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Browsing by Subject "Immersed boundary methods"

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    • Article  

      Coherent structures in oscillating turbulent boundary layers over a fixed rippled bed 

      Grigoriadis, D. G. E.; Balaras, E.; Dimas, A. A. (2013)
      Coherent structures generated by oscillating turbulent boundary layers with or without a unidirectional current over a fixed, rippled bed are presented. The effect of ripple height and current intensity on the characteristics ...

    • Conference Object  

      Effect of turbulent pulsating flow around a near-wall submerged cylinder on the potential motion of bed and suspended loads 

      Fonias, E. N.; Grigoriadis, D. G. E. (International Society of Offshore and Polar Engineers, 2016)
      In the present work, the pulsating flow around a submerged cylinder close to the impermeable seabed is examined by means of Large Eddy Simulations (LES). A Reynolds number equal to Re = 5000 is considered, based on the ...

    • 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  

      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 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  

      MHD flow past a circular cylinder using the immersed boundary method 

      Grigoriadis, D. G. E.; Sarris, I. E.; Kassinos, Stavros C. (2010)
      The immersed boundary method (IB hereafter) is an efficient numerical methodology for treating purely hydrodynamic flows in geometrically complicated flow-domains. Recently Grigoriadis et als. [1] proposed an extension of ...

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