## Search

Now showing items 1-9 of 9

#### 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 ...

#### The transport of a passive scalar in magnetohydrodynamic turbulence subjected to mean shear and frame rotation

(2007)

We consider the transport of a passive scalar under the influence of homogeneous turbulence in a conducting fluid that is exposed to a uniform external magnetic field while being sheared in fixed and rotating frames. The ...

#### Statistical measures of structural anisotropy in MHD turbulence subjected to mean shear and frame rotation

(2006)

We consider homogeneous turbulence in a conducting fluid that is exposed to a uniform external magnetic field while being sheared in fixed and rotating frames. We take both the frame-rotation axis and the applied magnetic ...

#### Structure and scales in turbulence modeling

(2002)

The enstrophy of the large-scale energy-containing turbulence is proposed as the second turbulence scale for use, in conjunction with the turbulence energy, in two-scale one-point engineering turbulence models. Its transport ...

#### Dispersed-phase structural anisotropy in homogeneous magnetohydrodynamic turbulence at low magnetic Reynolds number

(2008)

A new tensor statistic, the dispersed-phase 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 ...

#### Representing anisotropy of two-point second-order turbulence velocity correlations using structure tensors

(2008)

A locally homogeneous representation for the two-point, second-order turbulent velocity fluctuation Rij(x,r) = 〈u′i(x)u′i(x+r)〉 is formulated in terms of three linearly independent structure tensors [Kassinos et al., J. ...

#### 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 ...

#### 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 ...

#### 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 ...