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On large scale CFD-DEM simulation for gas-liquid-solid,three-phase flows

Particuology 2021年第6期19卷 2-15页

作者： kimiaki washino Ei L.Chan Tetsushi Kaji Yoshiaki Matsuno Toshitsugu Tanaka Department of Mechanical Engineering Osaka UniversitySuitaOsaka 565-0871Japan

Particulate flows in a mixture of gas and liquid,***-liquid-solid three-phase flows,are frequently encountered both in nature and *** such flows,complex interactions between multiple phases,***-particle interactions,fluid-particle interactions and interfacial interactions(such as surface tension and particle wetting),play a crucial *** literature,simulations of three-phase flows are sometimes performed by incorporating interface capturing methods(*** method)into the CFD-DEM coupling ***,it is practically impossible to perform large(industrial)scale simulation because of the high computational *** of the strategies often employed to reduce the computational cost in CFD-DEM is to upscale particle size,which is applied mainly to particle single-phase and fluid-solid two-phase *** present work is focused on the scaled-up particle model for gas-liquid-solid three-phase *** interaction forces between multiple phases are scaled using the general criteria derived from the continuum assumption of particulate flow.A colour function based interface-capturing method with improved interface smoothness is developed,and the diffusion based coarse graining is employed to ensure sufficient space resolution in CFD even when particle size is *** is shown that the model developed is capable of predicting the both particles and fluid behaviour in the original system.

关键词： CFD-DEM Three-phase flow Scaled-up particle Surface tension and wetting

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Anterior mediastinal abscess diagnosed in a young sumo wrestler after closed blunt chest trauma

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Chinese Journal of Traumatology 2015年第6期18卷 360-362页

作者： Tatsuro Sassa Ken-ichiro Kobayashi Masayuki Ota Takuya washino Mayu Hikone Naoya Sakamoto Sentaro Iwabuchi Mizuto Otsuji Kenji Ohnishi Department of Infectious Disease Tokyo Metropolitan Bokutoh General Hospital 4-23-15 kohtohbashi Sumida City Tokyo 130-0022 Japan

Most mediastinal abscesses result from infections after thoracotomy, esophageal perforation or pene- trating chest trauma. This disease is rarely caused by closed blunt chest trauma. All previously reported such cases after closed blunt chest trauma presented with hematoma and sternal osteomyelitis resulting from sternal fracture. Here we report a 15-year-old sumo wrestler who presented with an anterior mediastinal abscess without any mediastinal fracture. The mediastinal abscess resulted from the he- matogenous spread of Staphylococcus aureus to a hematoma that might have been caused by a closed blunt chest trauma incurred during sumo wrestling exercises.

关键词： Mediastinal abscess Staphylococcus aureus Sumo wrestler Chest trauma

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