论文部分内容阅读
在一种简单的边界加密的坐标变换下 ,用高精度的差分法研究了温盐双扩散系统 .为了保证求解的稳定性和精确性 ,对流项采用了四阶精度的迎风格式 ,扩散项和涡量方程的浮力项则采用四阶精度的中心差 .首先针对温度占优 (Rρ=0 32 )和盐度占优 (Rρ=1 6 8)的情形进行了计算 ,得到了与文献 [2 ]和 [12 ]一致的结果 ,从而验证方法的正确性 .其次系统地给出了不同Lewis数下的流动形态 ,包括稳定的对称结构、周期性振荡结构和非周期非对称的随机运动形态
In a simple boundary-warped coordinate transformation, the temperature-salt dual diffusion system is studied by a high-precision difference method. In order to ensure the stability and accuracy of the solution, the fourth-order accuracy of the upwind scheme, diffusion term and For the buoyancy term of vorticity equation, the center difference of the fourth-order accuracy is adopted.Firstly, the case of temperature dominant (Rρ = 0 32) and salinity dominant (Rρ = 168) ] And [12] to verify the correctness of the method.Secondly, the flow patterns under different Lewis numbers are given systematically, including the stable symmetrical structure, the periodic oscillatory structure and the non-periodic asymmetric random motion patterns