| Mixed Model for Silt-Laden Solid-Liquid Two-Phase Flows |
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| 作者姓名： | 唐学林 徐宇 吴玉林 |
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| 作者单位： | DepartmentofThermalEngineering,TsinghuaUniversity,Beijing100084,China |
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| 基金项目： | the National Natural Science Foundationof China(No.5 0 176 0 2 2 |
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| 摘 要： | The kinetic theory of molecular gases was used to derive the governing equations for dense solid-liquid two-phase flows from a microscopic flow characteristics viewpoint by multiplying the Boltzmann equation for each phase by property parameters and integrating over the velocity space. The particle collision term was derived from microscopic terms by comparison with dilute two-phase flow but with consideration of the collisions between particles for dense two-phase flow conditions and by assuming that the particle-phase velocity distribution obeys the Maxwell equations. Appropriate terms from the dilute two-phase governing equations were combined with the dense particle collision term to develop the governing equations for dense solid-liquid turbulent flows. The SIMPLEC algorithm and a staggered grid system were used to solve the discretized two-phase governing equations with a Reynolds averaged turbulence model. Dense solid-liquid turbulent two-phase flows were simulated for flow in a duct. The simulation results agree well with experimental data.
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| 关 键 词： | 动力学 固-液两相流 Boltzmann方程 SIMPLEC算法 |
Mixed Model for Silt-Laden Solid-Liquid Two-Phase Flows |
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| TANG Xuelin,XU Yu,WU Yulin.Mixed Model for Silt-Laden Solid-Liquid Two-Phase Flows[J].Tsinghua Science and Technology,2003,8(6):692-696. |
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| Authors: | TANG Xuelin XU Yu WU Yulin |
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| Institution: | TANG Xuelin,XU Yu,WU Yulin **Department of Thermal Engineering,Tsinghua University,Beijing 100084,China |
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| Abstract: | The kinetic theory of molecular gases was used to derive the governing equations for dense solid-liquid two-phase flows from a microscopic flow characteristics viewpoint by multiplying the Boltzmann equation for each phase by property parameters and integrating over the velocity space. The particle collision term was derived from microscopic terms by comparison with dilute two-phase flow but with consideration of the collisions between particles for dense two-phase flow conditions and by assuming that the particle-phase velocity distribution obeys the Maxwell equations. Appropriate terms from the dilute two-phase governing equations were combined with the dense particle collision term to develop the governing equations for dense solid-liquid turbulent flows. The SIMPLEC algorithm and a staggered grid system were used to solve the discretized two-phase governing equations with a Reynolds averaged turbulence model. Dense solid-liquid turbulent two-phase flows were simulated for flow in a duct. The simulation results agree well with experimental data. |
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| Keywords: | kinetic theory dense solid-liquid turbulent flows Boltzmann equation mixed model |
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