进口边界条件是影响鼓泡流化床流体动力行为的重要因素之一.本文基于欧拉一欧拉双流体气固两相流模型,对具有中心射流进口的鼓泡流化床进行了数值模拟研究.分别采用脉动和定常进口气体速度边界条件,对鼓泡流化床内气泡的形成、长大、分离,气泡的大小进行了分析和研究.模拟结果与Kuipers等的实验结果进行了比较,研究结果表明考虑进口速度的脉动能够更加合理地预测和分析床内流体动力行为.
参考文献
[1] | Kuipers J A M;Prins W;Van Swaaij W P M .Theoretical and Experimental Bubble Formation at a Single Orifice in a Two-Dimensional Gas-Fluidized Bed[J].Chemical Engineering Science,1991,46(11):2881-2894. |
[2] | He Yurong;Lu Huilin;Sun Qiaoqun .Hydrodynamics of gas-solid flow around immersed tubes in bubbling fluidized beds[J].Powder Technology,2004(2):88-105. |
[3] | Lu HL.;He YR.;Gidaspow D. .Hydrodynamic modelling of binary mixture in a gas bubbling fluidized bed using the kinetic theory of granular flow[J].Chemical Engineering Science,2003(7):1197-1205. |
[4] | Takuya Tsuji;Keizo Yabumoto;Toshitsugu Tanaka .Spontaneous structures in three-dimensional bubbling gas-fluidized bed by parallel DEM-CFD coupling simulation[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2008(2):132-140. |
[5] | WU Chun-liang,ZHAN Jie-min.NUMERICAL PREDICTION OF PARTICLE MIXING BEHAVIOR IN A BUBBLING FLUIDIZED BED[J].水动力学研究与进展,B辑,2007(03):335-341. |
[6] | Lu HL;Shen ZH;Ding JM;Xiang L;Liu HP .Numerical simulation of bubble and particles motions in a bubbling fluidized bed using direct simulation Monte-Carlo method[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2006(3):159-171. |
[7] | Gidaspow D.Multiphase Flow and Fluidization:Continuum and Kinetic Theory Descriptions[M].Academic Press,Inc,1994 |
[8] | Bagnold R A.Experiments on a Gravity-Free Dispersion of Large Solid Spheres in a Newtonian Fluid Under Shear[M].London,1954:49-63. |
[9] | Koch D L;Sangani A S .Particle Pressure and Marginal Stability Limits for a Homogenous Monodisperse GasFluidized Bed:Kinetic Theory and Numerical Simulations[J].Journal of Fluid Mechanics,1999,400:229-263. |
[10] | Ergun S .Fluid Flow through Packed Columns[J].Chemical Engineering Progress,1952,48(02):89-94. |
[11] | Wen C Y;Yu Y H .A Generalized Method for Predicting the Minimum Fluidized Velocity[J].AICHE Journal,1966,12(03):610-612. |
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