کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
158574 | 457013 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Experimental study on collision rates of inertial particles in particulate flows under the effect of gravity Experimental study on collision rates of inertial particles in particulate flows under the effect of gravity](/preview/png/158574.png)
To investigate the inter-particle collision frequency, the present experiment conducts two streams of particulate flow converging into a main flow in a junction. Each stream of particulate flow consists of inertial steel particles of 1 and 2 mm diameter, respectively. Particles glide down inside two branches of slanting glass rectangular ducting. We use a high-speed camera to record the trajectory of particle and a PTV technique for data processing. The correlation between the inter-particle collision frequency, particulate concentration, effective diameter and mean fluctuation velocity of inertial particles is explored experimentally. The effect of inter-particle collision frequency under the effect of gravity force is considered and analyzed. Due to the high inertia of steel particles, the turbulent effect of gas-phase is eliminated. A significant difference between the characteristics of the gravitational particulate flow and the homogeneous isotropic flow is found. The physical interpretation for it and the statistical correlation with inter-particle collision frequency are discussed. The results support the analogy of kinetic theory for inertial particles in gas–solid flow provided the gravity effect is excluded.
Journal: Chemical Engineering Science - Volume 62, Issue 22, November 2007, Pages 6112–6120