کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1703608 | 1519417 | 2013 | 24 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: CFD simulation of gas–solid flow with a cluster structure-dependent drag coefficient model in circulating fluidized beds CFD simulation of gas–solid flow with a cluster structure-dependent drag coefficient model in circulating fluidized beds](/preview/png/1703608.png)
To model the effect of clusters on hydrodynamics of gas and particles phases in risers, the interfacial drag coefficient is taken into account in computational fluid dynamic simulations by means of a two-fluid model. The momentum and energy balances that characterize the clusters in the dense phase and dispersed particles in the dilute phase are described by the multi-scale resolution approach. The model of cluster structure-dependent (CSD) drag coefficient is proposed on the basis of the minimization of energy dissipation by heterogeneous drag (MEDHD) in the full range of Reynolds number. The model of CSD drag coefficient is then incorporated into the two-fluid model to simulate flow behavior of gas and particles in a riser. The distributions of volume fraction and velocity of particles are predicted. Simulated results are in agreement with experimental data published in the literature.
Journal: Applied Mathematical Modelling - Volume 37, Issues 16–17, 1 September 2013, Pages 8179–8202