Kyle D. Squires

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A method for generating three-dimensional, time-dependent turbulent inflow data for simulations of complex spatially developing boundary layers is described. The approach is to extract instantaneous planes of velocity data from an auxiliary simulation of a zero pressure gradient boundary layer. The auxiliary simulation is also spatially developing, but(More)
The modulation of isotropic turbulence by particles has been investigated using direct numerical simulation (DNS). The particular focus of the present work is on the class of dilute flows in which particle volume fractions and inter-particle collisions are negligible. Gravitational settling is also neglected and particle motion is assumed to be governed by(More)
The interaction between the inner and outer layer in large-eddy simulations (LES) that use approximate near-wall treatments is studied. In hybrid Reynolds-averaged Navier–Stokes (RANS)/LES models a transition layer exists between the RANS and LES regions, which has resulted in incorrect prediction of the velocity profiles, and errors of up to 15% in the(More)
In this paper, the results of an international collaborative test case relative to the production of a Direct Numerical Simulation and Lagrangian Particle Tracking database for turbulent particle dispersion in channel flow at low Reynolds number are presented. The objective of this test case is to establish a homogeneous source of data relevant to the(More)
2 A method for generating three-dimensional, time-dependent turbulent innow data for simulations of complex spatially-developing boundary layers is described. The approach is to extract instantaneous planes of velocity data from an auxiliary simulation of a zero pressure gradient boundary layer. The auxiliary simulation is also spatially-developing, but(More)
The purpose of this paper is to examine the feasibility of large eddy simulation (LES) for predicting gas-solid ows in which the carrier ow turbulence is modiied by momentum exchange with particles. Several a priori tests of subgrid-scale (SGS) turbulence models are conducted utilising results from direct numerical simulation (DNS) of a forced homogeneous(More)
Aircraft aerodynamics have been predicted using computational fluid dynamics for a number of years. While viscous flow computations for cruise conditions have become commonplace, the non-linear effects that take place at high angles of attack are much more difficult to predict. A variety of difficulties arise when performing these computations, including(More)
Abstract Properties of the particle velocity field are investigated using numerical simulations of gas-solid turbulent channel flow. The carrier phase is resolved using Large Eddy Simulation (LES) of the incompressible Navier-Stokes equations. The dispersed phase is computed using Lagrangian tracking in which particle motion is governed by the drag force.(More)
Detached-Eddy Simulation (DES) is a hybrid technique proposed in 1997 as a numerically feasible and plausibly accurate approach for predicting massively separated flows. Since its inception the method has been applied to a range of configurations including simple shapes such as cylinders, spheres and aircraft forebodies, in addition to complex geometries(More)