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Title: Portably Performant and Conservative Mesh Adaptivity for Lagrangian Shock Dynamics.

Abstract

Abstract not provided.

Authors:
;  [1]; ; ; ;
  1. (RPI)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1424864
Report Number(s):
SAND2017-2166C
651222
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the SIAM CSE17 held February 27 - March 3, 2017 in Atlanta, Georgia, United States.
Country of Publication:
United States
Language:
English

Citation Formats

Ibanez, Daniel Alejandro, Shephard, Mark S., Voth, Thomas E., Love, Edward, Overfelt, James R., and Hansen, Glen. Portably Performant and Conservative Mesh Adaptivity for Lagrangian Shock Dynamics.. United States: N. p., 2017. Web.
Ibanez, Daniel Alejandro, Shephard, Mark S., Voth, Thomas E., Love, Edward, Overfelt, James R., & Hansen, Glen. Portably Performant and Conservative Mesh Adaptivity for Lagrangian Shock Dynamics.. United States.
Ibanez, Daniel Alejandro, Shephard, Mark S., Voth, Thomas E., Love, Edward, Overfelt, James R., and Hansen, Glen. Wed . "Portably Performant and Conservative Mesh Adaptivity for Lagrangian Shock Dynamics.". United States. doi:. https://www.osti.gov/servlets/purl/1424864.
@article{osti_1424864,
title = {Portably Performant and Conservative Mesh Adaptivity for Lagrangian Shock Dynamics.},
author = {Ibanez, Daniel Alejandro and Shephard, Mark S. and Voth, Thomas E. and Love, Edward and Overfelt, James R. and Hansen, Glen},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

Conference:
Other availability
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  • A new method for the solution of the unsteady Euler equations has been developed. The method combines staggered grid Lagrangian techniques with structured local adaptive mesh refinement (AMR). This method is a precursor to a more general adaptive arbitrary Lagrangian Eulerian (ALE-AMR) algorithm under development, which will facilitate the solution of problems currently at and beyond the boundary of soluble problems by traditional ALE methods by focusing computational resources where they are required. Many of the core issues involved in the development of the ALE-AMR method hinge upon the integration of AMR with a Lagrange step, which is the focusmore » of the work described here. The novel components of the method are mainly driven by the need to reconcile traditional AMR techniques, which are typically employed on stationary meshes with cell-centered quantities, with the staggered grids and grid motion employed by Lagrangian methods. These new algorithmic components are first developed in one dimension and are then generalized to two dimensions. Solutions of several model problems involving shock hydrodynamics are presented and discussed.« less
  • A new method that combines staggered grid Arbitrary Lagrangian-Eulerian (ALE) techniques with structured local adaptive mesh refinement (AMR) has been developed for solution of the Euler equations. This method facilitates the solution of problems currently at and beyond the boundary of soluble problems by traditional ALE methods by focusing computational resources where they are required through dynamic adaption. Many of the core issues involved in the development of the combined ALEAMR method hinge upon the integration of AMR with a staggered grid Lagrangian integration method. The novel components of the method are mainly driven by the need to reconcile traditionalmore » AMR techniques, which are typically employed on stationary meshes with cell-centered quantities, with the staggered grids and grid motion employed by Lagrangian methods. Numerical examples are presented which demonstrate the accuracy and efficiency of the method.« less
  • A Lagrangian technique for numerical fluid dynamics is described. This technique makes use of the Voronoi mesh to efficiently locate new neighbors, and it uses the dual (Delaunay) triangulation to define computational cells. This removes all topological restrictions and facilitates the solution of problems containing interfaces and multiple materials. To improve computational accuracy a mesh smoothing procedure is employed.
  • The method described here is one in which grid nodes are redistributed so that they are attracted towards regions of high solution activity. The major difficulty in attempting this arises from the degree of grid smoothness and orthogonality required by the flow solver. These requirements are met by suitable choice of grid equations, to be satisfied by the adapted grid, and by the inclusion of certain source terms, for added control in regions where grid movement is limited by the local geometry. The method has been coded for multiblock grids, so that complex configurations may be treated. It is demonstratedmore » here for inviscid supercritical flow with two test cases: an ONERA M6 wing with a rounded tip, and a forward-swept wing/fuselage configuration (M151).« less