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3D modelling of the flow of self-compacting concrete with or without steel fibres. Part II: L-box test and the assessment of fibre reorientation during the flow
Springer Science and Business Media LLC - - 2014
R. Deeb, S. Kulasegaram, B. L. Karihaloo
The three-dimensional Lagrangian particle-based smooth particle hydrodynamics method described in Part I of this two-part paper is used to simulate the flow of self-compacting concrete (SCC) with and without steel fibres in the L-box configuration. As in Part I, the simulation of the SCC mixes without fibres emphasises the distribution of large aggregate particles of different sizes throughout the...... hiện toàn bộ
Mechanism of manual tamping operation for ballast bed based on DEM–MBD coupling
Springer Science and Business Media LLC -
Z. Qian, H. Xiao, Ruoqiang Feng, Zhihai Zhang, Mahantesh M. Nadakatti, Fang Jia
Efficient implementation of superquadric particles in Discrete Element Method within an open-source framework
Springer Science and Business Media LLC - - 2017
Alexander Podlozhnyuk, Stefan Pirker, Christoph Kloss
Weather-Based Quasi Dynamic Thermal Ratings for Power Transformers
Springer Science and Business Media LLC - - Trang 1-5 - 2023
Sergio-Daniel Montana-Salas, Andrea Michiorri
This paper presents a preliminary study on climate change’s impact on power transformers’ ratings. This limit depends on the difference between air temperature and the maximum continuous allowable hot-spot oil temperature. On the other hand, atmospheric temperatures are expected to rise in the following years in Europe in a range between 0.52% and 8.18% Celsius degrees, according to the scenario. ...... hiện toàn bộ
#Power Transformers #Transformer Thermal Dynamic Rating #Probabilistic forecasting
The use of 3D prints to assess the influence of shape on particle size distribution in the laser diffraction method
Springer Science and Business Media LLC - Tập 10 - Trang 241-248 - 2022
Cezary Polakowski, Magdalena Ryżak, Agata Sochan, Michał Beczek, Rafał Mazur, Andrzej Bieganowski
Particle size distribution (PSD) is an important characteristic of many materials. Increasingly, this characteristic is determined using the laser diffraction method (LDM). Theoretical assumptions of LDM are, i.a. the spherical shape of the measured particles and their random orientation. These criteria are often not met. 3D prints were used to test the impact of shape on LDM PSD and to monitor pa...... hiện toàn bộ
Performance improvements of differential operators code for MPS method on GPU
Springer Science and Business Media LLC - Tập 2 - Trang 261-272 - 2015
Kohei Murotani, Issei Masaie, Takuya Matsunaga, Seiichi Koshizuka, Ryuji Shioya, Masao Ogino, Toshimitsu Fujisawa
In the present study, performance improvements of the particle search and particle interaction calculation steps constituting the performance bottleneck in the moving particle simulation method are achieved by developing GPU-compatible algorithms for many core processor architectures. In the improvements of particle search, bucket loops of the cell-linked list are changed to a loop structure havin...... hiện toàn bộ
A new set of scaling relationships for DEM-CFD simulations of fluid–solid coupling problems in saturated and cohesiveless granular soils
Springer Science and Business Media LLC - Tập 6 - Trang 657-669 - 2019
Z. Q. Zhou, P. G. Ranjith, W. M. Yang, S. S. Shi, C. C. Wei, Z. H. Li
The discrete element method (DEM) cannot effectively account for macroscale problems because of its high computational cost and time-consuming nature, especially for fluid–solid coupling problems. Therefore, a spatially scaled-down model, which should be established based on a set of scaling laws, is commonly employed to study the behaviors of the macroscale prototype. In the present study, variou...... hiện toàn bộ
A nanoscale insight into the formation damage of carbonate reservoir due to water incompatibility during smart water injection: a molecular dynamics study
Springer Science and Business Media LLC - Tập 10 - Trang 887-910 - 2022
Zahra Kargozarfard, Ali Haghtalab, Shahab Ayatollahi
Scale deposition on the rock surface critically influences the performance of the water flooding process in an oil reservoir. Besides altering the pore structure of porous media, the scaling process can significantly modify the distribution of ionic species at the solid–liquid interface, which subsequently changes the rock-brine interaction. Molecular dynamics simulation is utilized in this study ...... hiện toàn bộ
Modified Finite Particle Methods for Stokes problems
Springer Science and Business Media LLC - - 2017
A. Montanino, D. Asprone, A. Reali, F. Auricchio
The Modified Finite Particle Method (MFPM) is a numerical method belonging to the class of meshless methods, nowadays widely investigated due to their characteristic of being capable to easily model large deformation and fluid-dynamic problems. Here we use the MFPM to approximate the Stokes problem. Since the classical formulation of the Stokes problem may lead to pressure spurious oscillations, w...... hiện toàn bộ
CFD simulation of cross-flow mixing in a packed bed using porous media model and experimental validation
Springer Science and Business Media LLC - Tập 6 - Trang 157-162 - 2018
Kamyar Mohammadpour, Ali Alkhalaf, Eckehard Specht
Understanding the flow pattern of the gas jet can have considerable significance in improving the reactor design and process optimization. The current study attempts to demonstrate the viability of using computational fluid dynamics (CFD) as a design tool for such packed beds by visualizing the flow structure in the reaction zone; the porous media model (PMM) is introduced as a method for simulati...... hiện toàn bộ
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