| 粘性涡方法在多圆柱绕流数值模拟中的应用 |
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| 引用本文： | 刘晶昌,KitLam,徐建中.粘性涡方法在多圆柱绕流数值模拟中的应用[J].工程热物理学报,1998(2). |
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| 作者姓名： | 刘晶昌 KitLam 徐建中 |
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| 作者单位： | 中国科学院工程热物理研究所!北京，100080，TheHongKongPolytechnicUniversity，中国科学院工程热物理研究所!北京，100080 |
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| 基金项目： | 国家自然科学基金，教委博士点专项基金 |
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| 摘 要： | 用粘性涡方法求解了涡量速度形式的二维不可压缩Navier—Stokes方程．利用分步方法分别求解无粘的对流运动和粘性扩散，粘性扩散用随机走步方法来处理，利用涡量交换技术来满足无滑移边界条件，同时为进一步减少计算量，在求解对流速度时，采用了多极子展开法加速技术使得计算量由N2的量级减少到NlogN的量级．数值模拟了单圆柱和双圆柱纵向排列的绕流流场．
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| 关 键 词： | 粘性涡方法 Navier－Stokes方程 |
A NAVIER-STOKES SIMULATION OF FLOW A ROUND CIRCULAR CYLINDERS BY VISCOUS VORTEX METHOD |
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| Liu Jingchang, Kit Lain, Xu Jianzhong.A NAVIER-STOKES SIMULATION OF FLOW A ROUND CIRCULAR CYLINDERS BY VISCOUS VORTEX METHOD[J].Journal of Engineering Thermophysics,1998(2). |
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| Authors: | Liu Jingchang Kit Lain Xu Jianzhong |
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| Abstract: | The vorticity-velocity formulation of the Navier-Stokes equations are solved by viscousvortex method. The fractional step technique has been used. The viscous diffusion is treatedby a random walk method, the no-slip condition is not always enforced by the generationof new vortices at the boundary but instead by modifying the strength of the vortices inthe vicinity of the boundary; Particle-Box method is used to reduce the operation counts toO(Nlog N) from O(N2 ). The time dependent viscous flow around a circular cylinder andtwo circular cylinders in tandem arrangement of difference spacing at Reynolds numbers ofRe=3000 is presented. |
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| Keywords: | viscous vortex method Navier-Stokes equations |
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