Zhang H.-Y.,Xi'an University of Technology |
Zhang H.-Y.,Xian Non Ferrous Metallurgical Institute of Clesign and Research |
Xu L.,Xi'an University of Technology |
Xu L.,Xian Non Ferrous Metallurgical Institute of Clesign and Research |
And 2 more authors.
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2013
Rising bubble will induce flow field, and then affect the movement of particles in static water. There are many gas- liquid-solid three-phase flow problems in the water treatment field, for which we need to establish an effective method of study. This paper used the phase field method to simulate the gas-liquid two phase flow. Two important results, the dynamic processes of bubble rising, expansion and deformation and the induced external flow field of this rising bubble, were obtained from simulation directly. Particles were introduced into this system and their movement under the gravity, buoyancy and Stokes force was investigated. So far, the model of particle movement under the action of rising bubble was established. On this basis, we studied the effect of different parameters, including particle size, the transverse distribution and the vertical position was studied. To compare with the previous experiment about the particles movement in backwash filter, it can be seen that the numerical simulation reflects the microscopic mechanism of particle movement by rising bubble rise very well.