高阶精度 meaning in English
higher order accuracy
Examples
- In this paper , we develop the high - order accurate essentially non - oscillatory ( eno ) schemes on one and two - dimensional structured meshes in the finite volume formulation , and discuss their applications in hyperbolic conservation laws
本文构造了一维、二维结构网格中的高阶精度基本无振荡( eno )有限体积格式，并且讨论了它在双曲守恒型方程中的应用。 - The above spatial and temporal discretization in the boundary , and two - directional average in the intersection , can satisfy completely n - s equations , and have high accuracy in the all computational regions
对边界上的空间微分采用高阶紧致差分格式离散，时间微分采用四阶时间推进处理，在交界处采用双向差分平均法，保证了整个计算域上的流动都满足navier - stokes方程，并具有高阶精度。 - In order to achieve a computer code with a maximum degree of vectorization , the numerical flux function must be written uniformly with sign function . to get higher order accuracy , the muscl interpolation functions are applied for van leer and roe schemes
Vanleer和roe格式摘要( abstraet )均采用muscl插值使格式具有高阶精度，并采用连续可微的vanalbada通量限制器，使格式具有良好的稳定性和收敛特性。 - In fluid field solving , the numerical flux is estimated using high - accuracy roe scheme with limiter . in time marching , we use dual - time stepping together with implicit lu - sgs scheme and get reasonable results efficiently . the difference of the fluid computation between single grid and overset grids lies in the dispose of the computation boundary
流场解算时,对流场数值通量的求解采用的是带限制器的高阶精度roe格式,时间推进采用了含双时间步长的隐式lu - sgs ( lower - uppersymmetricgauss - seidel )格式,提高了求解的效率。 - In this paper , high - order accurate weighted essentially non - oscillatory ( weno ) schemes are investigated and their applications in hyperbolic conservation laws are discussed . based on this , a new weno difference scheme which based on dispersion - relation - preserving relation is developed , and representative test cases with this scheme for computational aeroacoustics ( caa ) problems has been implemented and compared in order to test capability of wave capturing ; in addition , weno schemes generally do not converge at high order in the presence of contact discontinuity of euler equations , so a conservative front tracking technique coupling weno schemes and level set method to simulate the translating density profile is presented here , and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy
本文研究了高阶精度加权基本无振荡( weno )格式及其在双曲守恒律方程中的应用，在此基础上作了两个方面的工作：一是针对高频声波问题构造出一种基于保色散关系( drp )的weno有限差分格式，并对计算气动声学( caa )问题的代表性算例进行了大量数值实验，比较了该格式捕捉波数的能力；另外，针对高阶weno格式在处理euler方程的接触间断时精度有所降低的问题，研究了利用界面追踪技术levelset方法和高阶激波捕捉weno格式相结合的一种守恒追踪方法，并且给出有代表性的密度滑移面问题的算例，得到一致高阶精度的数值模拟结果。