Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Title

Now showing items 439-458 of 1036

    • Article  

      KrF pulsed laser deposition of La5Ca9Cu24O41 thin films on various substrates 

      Pervolaraki, M.; Athanasopoulos, G. I.; Saint-Martin, R.; Revcolevschi, A.; Giapintzakis, John (2009)
      Recent studies on single crystals of cuprate oxides containing spin chains and ladders have reported large anisotropic magnon-mediated thermal conductivity. A potential use of thin films of such materials could be in the ...
    • Article  

      KSb5S8: A wide bandgap phase-change material for ultra high density rewritable information storage 

      Kyratsi, Theodora; Chrissafis, K.; Wachter, J.; Paraskevopoulos, K. M.; Kanatzidis, M. G. (2003)
      The reversible glassformation and glass crystallization properties of KSb3S8 was described. On the basis of glass transition and crystallization kinetics of KSb5S8, it was found that the crystallization rate and assoicated ...
    • Article  

      La0.95Sr0.05Coo3: An efficient room-temperature thermoelectric oxide 

      Andrbulakis, J.; Migiakis, P.; Giapintzakis, John (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 ...
    • Article  

      Lagrangian particle dispersion in turbulent flow over a wall mounted obstacle 

      Grigoriadis, D. G. E.; Kassinos, Stavros C. (2009)
      Large-eddy simulations (LES) of particle-laden turbulent flows are presented in order to investigate the effects of particle response time on the dispersion patterns of a space developing flow with an obstruction, where ...
    • Article  

      Laminar free convection in a square enclosure driven by the Lorentz force 

      Sarris, I. E.; Grigoriadis, D. G. E.; Vlachos, N. S. (2010)
      A numerical study is presented of laminar free convection flow driven by magnetic forces. An external magnetic field with one spatially varying component is applied to an electrically conducting fluid in a square enclosure. ...
    • Conference Object  

      Large Eddy Simulation of Flow over Dunes Laden with Inertial Particles 

      Fonias, E. N.; Grigoriadis, Dimokratis G. E. (Springer International Publishing, 2018)
      Waves and currents are the basic mechanisms that set sediment in motion affecting the morphology of erodible beds in coastal flows.
    • Article  

      Large eddy simulation of flow over dunes laden with inertial particles 

      Fonias, E. N.; Grigoriadis, D. G. E. (2018)
      Waves and currents are the basic mechanisms that set sediment in motion affecting the morphology of erodible beds in coastal flows. © 2018, Springer International Publishing AG.
    • Article  

      Large Eddy Simulation of near-bed pipelines in oscillatory flow 

      Fonias, Efstratios N.; Grigoriadis, Dimokratis G. E. (2018)
      A series of unsteady, three-dimensional numerical simulations of the incompressible, oscillatory flow around a near-bed pipeline is presented. A flow at Reynolds number equal to Reαo=20,000 with respect to the oscillatory ...
    • Article  

      Large Eddy Simulation of near-bed pipelines in oscillatory flow 

      Fonias, E. N.; Grigoriadis, D. G. E. (2018)
      A series of unsteady, three-dimensional numerical simulations of the incompressible, oscillatory flow around a near-bed pipeline is presented. A flow at Reynolds number equal to Reαo=20,000 with respect to the oscillatory ...
    • Conference Object  

      Large eddy simulation of sediment transport for the pulsating flow past a cylinder over a horizontal bed 

      Fonias, E. N.; Grigoriadis, D. G. E. (International Society of Offshore and Polar Engineers, 2015)
      In the present work, the suspended, pulsating incompressible flow past a submerged cylinder was examined by means of Large Eddy Simulations (LES). A layer of sandy inertial particles was allowed to move between the cylinder ...
    • Article  

      Large eddy simulation of thermocline flow phenomena and mixing during discharging of an initially homogeneous or stratified storage tank 

      Kaloudis, E.; Grigoriadis, D. G. E.; Papanicolaou, E.; Panidis, T. (2014)
      This study investigates numerically the flow phenomena developing in the discharging process of a rectangular water tank used for thermal energy storage and how these affect the thermal mixing and the associated energy ...
    • Article  

      Large eddy simulations of turbulent mixed convection in the charging of a rectangular thermal storage tank 

      Kaloudis, E.; Grigoriadis, D. G. E.; Papanicolaou, E.; Panidis, T. (2013)
      The Large Eddy Simulation (LES) approach is used to investigate numerically the mixed convection problem arising during the charging process of a rectangular water tank used for thermal energy storage. Two different charging ...
    • Article  

      Large positive magnetoresistance in nonstoichiometric NiMnSb thin films on silicon 

      Branford, W. R.; Clowes, S. K.; Syed, M. H.; Bugoslavsky, Y. V.; Gardelis, S.; Androulakis, J.; Giapintzakis, John; Grigorescu, C. E. A.; Berenov, A. V.; Roy, S. B.; Cohen, L. F. (2004)
      The transport properties of pulsed-laser-deposited NiMnSb films on silicon as a function of film thickness were discussed. It was found that a low-temperature upturn was observed in the resistivity for film thicknesses of ...
    • Article  

      Large-eddy simulation of wave turbulent boundary layer over rippled bed 

      Grigoriadis, D. G. E.; Dimas, A. A.; Balaras, E. (2012)
      Large-eddy simulation (LES) of turbulent boundary layer induced by external oscillatory flow without or with a unidirectional component over rippled bottom is presented. These flows represent prototype turbulent flows of ...
    • Article  

      Large-eddy simulations of the turbulent Hartmann flow close to the transitional regime 

      Sarris, I. E.; Kassinos, Stavros C.; Carati, D. (2007)
      A series of large-eddy simulations (LES) of turbulent and transitional channel flows of a conductive fluid under the effect of a uniform magnetic field applied in the wall-normal direction, usually referred to as Hartmann ...
    • Article  

      Large-eddy simulations of unidirectional water flow over dunes 

      Grigoriadis, D. G. E.; Balaras, E.; Dimas, A. A. (2009)
      The unidirectional, subcritical flow over fixed dunes is studied numerically using large-eddy simulation, while the immersed boundary method is implemented to incorporate the bed geometry. Results are presented for a typical ...
    • Article  

      LaSrMnCoO6: A new cubic double perovskite oxide 

      Androulakis, J.; Katsarakis, N.; Giapintzakis, John; Vouroutzis, N.; Pavlidou, E.; Chrissafis, K.; Polychroniadis, E. K.; Perdikatsis, V. (2003)
      Single-phase polycrystalline powder samples of the double perovskite oxide LaSrMnCoO6 were synthesized by the Pechini (citrate-gel) technique. The structural, magnetic and electrical properties of the obtained powders were ...
    • Article  

      Lattice thermal conductivity of K 2(Bi 1-zSb z) 8Se 13 solid solutions 

      Kyratsi, Theodora; Hatzikraniotis, E.; Paraskevopoulous, M.; Dyck, J. S.; Shin, H. K.; Uher, C.; Kanatzidis, M. G. (2004)
      The influence of the Bi/Sb partial substitution to the lattice thermal conductivity of the K 2(Bi 1-zSb z) 8Se 13 solid solution series was studied. The variation of the lattice thermal conductivity with comparison was ...
    • Article  

      Layered atomic structures of double oxides for low shear strength at high temperatures 

      Stone, D.; Liu, J.; Singh, D. P.; Muratore, C.; Voevodin, A. A.; Mishra, S.; Rebholz, Claus; Ge, Q.; Aouadi, S. M. (2010)
      Double oxide phases combining a transition metal and a noble metal have recently become a subject of investigation as solid lubricant materials for high-temperature tribological applications. Here, we study the changes in ...
    • Article  

      LES of the flow past a rectangular cylinder using the immersed boundary concept 

      Grigoriadis, D. G. E.; Bartzis, J. G.; Goulas, A. (2003)
      Incompressible turbulent flow past a long square cylinder is investigated using large eddy simulations LES). Results are presented and compared with available experimental databases for a Reynolds number Red = 22 000. The ...