Objectives and achievements of the production of disperse composite materials (DCMs) which consist of particles with a metal coating are represented. The prospects of the DCM production by the dusty ...plasma method based on confining a cloud of micron-sized particles in a discharge plasma and on magnetron sputtering are shown. The method was tested in the preparation of catalyst materials, a superhard diamond polycrystalline material, and a polyquasicrystalline material with a low friction coefficient. The results of investigations of the structure and properties of powdered and sintered DCMs are presented.
The paper describes a high-performance computer network optimized for the transmission of experimental data generated by CERN for potential use by the Large Hadron Collider (LHC) network community, ...including the Russian segment of this network. The Worldwide LHC Computing Grid (WLCG) is a global computing infrastructure whose mission is to provide computing resources for storing, distributing and analyzing data generated by the LHC at CERN, making the data equally accessible to all participants, regardless of their physical location. WLCG is a multi-layer distributed computing infrastructure. It provides a community of over 12,200 scientists of 110 nationalities from institutions in over 40 countries with near real-time access to LHC data. WLCG is the world's largest computer network. It is supported by many related national and international networks and projects around the world. Since the beginning of the WLCG Project the Russian computing centers in NRC "Kurchatov Institute" an JINR have participated with reliable and stable resources as well as personnel for the LHC. Contribution to the ALICE, ATLAS, CMS and LHCb Tier 1 and Tier 2 computing resources (disk and CPUs) in the last 10 years has been substantial. In this paper, we would like to show the evolution and technical updates in the Russian segment Tier1 and Tier 2. The Russian segment is an infrastructure fully integrated into the WLCG.
Disperse composite materials consisting of quasi-crystalline Al-Cu-Fe particles covered by nickel nanolayers have been obtained using a dusty plasma trap coating technology. These powders were ...processed into macrocomposites by cold pressing with subsequent sintering in hydrogen. The macrocomposites were studied by the electron microscopy, electron-probe microanalysis, and X-ray diffraction techniques. It is established that sintering at ∼750°C yields a high-strength macrocomposite that is not fractured under tribological testing conditions. Despite the fact the samples sintered at 750°C contain about 50 wt % of β phase, their friction coefficient is close to that of Al-Cu-Fe quasi-crystals.
Simulation of the water flow around a ship hull and a marine propeller operation are considered in this paper as popular problems of ship propulsion, which are frequently investigated through CFD ...approach now. CFD technologies are used for determination of ship hull resistance as well as the open water curves of the propeller according to usual methods of ship design. FlowVision CFD software is used for simulations based on solving RANS equations. The software was used together with supercomputer "HPC 2" of National Research Center "Kurchatov Institute". The original features of the numerical models and technologies, software algorithms and the supercomputer's hardware are submitted and discussed. There are the method of grid formation based on Cartesian initial grid and chimerical overlapping boundary layer grid, special versions of turbulence models, modified method of free surface simulation and many other things among them. Governing equations for water flow, which are integrated using an implicit numerical method, are given as well. The generated systems of linear equations are solved by an aggregative algebraic multigrid method. The scalability of this method on the supercomputer has been studied and analyzed.
