Browsing by Author "Vlachos, N. S."
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Analytical and numerical study of MHD natural convection in a horizontal shallow cavity with heat generation
Benos, L. T.; Kakarantzas, S. C.; Sarris, I. E.; Grecos, A. P.; Vlachos, N. S. (2014)A study is presented of twodimensional MHD natural convection flow in an internally heated horizontal shallow cavity in the presence of an external uniform vertical magnetic field. The main feature of the present flow is ... 
Buoyancyassisted mixed convection in a vertical channel with spatially periodic wall temperature
Dritselis, C. D.; Iatridis, A. J.; Sarris, I. E.; Vlachos, N. S. (2013)The influence of a spatially periodic temperature boundary condition on the laminar mixed convection in an upward flow between two vertical parallel plates is numerically studied. A detailed assessment is presented of the ... 
A comparative study of numerical schemes and turbulence models for wind turbine aerodynamics modelling
Baxevanou, C. A.; Vlachos, N. S. (2004)This paper is a comparative study of combining turbulence models and interpolation schemes to calculate turbulent flow around a NACA0012 airfoil before and after separation. The calculations were carried out using the code ... 
Direct numerical simulation of a heat removal configuration for fusion blankets
Kakarantzas, S. C.; Grecos, A. P.; Vlachos, N. S.; Sarris, I. E.; Knaepen, B.; Carati, D. (2007)A series of direct numerical simulations (DNS) are performed to study the natural convection heat transfer between concentric cylinders at several Rayleigh and Hartmann numbers. The buoyant flow is driven by the temperature ... 
DNS/LES study of fluidparticle interaction in a turbulent channel flow at a low reynolds number
Dritselis, C. D.; Vlachos, N. S. (2008)This paper presents results of large eddy simulations (LES) combined with Lagrangian particle tracking and a pointforce approximation of particleladen turbulent channel flows with significant momentum exchange between ... 
Effect of magnetic field on nearwall coherent structures and heat transfer in magnetohydrodynamic turbulent channel flow of low Prandtl number fluids
Dritselis, C. D.; Vlachos, N. S. (2011)A numerical study is carried out of the magnetic field effects on the coherent structures and the associated heat transfer in a turbulent channel flow with constant temperature at the bottom (cold) and top (hot) walls. ... 
Evaluation study of a NavierStokes CFD aeroelastic model of wind turbine airfoils in classical flutter
Baxevanou, C. A.; Chaviaropoulos, P. K.; Voutsinas, S. G.; Vlachos, N. S. (2008)This paper describes a new aeroelastic numerical model, which combines a NavierStokes CFD solver with an elastic model and two coupling schemes for the study of the aeroelastic behaviour of wind turbine blades undergoing ... 
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. ... 
Large eddy simulation of gasparticle turbulent channel flow with momentum exchange between the phases
Dritselis, C. D.; Vlachos, N. S. (2011)This paper presents results of a large eddy simulation (LES) combined with Lagrangian particle tracking and a pointforce approximation for the feedback effect of particles on the downward turbulent gaseous flow in a ... 
Magnetic field effect on the cooling of a lowPr fluid in a vertical cylinder
Sarris, I. E.; Iatridis, A. I.; Dritselis, C. D.; Vlachos, N. S. (2010)Results of direct numerical simulations are presented for the transient and turbulent natural convection cooling of an initially isothermal quiescent liquid metal placed in a vertical cylinder in the presence of a vertical ... 
Magnetohydrodynamic natural convection in a vertical cylindrical cavity with sinusoidal upper wall temperature
Kakarantzas, S. C.; Sarris, I. E.; Grecos, A. P.; Vlachos, N. S. (2009)A series of numerical simulations were performed in order to study liquid metal MHD natural convection in a vertical cylindrical container with a sinusoidal temperature distribution at the upper wall and the other surfaces ... 
MAGNETOHYDRODYNAMIC NATURAL CONVECTION OF LIQUID METAL BETWEEN COAXIAL ISOTHERMAL CYLINDERS DUE TO INTERNAL HEATING
Kakarantzas, S. C.; Sarris, I. E.; Vlachos, N. S. (2014)Direct numerical simulation results are presented of magnetohydrodynamic liquid metal flow between two vertical coaxial cylinders under the effect of internal heating and a horizontal magnetic field. The end walls are ... 
MHD natural convection in a laterally and volumetrically heated square cavity
Sarris, I. E.; Kakarantzas, S. C.; Grecos, A. P.; Vlachos, N. S. (2005)A numerical study is presented of unsteady twodimensional natural convection of an electrically conducting fluid in a laterally and volumetrically heated square cavity under the influence of a magnetic field. The flow is ... 
Natural convection in a 2D enclosure with sinusoidal upper wall temperature
Sarris, I. E.; Lekakis, I.; Vlachos, N. S. (2002)Natural convection in a twodimensional, rectangular enclosure with sinusoidal temperature profile on the upper wall and adiabatic conditions on the bottom and sidewalls is numerically investigated. The applied sinusoidal ... 
Natural convection in rectangular tanks heated locally from below
Sarris, I. E.; Lekakis, I.; Vlachos, N. S. (2004)The present study was undertaken in order to gain understanding of certain aspects of natural convection in a glassmelting tank heated locally from below. Based on numerical predictions, the effects of Rayleigh number, ... 
Natural convection of liquid metal in a vertical annulus with lateral and volumetric heating in the presence of a horizontal magnetic field
Kakarantzas, S. C.; Sarris, I. E.; Vlachos, N. S. (2011)MHD free convection of a liquid metal is studied in a closed vertical annulus in which the upper and bottom walls are adiabatic while the cylindrical walls are kept at different temperatures. The flow is driven by two ... 
Numerical investigation of momentum exchange between particles and coherent structures in low Re turbulent channel flow
Dritselis, C. D.; Vlachos, N. S. (2011)The interaction between particles and coherent structures is studied by using discrete particle simulation combined with direct numerical simulation of gaseous flow in a vertical channel. A conditional sampling scheme is ... 
Numerical modeling of pyrolytic laserinduced chemical vapor deposition
Koutlas, G. N.; Vlachos, N. S. (2003)Laser chemical vapor deposition (LCVD) is a technique to deposit thin films of oxidation, corrosion, and wear resistant as well as electronic, optoelectronic, and superconductor materials. In order to understand the ... 
Numerical modeling of simulated blood flow in idealized composite arterial coronary grafts: Steady state simulations
Politis, A. K.; Stavropoulos, G. P.; Christolis, M. N.; Panagopoulos, F. G.; Vlachos, N. S.; Markatos, N. C. (2007)This paper presents a comparative study of simulated blood flow in different configurations of simplified composite arterial coronary grafts (CACGs). Even though the composite arterial grafting is increasingly used in ... 
Numerical modelling of flow and transport processes in a calciner for cement production
Fidaros, D. K.; Baxevanou, C. A.; Dritselis, C. D.; Vlachos, N. S. (2007)Controlling the calcination process in industrial cement kilns is of particular importance because it affects fuel consumption, pollutant emission and the final cement quality. Therefore, understanding the mechanisms of ...