Browsing by Subject "Immersed boundary methods"

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 ...