Download PDF by Olga V. Ushakova: Advances in grid generation

By Olga V. Ushakova

ISBN-10: 1594542732

ISBN-13: 9781594542732

Grid new release bargains with using grids (meshes) within the numerical answer of partial differential equations through finite parts, finite quantity, finite alterations and boundary parts. Grid iteration is utilized within the aerospace, mechanical engineering and clinical computing fields. This ebook offers new learn within the box.

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The corresponding procedures were borrowed mainly from [3] and extended in the course of the practical application of the package. The first example was taken from computations of the instability of an interface in­ teracting with a shock wave (see [ 1 7]). Fig. 9 shows an overall view of the rectangular computational domain and a fragment of the grid near the interface. The problem was posed An Elliptic Barrier-Type Grid Generator ... 9: The instability of the interface between aluminum (AI) and deuterium ice (DD): the computational domain (a) and a fragment of the grid (b) near the interface (dots).

Be taken from the previous time layer. The inner nodes of the initial grid are either taken directly from the grid of the previous time layer or obtained from the displacements of the boundary nodes at the current time step with the use of some interpolation procedure. As a result, the initial grid is, at worst, close to a convex one, which can be easily corrected by minimizing the function n- I m - l 4 Iv = L L L ( [C I - Jk ] i+ 1 /2,j + 1/2 � l �l �l CI ) 2 , (1) + + = m ax( O , / ) , with an appropriate value of > O .

The grid generator [6] significantly extended the possibilities of applying methods [3], which are based on reg­ ular grids with an explicit specification of boundaries between media as some of the grid lines, to the problems mentioned above. All three approaches have certain advantages and shortcomings, which are not discussed in this paper. As an example of applying the method [6], consider simulation of a collision of a thin foil with a cone target. Fig. l . l a shows the initial shape of the foil in cylindrical coordinates, and Fig.

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Advances in grid generation by Olga V. Ushakova

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