| 界面Rayleigh对流现象模拟的格子Boltzmann方法 |
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| 引用本文： | 梁博,袁希钢.界面Rayleigh对流现象模拟的格子Boltzmann方法[J].化学工程,2008,36(6). |
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| 作者姓名： | 梁博 袁希钢 |
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| 作者单位： | 天津大学,化学工程联合国家重点实验室,天津,300072 |
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| 摘 要： | 采用格子Boltzmann方法中带有双分布函数的LBGK模型,在介观尺度上实现了对气液传质过程中界面对流现象的模拟,比较了不同Sc数、Ra数以及有局部浓度扰动的界面溶质扩散,对发生界面Rayleigh对流的临界条件进行了研究,发现临界Ra数在1.0×104—2.0×104之间。模拟结果和已有实验现象一致,证明双分布的LBGK模型适用于界面对流及扩散现象的模拟。
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| 关 键 词： | 格子Boltzmann方法 LBGK模型 双分布模型 界面扩散 |
A Lattice-Boltzmann method for simulation of interfacial Rayleigh convection phenomenon |
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| LIANG Bo,YUAN Xi-gang.A Lattice-Boltzmann method for simulation of interfacial Rayleigh convection phenomenon[J].Chemical Engineering,2008,36(6). |
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| Authors: | LIANG Bo YUAN Xi-gang |
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| Abstract: | A second distribution function was introduced and coupled with the LBGK model for the Lattice Boltzmann method,and the interfacial convection phenomena in a gas-liquid mass transfer system was simulated. The influences of the Sc,Ra numbers and disturbed interfacial diffusion on interfacial Rayleigh convection were studied,and the critical value of Ra was within the range from 1.0×104 to 2.0×104.The simulated results are consistent with the previously observed experimental results,which demonstrates the suitability of the introduced LBGK model for the simulation of interfacial Rayleigh convection and mass diffusion. |
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| Keywords: | Lattice Boltzmann method LBGK model two distribution model interface diffuse |
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