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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
A multiscale DEM–FEM coupled approach for the investigation of granules as crash-absorber in ship building
Springer Science and Business Media LLC - - 2022
Mohsin Ali Chaudry, Christian Woitzik, Alexander Düster, Peter Wriggers
AbstractThis paper covers a numerical analysis of a novel approach to increasing the crashworthiness of double hull ships. As proposed in Schöttelndreyer (Füllstoffe in der Konstruktion: ein Konzept zur Verstärkung vonSchiffsseitenhüllen, Technische Uni-versitt Hamburg, Hamburg, 2015), it involves the usage of granular materials in the cavity of the double hull shi...... hiện toàn bộ
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
Study on the destabilization and deformation breakage characteristics of the mine roof under repetitive mining of close coal seam group
Springer Science and Business Media LLC - - 2024
Yucheng Wang, Guiyi Wu, Dezhong Kong, Qi Zhang
Poor stability of the quarry roof is particularly prominent in close coal seam group mining. To address this challenge, the stability of the quarry roof under repeated mining disturbance was investigated using a combination of indoor tests, similar simulations and numerical simulations. The study obtained that: under the influence of two repeated mining disturbances, the 17# coal roof fissures are...... hiện toàn bộ
Position control of charged spherical particles suspended in laminar flow within a channel
Springer Science and Business Media LLC - Tập 10 - Trang 853-864 - 2022
Ehsan Motamedi, Behrooz Rahmani, Amin Moosaie
In this paper, steering a set of charged particles suspended in fluid flow within a plane channel is considered. In this way, the linear-state feedback control methodology is used to determine the external electric field. In order to design the proposed controller, at first, the governing mathematical ordinary differential equations are derived by the combination of Newton’s second law, Coulomb’s ...... hiện toàn bộ
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
MR image denoising using nonlinear regression and Fuzzy C-Means clustering
Springer Science and Business Media LLC - - Trang 256-259 - 2011
Dinh Hoan Trinh, Marie Luong, Jean-Marie Rocchisani, Canh Duong Pham, Françoise Dibos, Linh-Trung Nguyen
Magnetic Resonance (MR) imaging is useful for medical diagnosis. However, MR images are often corrupted by Rician noise, leading to undesirable visual quality. Based on the fact that many images can be acquired at nearly the same location, this paper proposes a novel learning method for the reduction of Rician noise using nonlinear ridge regression with a training set established from a set of giv...... hiện toàn bộ
#Noise #Training #Noise reduction #Biomedical imaging #Noise measurement #Image denoising #Rician channels
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
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