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Now showing items 1-10 of 16

#### Structure-based turbulence model: Application to a rotating pipe flow

(2002)

A new approach for modeling the one-point turbulence statistics, which takes into account the information on turbulence structure, has been suggested in Kassinos and Reynolds (Report TF-61, Thermosciences Division, Department ...

#### A simplified structure-based model using standard turbulence scale equations: computation of rotating wall-bounded flows

(2006)

Two linear eddy-viscosity models, the v2-f and k-ω models, have been combined with an algebraic structure-based algorithm for the evaluation of the Reynolds stresses. This closure was originally designed as an integral ...

#### Large Eddy Simulation of near-bed pipelines in oscillatory flow

(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 ...

#### 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 ...

#### The contribution of active and inactive structures to the statistics of a turbulent pipe flow

(2017)

The current study is a short follow-up to our most recent work (Stylianou et al., 2016), where among other things we have presented an effective criterion suitable for distinguishing large-scale coherent structures with ...

#### Effect of turbulent pulsating flow around a near-wall 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 ...

#### 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 counter-rotates at a rate that matches in magnitude the rotation associated with the mean ...

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

(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 ...

#### The ASBM-SA turbulence closure: Taking advantage of structure-based modeling in current engineering CFD codes

(2015)

Structure-based turbulence models (SBM) carry information about the turbulence structure that is needed for the prediction of complex non-equilibrium flows. SBM have been successfully used to predict a number of canonical ...

#### 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 ...