Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering: Recent submissions
Now showing items 961-980 of 1036
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Article
Realization of La2MnVO6: Search for half-metallic antiferromagnetism?
(2002)Single-phase polycrystalline La2MnVO6 samples were synthesized by arc-melting and characterized by X-ray diffraction, magnetization and resistivity measurements. We find that the compound has cubic (space group Fm3̄m), ...
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Article
Magnetic properties of the half-metallic ferromagnet NiMnSb grown on InSb by pulsed laser deposition
(2004)We have grown films of the half-metallic ferromagnet NiMnSb on single crystals of the narrow gap semiconductor InSb by pulsed laser deposition. NiMnSb is a possible candidate for spin injection applications. The film ...
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Article
Comparative study of the magnetic and magnetotransport properties of a metallic and a semiconducting member of the solid solution LaNixCo1-xO3
(2003)A metallic and a semiconducting member of the solid solution LaNixCo1-xO3 (x=0.2, 0.6) with their magnetic and magnetotransport properties was investigated. The members of the perovskite solid solution were found on opposite ...
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Article
The density of water in carbon nanotubes
(2008)In this paper, the density of water confined in carbon nanotubes of different sizes and chirality is calculated. Molecular dynamics is used to simulate the spontaneous filling of the nanotube with water molecules coming ...
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Article
Influence of water model and nanotube rigidity on the density of water in carbon nanotubes
(2008)The density of water calculated through molecular dynamic simulations using different water models and rigid/flexible carbon nanotubes is studied. A previous equation, determined in an earlier work in order to correlate ...
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Article
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Article
La0.95Sr0.05Coo3: An efficient room-temperature thermoelectric oxide
(2004)Electric resistivity, thermal conductivity, and the thermopower of polycrystalline Sr-doped LaCoO3 with composition La 0.9Sr0.5CoO3 were measured. The crystal structure of the synthesized powders was determined by x-ray ...
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Article
Three-Dimensional Modelling of Concentration Fluctuations in Complicated Geometry
(2001)The strong fluctuating component in the measured concentration time series of a dispersing gaseous pollutant in the atmospheric boundary layer, and the hazard level associated to short-term concentration levels, demonstrate ...
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Article
Self-diffusivity, hydrogen bonding and density of different water models in carbon nanotubes
(2008)In this paper, the density, hydrogen bonding and self-diffusivity of water confined in carbon nanotubes are investigated. Molecular dynamics is used to simulate a large variety of nanotubes with various water models. Our ...
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Article
Why one-size-fits-all vaso-modulatory interventions fail to control glioma invasion: In silico insights
(2016)Gliomas are highly invasive brain tumours characterised by poor prognosis and limited response to therapy. There is an ongoing debate on the therapeutic potential of vaso-modulatory interventions against glioma invasion. ...
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Article
Solid Tumors Are Poroelastic Solids with a Chemo-mechanical Feedback on Growth
(2017)The experimental evidence that a feedback exists between growth and stress in tumors poses challenging questions. First, the rheological properties (the “constitutive equations”) of aggregates of malignant cells are still ...
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Article
Molecular simulation of water in carbon nanotubes
(2008)The motion of water in carbon nanotubes (CNT) by numerical procedures is calculated through molecular dynamics (MD) simulation studies. The Lennard-Jones potential is a simple MD simulations technique, which combines ...
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Article
Molecular dynamic simulations of carbon nanotubes in CO2 atmosphere
(2008)This work investigates by means of molecular dynamics the filling of carbon nanotubes by carbon dioxide molecules. Nanotubes of various sizes are simulated and the resulting CO2 density calculated. The effects of various ...
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Conference Object
A two-phase fluid model of crystal settling under variable gravity
(American Institute of Aeronautics and Astronautics Inc, AIAA, 1999)A two-phase fluid model of crystal particle motion in a liquid is presented. The model includes a liquid and a solid phase as continua and forces due to pressure, viscous stresses, variable gravity and fluid drag. The model ...
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Article
On the use of the BLYP functional for the DFT calculation of graphite-hydrogen systems
(2010)This letter focuses on a possible pitfall that can occur in the DFT calculation of graphite-hydrogen interactions under tokamaks conditions. Calculations based on the BLYP functional, in fact, result in a stable -C2H3 group ...
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Article
On the early breakdown of semisolid suspensions
(2007)Semisolid materials are suspensions of metal alloys which are processed while in a mushy state. In this state, the suspensions behave as viscoplastic materials with time-dependent material properties. During processing, ...
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Article
Determining true material constants of semisolid slurries from rotational rheometer data
(2016)In this work we revisit the issue of obtaining true material constants for semisolid slurries. Therefore, we consider the circular Couette flow of Herschel-Bulkley fluids. We first show how true constants can be obtained ...
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Article
Parameter estimation for semi-solid aluminum alloys using transient experiments
(2006)A rotating vane-cup rheometer is used to determine the rheological properties of semi-solid slurries, and a procedure is established for characterizing the rheology with emphasis given to the proper and self-consistent ...
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Article
Steady Herschel-Bulkley fluid flow in three-dimensional expansions
(2001)In this paper we study steady flow of Herschel-Bulkley fluids in a canonical three-dimensional expansion. The fluid behavior was modeled using a regularized continuous constitutive relation, and the flow was obtained ...
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Article
Transient planar squeeze flow of semi-concentrated fiber suspensions using the Dinh-Armstrong model
(2007)Numerical simulations are undertaken for the transient squeeze flow between parallel plates under a constant load. The conservation equations are solved via the finite element method in space and the Crank-Nicolson method ...