A semi-Eulerian method for treating Lagrangian sliding interfaces

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Description

In many two-dimensional Lagrangian radiation hydrodynamic calculations, shear along material boundaries is a serious problem. Since the mesh is tied to the material, this shear will cause distortions in the mesh that make the calculations very difficult. The approach described in this paper adopts a semi-Eulerian calculation that allows material flow through a Lagrangian mesh along an interface. The basic idea is to consider each point along the slip line temporarily as a double point. One would then calculate the motion of each point separately and then pull the points back together using the automatic rezone method. This would allow ... continued below

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10 p.

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Lee, W.H. July 1, 1996.

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Description

In many two-dimensional Lagrangian radiation hydrodynamic calculations, shear along material boundaries is a serious problem. Since the mesh is tied to the material, this shear will cause distortions in the mesh that make the calculations very difficult. The approach described in this paper adopts a semi-Eulerian calculation that allows material flow through a Lagrangian mesh along an interface. The basic idea is to consider each point along the slip line temporarily as a double point. One would then calculate the motion of each point separately and then pull the points back together using the automatic rezone method. This would allow the materials to shear along the interface. This paper will describe the method as used in a two-dimensional Lagrangian code. The formation of a shaped charge jet is computed using the present method, and the results are discussed with and without the slip treatment.

Physical Description

10 p.

Notes

OSTI as DE96011287

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  • 3. international conference on computational structures technology, Budapest (Hungary), 21-23 Aug 1996

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  • Other: DE96011287
  • Report No.: LA-UR--96-1635
  • Report No.: CONF-960810--1
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/251413 | External Link
  • Office of Scientific & Technical Information Report Number: 251413
  • Archival Resource Key: ark:/67531/metadc669009

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  • July 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Feb. 26, 2016, 4:36 p.m.

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Lee, W.H. A semi-Eulerian method for treating Lagrangian sliding interfaces, report, July 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc669009/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.