排序方式: 共有11条查询结果,搜索用时 15 毫秒
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将Hui等人提出的统一坐标系推广到轴对称欧拉方程,讨论统一坐标系下的轴对称欧拉方程的解法,并通过数值算例证明轴对称统一坐标系的优越性. 相似文献
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将近年发展起来的用于Euler方程求解的具有局部均匀网格总体非结构特性的笛卡尔网格法推广到NS方程的求解。为了与流场的各向异性相适应、减少网格点数量,提出了一种各向异性网格加密法。另外还研究了分级笛卡尔网格对内点格式稳定性的影响和插值固体边界条件的稳定性。数值结果表明各向异性笛卡尔网格法相对于传统的各向同性网格方法能大量节省网格点数量而且与后者具有同样的精度。 相似文献
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The slipflow model is usually used to study microflows when the Knudsen number lies between 0.01 and 0.1. The instability
due to microscale effect seems to have never been studied before. In this paper we present preliminary results for the instability
(not physical instability) of this model when applied to microchannel flow with a vanishing Reynolds number. The present paper
is restricted to symmetrical mode. Both first-order and second-order slip boundary conditions will be considered.
The project supported by the National Natural Science Foundation of China (10025210) and Tsinghua Project for Basic Research
(2002) 相似文献
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吴子牛 《Acta Mechanica Sinica》2003,19(3):213-219
The development of the Stokes layer in a liquid subjected to a constant shear force at the liquid surface with mass erosion
is studied in this paper. It is shown that the velocity in the Stokes layer is weakened by surface receding and the relative
decrease of the maximal liquid velocity due to surface recession is a unique function of the time normalized by the recession/diffusion
balance time scale, defined as the ratio between the kinematic viscosity and the square of the receding velocity. At a time
much larger than the diffusion/recession balance time scale, the role of the surface receding is rather important: instead
of being pushed into the liquid at the receding velocity, the development of the Stokes layer is effectively prohibited by
surface receding.
The project supported by the National Natural Science Foundation of China (10025210) and the China NKBRSF project (2001CB409600) 相似文献
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流体力学分区算法及相关理论问题 总被引:4,自引:0,他引:4
分区计算是计算流体力学中处理复杂几何区域、多块物体相互运动和进行并行计算的一类重要方法.对分区算法、相关理论问题和一些数值现象进行了综述. 相似文献
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一般超音速过渡区气动特性的桥函数方法 总被引:1,自引:0,他引:1
桥函数方法已经成功应用于高超音速过渡区气动力计算,但其在一般超音速过渡区领域的适应性问题还缺乏研究.通过DSMC方法,研究适用于计算一般超音速飞行器的过渡区气动力系数的桥函数方法.经过对不同马赫数和不同努森数条件下,圆柱和钝头双楔体过渡区绕流的计算,发现erf-log桥函数方法在计算一般超音速过渡区气动力系数方面具有很好的精度.该结论在把桥函数方法推广到马赫数较低的亚轨道飞行器的过渡区气动力计算方面,具有一定的参考意义. 相似文献