Mesoscale drag modeling is the critical issue for the simulation of gas–solid two-phase
flows. This article reviews the physical origin of the drag force and the development of …

In recent years, observations of the atmospheric surface layer have greatly promoted
research on high-Reynolds-number wall-bounded turbulence, especially observations of …

Drag force is essential to dense flows, but the accurate and robust drag model is still an
open issue. Direct numerical simulations of a shallow and a deep bubbling bed of moving …

Supercritical water gasification is an efficient and clean way of energy conversion. The
research on different scales, such as the system, reactor, and particle, has different temporal …

Nano-and micrometer particles tend to stick together to form agglomerates in the presence
of attractions. An accurate calculation of the drag and lift forces on an agglomerate is a key …

Drag is a fundamental force on the motion of particles. In this study, the effects of particle
surface roughness, particle volume fraction, and interactions on particle drag coefficients …

Estimating the size and density of fine particle aggregates in suspension is challenging,
often involving analysing 2D images captured during settling tests. This study explores …

Inorganic/organic composite nuclear wastes have poor settling properties which hinder
major UK decommissioning operations. Improving the settling properties of these wastes …

Fractal nanoparticle agglomerates (FNPAs) have radially inhomogeneous permeability
distribution, and their shielding effects are different from those on solid particles and …

As one important example of particle-laden flows, fluidized beds have been the subject of
intense research owing to their wealth of scientifically interesting phenomena, as well as …