Coupled Fluid-Solid Interaction Under Shock Wave Loading: Part I - Statistic Interfaces

Journal Article · Wed Jul 01 04:00:00 EDT 2009 · Sandia journal manuscript; Not yet accepted for publication

OSTI ID:1426930

Tipton, David Gregory ^[1]; Christon, Mark Allen ^[2]; Ingber, Marc Stuart ^[3]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
2. CTO Offce, Dassault Systemes SIMULIA, Providence, RI (United States)
3. Univ. of New Mexico, Albuquerque, NM (United States). Department of Mechanical Engineering

Here, this paper is the first of two that consider the treatment of fluid-solid interaction problems under shock wave loading, where the solid experiences large bulk Lagrangian displacements. This work addresses the issues associated with using a level-set as a generalized interface for fluid-solid coupling where unstructured overlapping grids are used for the fluid and solid domains. In part-I of this work, we outline the formulation used for the edge-based unstructured-grid Euler solver in the context of the discontinuous-Galerkin method. The identification of the fluid-solid interface on the unstructured fluid mesh uses a super-sampled L² projection technique, that in conjunction with a Lagrangian interface position, permits fast identification of the interface and the concomitant imposition of boundary conditions. The use of a narrow-band approach for the identification of the wetted interface is presented with the details of the construction of interface conditions. A series of computations are presented to demonstrate the validity of the current approach on problems with static interfaces. In part-II, we present the coupled dynamic fluid-solid system, and present an explicit monolithic algorithm for the treatment of the fully-coupled system. The interface conditions associated with moving interfaces is considered, and a comparison of moving vs. static reference frames is used to evaluate the dynamic interface treatment. Finally, a series of two and and three-dimensional projectile and shock-body calculations are presented.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1426930
• Report Number(s): SAND--2009-4162J; 476575
• Journal Information: Sandia journal manuscript; Not yet accepted for publication, Journal Name: Sandia journal manuscript; Not yet accepted for publication; ISSN 9999-0014
• Publisher: Sandia
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
97 MATHEMATICS AND COMPUTING
Euler equations
Fluid-solid interaction
Riemann problem
discontinuous Galerkin
interface conditions
level-set
shock loading
super-sampled projection