Development and Application of New Algorithms for the Simulation of Viscous Compressible Flows with Moving Bodies in Three Dimensions

Abstract

Public reporting burden for this collection of information is estimated to average 1 hour per response, includini gathering and maintaining the data needed, and completing and reviewing the collection of information. Send collection of information, including suggestions for reducing this burden, to Washington Headquarters Service: Davis Highway, Suite 1204, Arlington, VA 22202-4302, and TITLE AND SUBTITLE Development and Application of New Algorithms for the Simulation of Viscous Compressible Flows with Moving Bodies in Three Dimensions AUTHOR(S)Rainald Lohner, Chi Yang and Juan R. Cebral FUNDING NUMBERSF49620-97-1-0032 PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)George Mason University CSI Fairfax, VA 22030-4444 PERFORMING ORGANIZATION REPORT NUMBER SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)Air Force Office of Scientific Research AFOSR/NM 801 N. Randolph Street, Rm 732 Arlington, VA 22203-1977 SPONSORING/MONITORING AGENCY REPORT NUMBERF49620-97-1-0032 SUPPLEMENTARY NOTES 12a. DISTRIBUTION AVAILABILITY STATEMENTApproved for public release; distribution unlimited. 12b. DISTRIBUTION CODE AIR FORCE OFRCE 01 ; SCiENTIRC RESEARCH (AFOSR) NOTICE OF TRANSMIT TAL DTIC. THIS TECHNICAL REPORT HAS BEEN REVÜWED ^ND IS APPROVED FOR PUBUC RELEASE ABSTRACT (Maximum 200 words)The overall objective of the research carried out over the last three years was the development of new algorithms for the efficient simulation of viscous compressible flows with moving bodies in three dimensions using unstructured grids. The development was based on current 3-D Euler/Navier-Stokes capabilities, and encompassed flow solvers, grid generation, fluid-structure interaction, the efficient use of supercomputer hardware, and new visualization capabilities. The research carried out over the last three years significantly advanced the state of the art in this area of CFD. The particular topics are treated below in detail. 00814. SUBJECT SUMMARYThe overall objective of the research carried out over the last three years was the development of new algorithms for the efficient simulation of viscous compressible flows with moving bodies in three dimensions using unstructured grids. The development was based on current 3-D Euler/Navier-Stokes capabilities, and encompassed flow solvers, grid generation, fluid-structure interaction, the efficient use of supercomputer hardware, and new visualization capabilities. The research carried out over the last three years significantly advanced the state of the art in this area of CFD. The particular topics are treated below in detail. FLOW SOLVERSFor the flow solvers, seven major developments took place over the course of this research effort: a) Implicit flow solvers; b) Better mesh moving strategies; c) Implementation of turbulence models; and d) Validation studies. Implicit Flow SolversImplicit flow solvers are considered essential for the efficient simulation of viscous, compressible, time-dependent flows. We developed a linearized implicit scheme that uses a Generalized Minimal RESiduals algo...