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1. 中北大学环境与安全工程系
2. 山西省农业科学院,山西,太原,030051
3. ,山西,太原,030051
纸质出版:2005
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徐亚博, 常建忠, 王剑, 等. 立方球体坐标下余弦钟绕球平流的数值模拟[J]. 中北大学学报(自然科学版), 2005,(5).
徐亚博, 常建忠, 王剑, et al. Numerical Simulation of the Linear Advection of Cosine Bell on the Cube Sphere[J]. 2005, (5).
在立方球体坐标系下推导出浅水波方程的形式
使用M DQ方法和4阶R ung-K u tta方法求解该方程
计算了余弦钟绕球平流算例的三种情况
并且给出了该算例在立方球体坐标系下6个区间的速度矢量的表达式.为了解决由于边界插值所引起的数值不稳定性
引入了4阶的人工粘性项(-4).通过对测试方案的求解和分析
可以看出该方法的优点:①完全显式格式;②时间上的4阶精度;③仅仅通过改变一个参数就可以获得空间的高阶精度;④该数值方案有较强的适用性.
The formulations of the shallow water equations are deduced from the cube sphere coordinate in the paper.Using the modified differential quadrature(MDQ) special difference scheme and fourth order Runge-Kutta scheme to solve the shallow water equations
the vector velocity expressions of six regions in the linear advection of a cosine bell case are given from the cube sphere coordinate.The paper computes the three cases of the linear advection of a cosine bell.An explicit hyperdiffusion term (-
4
) was used to free the numerical solutions from the noise introduced at the internal boundaries by the interpolation procedure.The method features the following advantages: ① fully explicit;② fourth order of accuracy in time;③ high order of accuracy in space by changing only one parameter;④ robust in proceeding numerical problem.
R onch i C,Iacono R,Pao lucc i P S.A new m ethod for the so lu tion of partia l d ifferen tia l equations in spherica l geom e-try[J].J.Com pu t.Phys.,1996(124):93-114.
W illiam son D L,D rake J B,H ack J J,Jakob R,Sw arztauber P N.A standard test set for num erica l approx im ationsto the sha llow w ater equations in spherica l geom etry[J].J.Com pu t.Phys.,1992(102):211-224.
Jakob ch ien R,H ack J J,W illam son D L.Spetra l transform so lu tion to the sha llow w ater test set[J].J.Com pu t.Phys,1995(119):164-187.
H idetosh i N ish ida,N obuyuk i Satofuka.H igher-order so lu tions of square driven cav ity flow us ing a variab le-orderm u lti-grid m ethod[J].In ternationa l Journa l for N um erica lM ethods in Eng ineering,1992(34):637-653.
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