189 citations · 935 across the 41 of their papers we have counts for
6 papers · 1 filter
Asymmetric concentration dependence of segregation fluxes in granular flows
Ryan P. Jones, Austin B. Isner, Hongyi Xiao +3
We characterize the local concentration dependence of segregation velocity and segregation flux in both size and density bidisperse gravity-driven free-surface granular flows as a…
Transient response in granular quasi-2D bounded heap flow
Hongyi Xiao, Julio M. Ottino, Richard M. Lueptow +1
We study the transition between steady flows of non-cohesive granular materials in quasi-2D bounded heaps by suddenly changing the feed rate. In both experiments and simulations, t…
A Parametric Study of Mixing in a Granular Flow a Bi-Axial Spherical Tumbler
Ivan C. Christov, Richard M. Lueptow, Julio M. Ottino +1
We report on a computational parameter space study of mixing protocols for a half-full bi-axial spherical granular tumbler. The quality of mixing is quantified via the intensity of…
Modeling size segregation of granular materials: the roles of segregation, advection and diffusion
Yi Fan, Conor P. Schlick, Paul B. Umbanhowar +2
Predicting segregation of granular materials composed of different-sized particles is a challenging problem. In this paper, we develop and implement a theoretical model that captur…
Cutting and Shuffling a Line Segment: Mixing by Interval Exchange Transformations
Marissa K. Krotter, Ivan C. Christov, Julio M. Ottino +1
We present a computational study of finite-time mixing of a line segment by cutting and shuffling. A family of one-dimensional interval exchange transformations is constructed as a…
Stretching and folding versus cutting and shuffling: An illustrated perspective on mixing and deformations of continua
Ivan C. Christov, Richard M. Lueptow, Julio M. Ottino
We compare and contrast two types of deformations inspired by mixing applications -- one from the mixing of fluids (stretching and folding), the other from the mixing of granular m…