DOI: 10.1615/ICHMT.2015.THMT-15
ISBN Print: 978-1-56700-427-4
ISBN CD: 978-1-56700-428-8
Particle laden homogeneous shear flow in the two-way coupling regime: Exact Regularized Point Particle method
RÉSUMÉ
A new approach, dubbed the Exact Regularized Point Particle (ERPP) method [1], is used to capture
the turbulence modulation by hundred thousands of small inertial particles. The proposed method overcomes some
drawbacks which arise in some circumstances in available approaches like, e.g., the Particle In Cell (PIC) method
introduced by Crowe and coworkers since 1977.
Numerical results concerning a homogeneous shear flow at moderate values of the Reynolds number laden with
hundred thousand of small inertial particles are discussed documenting the turbulence modification in the so-called
two-way coupling regime, in a range of control parameters unaccessible to the available approaches.
In particular we provide evidence that the presence of the particles induces modifications of the turbulent
fluctuation level both at large and at small scales. As will be discussed in detail in the extended contribution the
modulation is selective, i.e. anisotropic, leaving almost unaltered velocity fluctuation in the stream-wise direction
and depleting the cross-flow components. These effects are associated to the formation of small scale clusters
which are preferentially oriented by the mean flow.