首页> 外文会议>International Workshop on Computer Algebra in Scientific Computing(CASC 2005); 20050912-16; Kalamata(GR) >Generation of Orthogonal Grids on Curvilinear Trimmed Regions in Constant Time
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Generation of Orthogonal Grids on Curvilinear Trimmed Regions in Constant Time

机译:恒定时间在曲线修剪区域上生成正交网格

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We propose a new algorithm for the generation of orthogonal grids on regions bounded by arbitrary number of polynomial inequalities. Instead of calculation of the grid nodes positions for a particular region, we perform all calculations for general polynomials given with indeterminate coefficients. The first advantage of this approach is that the calculations can be performed only once and then used to generate grids on arbitrary regions and of arbitrary mesh size with constant computational costs. The second advantage of our algorithm is the avoidance of singularities, which occur while using the existing algebraic grid generation methods and lead to the intersection of grid lines. All symbolic calculation can be performed with general purpose Computer Algebra Systems, and expressions obtained in this way can be translated in Java/C++ code.
机译:我们提出了一种新算法,用于在任意数量的多项式不等式所包围的区域上生成正交网格。代替计算特定区域的网格节点位置,我们对具有不确定系数的一般多项式执行所有计算。这种方法的第一个优点是,计算只能执行一次,然后用于以恒定的计算成本在任意区域和任意网格大小上生成网格。我们算法的第二个优点是避免了奇异性,这种奇异性是在使用现有代数网格生成方法时发生的,并导致网格线的交集。可以使用通用计算机代数系统执行所有符号计算,并且可以将这种方式获得的表达式转换为Java / C ++代码。

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