کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
239174 | 465802 | 2008 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: On the calculation of self-diffusion in vertically agitated granular beds On the calculation of self-diffusion in vertically agitated granular beds](/preview/png/239174.png)
We present self-diffusion calculations derived from discrete element simulations of an idealized granular material under gravity, which is energized through vertical, sinusoidal oscillations of a plane rigid floor. The bed of particles is agitated to a degree so that computed steady-state profiles of granular temperature and solids fraction are consistent with kinetic theory predictions. The average self-diffusivity for the entire assembly, computed both from the velocity autocorrelation function and the mean-square displacement, is found to compare well with an analytic expression taken from kinetic theory.
The self-diffusivity of a vertically oscillated ideal granular material was determined from discrete element simulations. The bed of inelastic, frictional spheres was agitated to a degree so that computed steady-state profiles of granular temperature and solids fraction were consistent with kinetic theory predictions. In this situation, the average self-diffusivity for the assembly (see Fig.) compared well with an analytic expression taken from kinetic theory.Figure optionsDownload as PowerPoint slide
Journal: Powder Technology - Volume 182, Issue 2, 22 February 2008, Pages 228–231