ABSTRACT: It may be said that the shape of sand deposition is normally cone and sand grains are oriented a certain angle of deposition repose is made. This angle is such that no stability occurs. Thus the angle of repose is somewhat correlated to the sand internal friction angle. This paper presents the results of a series of laboratory experiments performed three types of sand. For this purpos...

When a sandpile relaxes under vibration, it is known that its measured angle of repose is bistable in a range of values bounded by a material-dependent maximal angle of stability; thus, at the same angle of repose, a sandpile can be stationary or avalanching, depending on its history. In the nearly jammed slow dynamical regime, sandpile collapse to a zero angle of repose can also occur, as a ra...

When a sandpile relaxes under vibration, it is known that its measured angle of repose is bistable in a range of values bounded by a material-dependent maximal angle of stability; thus, at the same angle of repose, a sandpile can be stationary or avalanching, depending on its history. In the nearly jammed slow dynamical regime, sandpile collapse to a zero angle of repose can also occur, as a ra...

Granular flow in a rotating drum is studied by experiments and by Computation Fluid Dynamics (CFD) simulations. The particulate phase is modelled based on the Continuum Eulerian Approach (CEA) in the simulation. The particulate phase CEA prediction using the common Gidaspow granular kinetic viscosity or the Syamlal-O’brien granular kinetic viscosity fails to predict the measured dynamic angle o...

In this work a new optical method of measuring the static angles of repose of hard wheat grain is presented. Conventional methods of measuring angle of repose are based on manual measurements of angle by protractor or calculation from measured diameter and height of the pile using the trigonometric equation. These methods are based on the assumption that the stacked grains form a symmetrical co...

due to medical and dietary properties of the plantago major l. seed, it is necessary to know engineering properties in order to design post harvest equipments. engineering properties of plantago major l. seed was determined only at the moisture content of 7.98% dry basis, because of it produces mucilaginous components when it is soaked in water. the average of length, width, surface area, spher...