OPUS: A Fortran Program for Unsteady Opposed-Flowed Flames

Technical Report · Sat Jul 01 00:00:00 EDT 2000

DOI:https://doi.org/10.2172/759209· OSTI ID:759209

Im, H G; Raja, L L; Kee, R J; Lutz, A E; Petzold, L R

OPUS is a Fortran program for computing unsteady combustion problems in an opposed-flow configuration using one-dimensional similarity coordinate. The code is an extension of the steady counterpart, OPPDIF, to transient problems by modifying the formulation to accommodate gasdynamic compressibility effects, allowing high-accuracy time integration with adaptive time stepping. Time integration of the differential-algebraic system of equations is performed by the DASPK software package, while the Chemkin packages are used to compute chemical reaction rates and thermodynamic/transport properties. This document describes the details of the mathematical formulation and instruction for using the code.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 759209
• Report Number(s): SAND2000-8211; TRN: AH200029%%203
• Resource Relation: Other Information: PBD: 1 Jul 2000
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
O CODES
COMBUSTION KINETICS
FLAMES
UNSTEADY FLOW
DOCUMENTATION