计算物理 ›› 1994, Vol. 11 ›› Issue (4): 489-497.

• 论文 • 上一篇    下一篇

温盐双扩散系统对流扩散的罚函数迎风有限元模拟

张涤明, 李琳, 陈虹   

  1. 中山大学力学系, 广州 510275
  • 收稿日期:1993-05-15 修回日期:1994-03-22 出版日期:1994-12-25 发布日期:1994-12-25
  • 基金资助:
    国家自然科学基金

PENALTY UPWIND FINITE ELEMENT MODELING OF THERMOHALINE DOUBLE-DIFFUSIVE SYSTEM

Zhang Diming, Li Lin, Chen Hong   

  1. Zhong Shan University, Department of Mechanics, Guangzhou, 510275
  • Received:1993-05-15 Revised:1994-03-22 Online:1994-12-25 Published:1994-12-25

摘要: 对温盐双扩散系统的对流扩散问题采用了罚函数迎风有限元数值方法模拟。该方法具有稳定性好,二阶精度,可直接求解原始方程等优点,并用一个具有横向受热的方腔加以验证。所得定常结果和前人用速度压力法所做非定常结果的趋势很吻合。在此基础上,应用该方法对具有横向受热,设置障碍物的方腔中的温盐双扩散问题数值计算,得到了温度雷诺数Ra=106及热浮力比N=1,3,5,7下的流场、温度场和浓度场的情况,考察了N与障碍物的影响。

关键词: 温盐双扩散系统, 罚函数迎风有限元法, 对流扩散

Abstract: A penalty upwind finite element method is adopted to deal with the thermohaline double-diffusive system.The method has good stability and second-order accuracy. Natural convection with lateral heating in a square rectangular enclosure can be examined by this way, and it's solutions approximate to the results obtained with velocity-pressure Method. Afterwards, the method is employed for a two-dimensional, laminar, with lateral heating, steady double-diffusive convection partitioned by an adiabatic baffle. Main computation is for Ra=106 and thermal buoyancy ratio N= 1,3,5,7. Distinct flow results depend on the magnitude of the thermal buoyancy ratio N and the baffle.

Key words: thermohaline double diffusive system, penalty upwind finite element method, convection-diffusion

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