Advanced Capabilities in GOMA 6.0 - Augmenting Conditions Automatic Continuation and Linear Stability Analysis

Technical Report · Sun Dec 01 04:00:00 EST 2013

DOI:https://doi.org/10.2172/1490545· OSTI ID:1490545

Schunk, Peter Randall ^[1]; Labreche, Duane A. ^[1]; Wilkes, Edward D. ^[1]; Hopkins, Matthew M. ^[1]; Sun, Amy Cha-Tien ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

This document describes the form and use of three supplemental capabilities added to Goma during 1998 -- augmenting conditions, automatic continuation and linear stability analysis. Augmenting conditions allow the addition of constraints and auxiliary conditions which describe the relationship between unknowns, boundary conditions, material properties and post-processing extracted quantities. Automatic continuation refers to a family of algorithms (zeroth and first order here, single and multi-parameter) that allow tracking steady-state solution paths as material parameters or boundary conditions are varied. The stability analysis capability in Goma uses the method of small disturbances and superposition of normal modes to test the stability of a steady- state flow, i.e., it determines if the disturbance grows or decays in time.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1490545
• Report Number(s): SAND--2015-0652; 671276
• Country of Publication: United States
• Language: English

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97 MATHEMATICS AND COMPUTING