Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering: Recent submissions
Now showing items 401-420 of 1036
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Article
Structure and scales in turbulence modeling
(2002)The enstrophy of the large-scale energy-containing turbulence is proposed as the second turbulence scale for use, in conjunction with the turbulence energy, in two-scale one-point engineering turbulence models. Its transport ...
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Article
Numerical simulations of turbulent flows within an infinite array of randomly placed cylinders
(2018)We address the task of modelling numerically turbulent flows within random arrays of circular cylinders, relevant for several industrial and environmental applications. Numerical simulations are employed to model infinite ...
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Article
Hall effect in an untwinned single crystal of YBa2Cu3O7-x
(1991)The Hall coefficient RH for untwinned single-crystal YBa2Cu3O7-x has been measured for the first time. The crystal was produced by a technique not requiring the application of stress. The measurements are made above the ...
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Article
Hall effect above Tc in untwinned single-crystal YBa2Cu3O7-x: Normal-state behavior and superconducting fluctuations
(1991)We present a measurement of the Hall coefficient RH for an untwinned single crystal of YBa2Cu3O7-x. The crystal was produced by a method that does not involve thermomechanical detwinning, and has a resistivity along the ...
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Article
Structure, mechanical and tribological properties of nitrogen-containing chromium coatings prepared by reactive magnetron sputtering
(1999)Cr(1-x)N(x) coatings were deposited by magnetron sputtering at a substrate temperature of 200°C onto AISI 316 stainless-steel substrates immersed in an Ar/N2 plasma. The goal of this investigation was to study the influence ...
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Article
Structure, hardness and mechanical properties of magnetron-sputtered titanium-aluminium boride films
(1999)TiAlB films nominally 2 μm thick were produced by simultaneous sputtering from TiAl and TiB2 targets onto Si-(110) and AISI316 stainless steel substrate materials at a temperature of 170°C. The influence of different B/Al ...
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Article
Correlation of elastic modulus, hardness and density for sputtered TiAlBN thin films
(2006)This paper describes the correlation between the elastic modulus, hardness and density of mainly X-ray amorphous TiAlxByNz (0.29 ≤ x ≤ 1.32
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Article
Structure, mechanical and tribological properties of Ti-B-N and Ti-Al-B-N multiphase thin films produced by electron-beam evaporation
(1998)Titanium-based multiphase ceramic coatings were deposited by electron-beam plasma-assisted physical vapor deposition, evaporating mixtures of Ti, TiB2, and (Ti0.6Al0.4)B2.19N1.47 material in Ar or Ar/N2 plasmas. All exhibited ...
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Article
Composite DLC-metal/metal-carbide coatings produced by electron enhanced unbalanced magnetron sputtering
(1997)Composite coatings consisting of metal containing diamond like carbons were produced by unbalanced magnetron sputtering in a closed field magnetic configuration. Targets of Pta and W were poisoned with acetylene during the ...
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Article
Wear behaviour of carbon-containing tungsten coatings prepared by reactive magnetron sputtering
(1999)W(1-x)C(x) coatings (with x being in the range of 0.05-0.19) were deposited by reactive magnetron sputtering on to AISI 316 stainless-steel substrates in order to study the influence of the carbon content on the tribological ...
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Article
Structure, mechanical and tribological properties of sputtered TiAlBN thin films
(1999)TiAlBN films were produced by simultaneously sputtering from TiAl and TiB2 targets in Ar/N2 mixtures at a substrate temperature of 150 °C. The goal of this investigation was to study the influence of the nitrogen content ...
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Article
Linear dependencies in fourth-rank turbulence tensor models
(1998)In turbulence modeling, and perhaps elsewhere, one encounters the need to model a fourth-rank tensor Mijpq, which is symmetric in ij and pq, in terms of a second-rank symmetric tensor bij. It has commonly been assumed that ...
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Article
Deposition and characterisation of carbon-containing tungsten coatings prepared by reactive magnetron sputtering
(1998)Carbon-containing tungsten coatings were deposited by magnetron sputtering onto AISI 316 stainless steel substrates in Ar/C2H2 gas mixtures. Optical emission spectroscopy was used to control the C2H2 gas flow. The goal of ...
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Conference Object
Numerical modeling of turbulent airflow and particle deposition in a bifurcating airway model
(Affiliation: UCY-CompSci Computational Sciences Laboratory, Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, CyprusCorrespondence Address: Radhakrishnan, H.UCY-CompSci Computational Sciences Laboratory, Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprus, 2009)Understanding transport and deposition of inhaled particles in the human airways plays a crucial role in the targeted therapy of pulmonary diseases, and the administration of inhaled medicines. Numerous researchers have ...
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Conference Object
Test-driven Coarray parallelization of a legacy Fortran application
(Affiliation: EXA High Performance Computing, Nicosia, CyprusAffiliation: Center for Computational Earth and Environmental Sciences, Stanford University, Stanford, CA, United StatesAffiliation: Combustion Research Facility, Sandia National Laboratories, Livermore, CA, United StatesAffiliation: Performance Research Laboratory, University of Oregon, Eugene, OR, United StatesAffiliation: UCY-CompSci, University of Cyprus, Nicosia, CyprusCorrespondence Address: EXA High Performance Computing, Nicosia, Cyprus, 2013)This paper summarizes a strategy for parallelizing a legacy Fortran 77 program using the object-oriented (OO) and coarray features that entered Fortran in the 2003 and 2008 standards, respectively. OO programming (OOP) ...
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Doctoral Thesis
Synthesis and properties of titanium aluminium boron nitride coatings. [electronic resource]
(1999)
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Article
Deposition and characterisation of TiAlBN coatings produced by direct electron-beam evaporation of Ti and Ti-Al-B-N material from a twin crucible source
(1999)TiAlBN coatings were synthesised by evaporating Ti and hot isostatically pressed TiAl0.68B3.67N2.44 material from a twin crucible source in an Ar plasma at 450°C. A combination of optical emission spectroscopy and partial ...
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Article
Using Coarrays to Parallelize Legacy Fortran Applications: Strategy and Case Study
(2015)This paper summarizes a strategy for parallelizing a legacy Fortran 77 programusing the object-oriented (OO) and coarray features that entered Fortran in the 2003 and 2008 standards, respectively. OO programming (OOP) ...
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Article
Miniature thermal matches: From nanoheaters to reactive fractals
(2015)Fine thermal actuation by miniature heat sources enables applications from electronics fabrication to tumor cauterization. This paper introduces the concept of nanoheaters, i.e., reactive bimetallic material dots (0D), ...
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Article
The effect of boron additions on the tribological behaviour of TiN coatings produced by electron-beam evaporative PVD
(1999)TiN coatings containing small amounts of boron were synthesized by electron beam evaporating a Ti-B alloy material from a single crucible source into a plasma comprising Ar or an Ar/N2 mixture at a substrate temperature ...