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气固两相三维圆柱绕流的直接数值模拟 被引量:8

DIRECT NUMERICAL SIMULATION OF GAS-SOLID TWO-PHASE 3D WAKE OF A CIRCULAR CYLINDER
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摘要 本文采用直接数值模拟(DNS)方法研究了气周两相三维圆柱绕流的涡量场和颗粒扩散,并着重讨论了圆柱绕流中卡门涡街的形成和涡结构的转捩过程。同时分析了圆柱绕流中不同Stokes数的颗粒在涡结构作用下的横向扩散。结果显示Stokes数为1的颗粒主要分布在流场大尺度涡结构的外边界,而Stokes数为0.01的颗粒在涡结构的作用下,在流场中充分混合。 Direct Numerical Simulation has been used in this paper to study the transition ot flow field and dispersion characteristic of particles in a thee-dimensional cylinder wake, and discussed the effect of large- scale vortexes to dispersion of particles. Based on the flow field results, we use one-coupling methods to study the mixing and the dispersing behaviors field of the particles in typical sizes in the gas-solid two-phase cylinder wake. We found that the particles whose St=0.01 completely reproduce the vorticity field, and whose St=l exhibit special dispersing rules, i.e. distributing uniformly around the vortex kernel.
出处 《工程热物理学报》 EI CAS CSCD 北大核心 2006年第5期808-810,共3页 Journal of Engineering Thermophysics
基金 国家自然科学基金重点资助项目(No.50236030) 浙江省自然科学基金重大项目资助(No.Z104314)
关键词 直接数值模拟 气固两相圆柱绕流 颗粒扩散 direct numerical simulation gas-solid two-phase cylinder wake particle dispersion
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参考文献8

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二级参考文献6

  • 1叶春明,吴文权.数值模拟圆柱统流旋涡生成、分离及演化[J].华东工业大学学报,1995,17(4):25-30. 被引量:7
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  • 6叶春明,博士学位论文,1995年

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