A liquid meniscus between two lyophilic solid surfaces causes an attractive force, the
capillary force. The meniscus can form by capillary condensation or by accumulation of …

Worldwide photovoltaic power generation is affected by deposited dust on photovoltaic (PV)
systems, which creates soiling losses. In this work, factors that have a detrimental influence …

In this paper we study the effect of rolling friction on the dynamics in a single spout fluidized
bed using Discrete Element Method (DEM) coupled to Computational Fluid Dynamics …

Most studies on granular physics have focused on dry granular media, with no liquids
between the grains. However, in geology and many real world applications (eg food …

Recent advances in understanding model systems of wet granular materials are presented,
with particular emphasis on statistical concepts, dynamics, and phase transitions. It is …

We have studied the drag force acting on an object moving with low velocity through a
granular medium. Although the drag force is a dynamic quantity, its behavior in this regime is …

Numerical and analytical models of sand and dust particle accumulation on photovoltaic
modules in dry regions are presented and supported by a laboratory investigation of sand …

Capillary forces significantly affect the stability of sandpiles. We analyze the stability of
sandpiles with such forces, and find that the critical angle is unchanged in the limit of an …

An ensemble approach for force distributions in static granular packings is developed. This
framework is based on the separation of packing and force scales, together with an a priori …

We present the results of experiments on impact craters formed by drop** a steel ball
vertically into a container of small glass beads. As the energy of impact increases, we …