期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
A model for predicting bubble rise velocity in a pulsed gas solid fluidized bed 被引量:4
1
作者 Dong Liang Zhao Yuemin +4 位作者 Luo Zhenfu Duan Chenlong Wang Yingwei Yang Xuliang Zhang Bo 《International Journal of Mining Science and Technology》 SCIE EI 2013年第2期233-236,共4页
Bed stability, and especially the bed density distribution, is affected by the behavior of bubbles in a gas solid fluidized bed. Bubble rise velocity in a pulsed gas-solid fluidized bed was studied using photographic ... Bed stability, and especially the bed density distribution, is affected by the behavior of bubbles in a gas solid fluidized bed. Bubble rise velocity in a pulsed gas-solid fluidized bed was studied using photographic and computational fluid dynamics methods. The variation in bubble rise velocity was investigated as a function of the periodic pulsed air flow. A predictive model of bubble rise velocity was derived: ub=ψ(Ut+Up-Umf)+kp(gdb)(1/2). The software of Origin was used to fit the empirical coefficients to give ψ = 0.4807 and kp = 0.1305. Experimental verification of the simulations shows that the regular change in bubble rise velocity is accurately described by the model. The correlation coefficient was 0.9905 for the simulations and 0.9706 for the experiments. 展开更多
关键词 pulsed fluidized bed Bubble Rise velocity Prediction model
下载PDF
Modelling the unsteady melt flow under a pulsed magnetic field
2
作者 陈国军 张永杰 杨院生 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第12期333-337,共5页
A numerical model for the unsteady flow under a pulsed magnetic field of a solenoid is developed, in which magnetohydrodynamic flow equations decouple into a transient magnetic diffusion equation and unsteady Navier–... A numerical model for the unsteady flow under a pulsed magnetic field of a solenoid is developed, in which magnetohydrodynamic flow equations decouple into a transient magnetic diffusion equation and unsteady Navier–Stokes equations in conjunction with two equations of the k–ε turbulent model. A Fourier series method is used to implement the boundary condition of magnetic flux density under multiple periods of a pulsed magnetic field (PMF). The numerical results are compared with the theoretical or experimental results to validate the model under a time-harmonic magnetic field; it is found that the toroidal vortex pair is the dominating structure within the melt flow under a PMF. The velocity field of a molten melt is in a quasi-steady state after several periods; changing the direction of the electromagnetic force causes the vibration of the melt surface under a PMF. 展开更多
关键词 pulsed magnetic field Fourier series velocity field turbulent model
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部