User’s Manual for OVERFLOW 2.2

Version 2.2m, 13 October 2017

Robert H. Nichols
University of Alabama, Birmingham
Birmingham, AL 35294
 
Pieter G. Buning
NASA Langley Research Center
Hampton, VA 23681

Table of Contents

1. Introduction

1.1 Code History

1.2 OVERFLOW 2.2 Capabilities

1.3 Navier-Stokes Equation Implicit Solution Procedure

1.4 Low-Mach Number Preconditioning

1.5 Species Equations

1.6 Non-Dimensional Flow Variables

References

2. Requesting and Compiling OVERFLOW 2.2

2.1 Obtaining OVERFLOW 2.2

2.2 Compiling OVERFLOW 2.2

2.3 Recommended Companion Software

2.4 OVERFLOW Mailing List

References

3. OVERFLOW-Mode Operation

3.1 Required Input Files

3.2 Force/Moment Integration

3.3 NAMELIST Inputs

3.4 Turbulence Model Specifications

3.5 Variable  and Multispecies

3.6 Boundary Condition Specification

3.7 Unsteady Flow Output Options

3.8 Initializing the Solution

3.9 Running the Code

3.10 Test Cases

References

4. OVERFLOW-D-Mode Operation Without Grid Movement

4.1 Near-Body Grid Generation

4.2 Off-Body Grid Generation

4.3 X-Ray Specification

4.4 Grid Assembly using DCF

4.5 Grid Adaptation to Solution Error

References

5. OVERFLOW-D-Mode Operation With Grid Movement

5.1 Body Motion Non-Dimensionalization

5.2 Six-Degree-of-Freedom Motion Using &SIXINP

5.3 GMP XML Specification

5.4 GMP Prescribed Motion

5.5 GMP 6-DOF Motion

5.6 Using overgrid to Preview GMP Body Motion

5.7 Simulating Body Collisions

5.8 Moving-Body Output Files

5.9 Grid Adaptation to Body Motion

References

6. Debugging Tools

6.1 Turbulence Model Diagnostics (DEBUG=1)

6.2 Time Step Diagnostics (DEBUG=2)

6.3 Residual Diagnostics (DEBUG=3)

6.4 Solution Adaption Information (DEBUG=4)

7. Utility Codes

Appendix A. File Formats

Appendix B. NAMELIST Input

Appendix C. Boundary Condition Types

Appendix D. Viscous Region Specification

Appendix E. Rotorcraft Simulations (future)