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Numerical Calculation Model for MR Fluid Behavior in Magnetic Field
Get PDFRecently, Magnetorheological (MR) fluids have been attracting attention as a type of functional fluid. MR fluids have the property that the ferromagnetic particles form chain-like clusters and change their viscosity significantly in response to the applied magnetic field strength. MR fluids are expected to be applied to vibration control systems such as dampers, clutches, brakes and so on because of their ability to change viscosity electrically, reversibly, and continuously on the order of milliseconds. However, the mechanism is complex, and experimental approaches are the most common, requiring a large number of experiments on actual equipment.
Therefore, it is expected to analyze the behavior of magnetic particles inside the fluids by numerical simulation and clarify their dynamic characteristics for determining the optimal parameters for application to actual equipment. In this study, we propose a numerical analysis method that couples the particle method and the magnetic moment method, focusing on the change in shear stress due to the magnetic field in MR fluids. Also, we evaluate the effects of magnetic particle density and external magnetic field strength on the cluster formation speed and particle behavior
Numerical Simulation, Physical Modeling and Plant Trial on the Slag Entrapment Behavior in a Four-Strand Tundish
Get PDFThe continuous casting process yields more than 96% crude steel worldwide. Numerical simulation and physical modeling were employed to investigate the slag entrainment behavior during the final casting stage in a four-strand continuous casting tundish. It is demonstrated that the numerical and physical modelling results agree well. Vortex formation in the final casting stage can be divided into four distinct stages: surface rotation, vortex generation, vortex development, and vortex penetration, with significant variations in critical slag entrainment depths observed among different outlets. Increasing casting speed increases slag entrainment risks, while employing vortex inhibitors could reduce the critical slag entrainment height by up to 29%. Through optimized casting termination procedures in a plant trial, the tundish residual depth decreased from 400 to 200 mm; The tail-end billet cleanliness significantly improved to reach a normal billet quality level in the end billet range of 2–3 m. This study provides theoretical and technical support for reducing slag entrainment defects and improving steel cleanliness in continuous casting.OPEN ACCESS Received: 15/05/2025 Accepted: 10/07/2025 Published: 27/10/202
IberGIS v1. User’s start guide and tutorial. Iber-SWMM calculation module
No full textUrban drainage systems are facing increasing challenges due to climate change, urban growth, and the need for more sustainable water management. To address these issues, the Digital DRAIN project has developed an open-source tool that integrates different models within a GIS environment to analyse the performance of drainage systems. The tool helps assess both water flows and pollution, while also supporting the design of sustainable solutions and adaptation strategies. Delivered as the QGIS plugin IberGIS, it provides an accessible framework to improve urban water management and enhance resilience against floods and environmental impacts
