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A study of moving mesh applied to a thin flame propagating in a detonator delay element

机译:雷管延迟元件中细火焰传播运动网格的研究

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摘要

We study the application of moving mesh methods to a one-dimensional (time dependent) detonator delay element problem. We consider moving mesh methods based on the equidistribution principle derived by Huang et al. [1]. Adaptive mesh methods have been widely used recently to solve time dependent partial differential equations having large solution gradients. Significant improvements in accuracy and efficiency are achieved by adapting the nodes (mesh points) so that they are concentrated about areas of large solution variations. Each system of equations for the moving mesh methods is solved in conjunction with the detonator problem. In this paper, the system of ordinary differential equations that results (after discretising in space) is solved using the double precision version of the stiff ordinary differential equation solver DASSL. The numerical results clearly demonstrate that the moving mesh methods are capable of tracking the deflagration wave as it travels down the detonator delay element more accurately and more efficiently than a fixed mesh method.
机译:我们研究了移动网格方法在一维(时间相关)雷管延迟元件问题中的应用。我们考虑基于Huang等人的等式分配原理的移动网格方法。 [1]。自适应网格方法最近已广泛用于解决具有较大解梯度的时间相关的偏微分方程。通过调整节点(网格点),使它们集中于解决方案变化较大的区域,可以显着提高准确性和效率。结合雷管问题解决了移动网格方法的每个方程组。在本文中,使用刚性常微分方程解算器DASSL的双精度版本对结果(在空间离散后)所得的常微分方程组进行了求解。数值结果清楚地表明,与固定网格方法相比,移动网格方法能够更准确,更高效地跟踪爆燃波沿着雷管延迟元件传播的过程。

著录项

  • 作者

    Basebi, T.; Thomas, Ruth M.;

  • 作者单位
  • 年度 2003
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类

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