM

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DEM-CFD study of the filter cake formation process due to non-spherical particles

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Particuology 2020年第6期18卷 48-57页

作者： Ruturaj Deshpande Sergiy Antonyuk Oleg Iliev Fraunhofer Institute for Industrial Mathematics ITWM KaiserslauternGermany Institute of Particle Process Engineering Technische Universitat KaiserslauternKaiserslauternGermany

The formation of a filter cake during the filtration of a suspension with non-spherical particles is studied using a multi-sphere model in a simulation that couples the discrete element method with computational fluid *** implementation of the coupling with a drag model that considers orientation,sphericity,and the presence of surrounding particles for non-spherical particles is tested for single particles and suspensions by comparing the terminal velocities with empirical *** predicted in the simulations,such as the presence or absence of initial oscillations and changes in the orientation of a particle,are consistent with experimental observations reported in the *** variation in the void fraction of a filter cake with respect to the particle sphericity is obtained and compared with experimental trends reported in the ***,complex interdependencies of the particle sphericity,void fraction,and pressure drop of a filter cake for a wide range of fluid conditions are investigated.

关键词： Filter cake formation Discrete element method-computational fluid dynamics simulation Non-spherical particles

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