Browsing by Subject "Reynolds number"
Now showing items 120 of 39

Conference Object
3D flow of HerschelBulkley fluids
(ASME, 1998)The flow of HerschelBulkley fluids through a sudden 3D square with expansion height ratio of 2:1 is studied numerically by solving the mass and momentum conservation equations along with a continuous constitutive relation. ...

Article
An analytical solution for rapidly distorted turbulent shear flow in a rotating frame
(2006)In this study we apply rapid distortion theory to the case of nonstratified homogeneous turbulence that is sheared in a frame that counterrotates at a rate that matches in magnitude the rotation associated with the mean ...

Article
The ASBMSA turbulence closure: Taking advantage of structurebased modeling in current engineering CFD codes
(2015)Structurebased turbulence models (SBM) carry information about the turbulence structure that is needed for the prediction of complex nonequilibrium flows. SBM have been successfully used to predict a number of canonical ...

Conference Object
Computational fluid dynamics (CFD) Simulations of aerosol deposition in the lungs
(TSFP9, 2015)In the current study, Large Eddy Simulations (LES) are used to investigate the transport and deposition of inhaled aerosol particles (dp = 0.1, 0.5, 1, 2.5, 5, 10 μm) in a realistic geometry of the human airways under ...

Article
The contribution of active and inactive structures to the statistics of a turbulent pipe flow
(2017)The current study is a short followup to our most recent work (Stylianou et al., 2016), where among other things we have presented an effective criterion suitable for distinguishing largescale coherent structures with ...

Article
Core of the magnetic obstacle
(2010)Rich recirculation patterns have been recently discovered in the electrically conducting flow subject to a local external magnetic termed "the magnetic obstacle" (E.V. Votyakov, Y. Kolesnikov, O. Andreev, E. Zienicke, and ...

Article
Direct numerical simulation of particle laden flow in a human airway bifurcation model
(2016)During the delivery of inhaled medicines, and depending on the size distribution of the particles in the formulation, airway bifurcations are areas of preferential deposition. Previous studies of laminar flow through airway ...

Article
Dispersedphase structural anisotropy in homogeneous magnetohydrodynamic turbulence at low magnetic Reynolds number
(2008)A new tensor statistic, the dispersedphase structure dimensionality Dp, is defined to describe the preferred orientation of clusters of discrete bodies. The evolution of Dp is calculated via direct numerical simulations ...

Article
Dispersedphase structure in sheared MHD turbulence
(2012)Direct numerical simulations are performed to examine particle dispersion in homogeneous turbulence subjected to mean shear and an externally applied magnetic field. We employ the Brucker et al. algorithm for simulating ...

Conference Object
Effect of turbulent pulsating flow around a nearwall submerged cylinder on the potential motion of bed and suspended loads
(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
Efficient treatment of complex geometries for large eddy simulations of turbulent flows
(2004)Incompressible turbulent flow over a backward facing step at Reh=5100 is investigated by large eddy simulations (LES). The ratio of the oncoming boundary layer thickness δ to the step height h was set to 1.2. Additionally ...

Article
Flow development in compression of a finite amount of a Bingham plastic
(2007)The flow and shape evolution during the compression of a finite amount of a Bingham plastic is investigated by means of numerical simulations. The problem relates to the popular compression test used for the rheological ...

Article
Flow instabilities of HerschelBulkley fluids
(2003)We investigate numerically the interactions of twodimensional jets of Bingham plastic and HerschelBulkley fluids with a vertical surface at a distance from the die exit. This problem simulates the early stages of filling ...

Article
Inertial, viscous and yield stress effects in Bingham fluid filling of a 2D cavity
(2001)The present study concentrates on Bingham fluid filling of a 2D cavity and examines the relative importance of inertial, viscous and yield stress effects on the filling profile. The results presented are obtained using ...

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

Article
Large Eddy Simulation of nearbed pipelines in oscillatory flow
(2018)A series of unsteady, threedimensional numerical simulations of the incompressible, oscillatory flow around a nearbed pipeline is presented. A flow at Reynolds number equal to Reαo=20,000 with respect to the oscillatory ...

Article
Largeeddy simulations of the turbulent Hartmann flow close to the transitional regime
(2007)A series of largeeddy simulations (LES) of turbulent and transitional channel flows of a conductive fluid under the effect of a uniform magnetic field applied in the wallnormal direction, usually referred to as Hartmann ...

Article
Largeeddy simulations of unidirectional water flow over dunes
(2009)The unidirectional, subcritical flow over fixed dunes is studied numerically using largeeddy simulation, while the immersed boundary method is implemented to incorporate the bed geometry. Results are presented for a typical ...

Article
Magnetohydrodynamic turbulence at moderate magnetic Reynolds number
(2004)We consider the case of homogeneous turbulence in a conducting fluid that is exposed to a uniform external magnetic field at low to moderate magnetic Reynolds numbers (by moderate we mean here values as high as 20). When ...

Article
MHD flow past a circular cylinder using the immersed boundary method
(2010)The immersed boundary method (IB hereafter) is an efficient numerical methodology for treating purely hydrodynamic flows in geometrically complicated flowdomains. Recently Grigoriadis et als. [1] proposed an extension of ...