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Upwind Finite-Volume Solution of Stochastic Burgers’ Equation

机译:随机Burgers方程的迎风有限体积解

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In this paper, a stochastic finite-volume solver based on polynomial chaos expansion is developed. The upwind scheme is used to avoid the numerical instabilities. The Burgers’ equation subjected to deterministic boundary conditions and random viscosity is solved. The solution uncertainty is quantified for different values of viscosity. Monte-Carlo simulations are used to validate and compare the developed solver. The mean, standard deviation and the probability distribution function (p.d.f) of the stochastic Burgers’ solution is quantified and the effect of some parameters is investigated. The large sparse linear system resulting from the stochastic solver is solved in parallel to enhance the performance. Also, Monte-Carlo simulations are done in parallel and the execution times are compared in both cases.
机译:本文开发了一种基于多项式混沌展开的随机有限体积求解器。上风方案用于避免数值不稳定性。求解确定性边界条件和随机粘度的Burgers方程。对于不同的粘度值,溶液不确定度被量化。蒙特卡洛模拟用于验证和比较开发的求解器。量化了随机Burgers解的均值,标准差和概率分布函数(p.d.f),并研究了一些参数的影响。并行求解由随机求解器产生的大型稀疏线性系统,以提高性能。同样,并行进行蒙特卡洛模拟,并比较两种情况下的执行时间。

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