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．
A penalty upwind finite element method is adopted to deal with the thermohalinedouble-diffusive system.The method has good stability and second-order accuracy. Naturalconvection with lateral heating in a square rectangular enclosure can be examined by this way, andit's solutions approximatc 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 now results depend on the magnitude of the thermal buoyancy ratio N and the baffle.
出处
《计算物理》
CSCD
北大核心
1994年第4期489-497,共9页
Chinese Journal of Computational Physics
基金
国家自然科学基金
关键词
温盐双扩散系统
罚函数迎风有限元法
对流扩散
thermohaline double diffusive system,penalty upwind finite element method,convection-diffusion.
