Comparison of granular temperature measured by SVS and DEM in the rotating cylinder

The granular temperature is usually regarded as the unsteady velocity component when particles move in disorder. This property has been applied to model a wide range of phenomena. To more accurately measure the granular temperature via speckle visibility spectroscopy (SVS), this paper uses the particle velocity to complete the correction of the SVS method. The results show that differences in the granular temperature are acceptable between the corrected SVS and the discrete element method (DEM) for the continuous movement of spherical partides in a rotating cylinder. The granular temperature of they or z axis is approximately 2-3 times higher than that of the x axis. The granular temperature in the active layer is approximately 5-8 times higher than that of the passive to active layers. The corrected SVS method is superior for engineering applications. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

The paper corrects the speckle visibility spectroscopy (SVS) method using particle velocity to accurately measure the granular temperature. Results show acceptable differences in granular temperature compared to the discrete element method (DEM) for continuous movement of spherical particles. The corrected SVS method demonstrates superiority for engineering applications.