Hostname: page-component-77c89778f8-vpsfw Total loading time: 0 Render date: 2024-07-24T12:31:35.307Z Has data issue: false hasContentIssue false

The NASA tetrahedral unstructured software system (TetrUSS)

Published online by Cambridge University Press:  04 July 2016

N. T. Frink
NASA Langley Research Center, Hampton, Virginia, USA
S. Z. Pirzadeh
NASA Langley Research Center, Hampton, Virginia, USA
P. C. Parikh
NASA Langley Research Center, Hampton, Virginia, USA
M. J. Pandya
Paragon Research, Hampton, Virginia, USA
M. K. Bhat
Paragon Research, Hampton, Virginia, USA


The NASA tetrahedral unstructured software system (TetrUSS) was developed during the 1990s to provide a rapid aerodynamic analysis and design capability to applied aerodynamicists. The system comprises of loosely integrated, user-friendly software that enables the application of advanced Euler and Navier-Stokes tetrahedral finite volume technology to complex aerodynamic problems. TetrUSS has matured well because of the generous feedback from many willing users representing a broad cross-section of background and skill levels. This paper presents an overview of the current capabilities of the TetrUSS system along with some representative results from selected applications.

Research Article
Copyright © Royal Aeronautical Society 2000 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)


1. Venkatakrishnan, V. A perspective on unstructured grid flow solvers. NASA CR 195025, February 1995.Google Scholar
2. Löhner, R. and Parikh, P. Three-dimensional grid generation by the advancing front method, Int J Num Meth Fluids, 1988, 8, pp 11351149.Google Scholar
3. Pirzadeh, S. Three-dimensional unstructured viscous grids by the advancing layers method, AIAA J, January 1996, 34, 1, pp 4349.Google Scholar
4. Marcum, D. and Weatherill, N. Unstructured grid generation using iterative point insertion and local reconnection. AIAA J, 1995, 33, p 1619.Google Scholar
5. Löhner, R. Generation of unstructured grids suitable for RANS calculations. AIAA Paper 99-3251, 1999.Google Scholar
6. Hassan, O., Morgan, K., Probert, E. and Peraire, J. Unstructured tetrahedral mesh generation for three-dimensional viscous flows, Int J Num Meth Eng, 1996, 39, pp 549567.Google Scholar
7. Samareh, J. GridTool: A surface modelling and grid generation tool, Proceedings of the Workshop on Surface Modelling, Grid Generation, and Related Issues in CFD Solutions, NASA CP-3291, 9-11 May 1995.Google Scholar
8. IGES: Initial Graphics Exchange Specification (IGES 5.3, 1996), US Product Data Association, Charleston, SC, 1994.Google Scholar
9. Pirzadeh, S. Structured background grids for generation of unstructured grids by advancing front method, AIM J, February 1993, 31, 2, pp 257265.Google Scholar
10. Pirzadeh, S. Unstructured viscous grid generation by advancing-layers method, AIM J, August 1994, 32, 8, pp 17351737.Google Scholar
11. Frink, N. Upwind scheme for solving the Euler equations on unstructured tetrahedral meshes, AIAA J, January 1992, (1), pp 7077.Google Scholar
12. Frink, N. Tetrahedral unstructured Navier-Stokes method for turbulent flows, AIAA J, November 1998, 36, 11, pp 19751982.Google Scholar
13. Roe, P. Characteristic based schemes for the Euler equations, Annual Review of Fluid Mechanics, 1986, 18, pp 337365.Google Scholar
14. Frink, N. Recent progress toward a three-dimensional unstructured Navier-Stokes flow solver, AIAA 94-0061, January 1994.Google Scholar
15. Anderson, W. and Bonhaus, D. An implicit upwind algorithm for computing turbulent flows on unstructured grids, Computers Fluids, 1994, 23, l,pp 121.Google Scholar
16. Spalart, P. and Allmaras, S. A one-equation turbulence model for aerodynamic flows, AIAA Paper 92-0439, January 1992.Google Scholar
17. Frink, N., Pirzadeh, S. and Parikh, P. An unstructured-grid software system for solving complex aerodynamic problems, NASA CP-3291, 9-11 May 1995, pp 289308.Google Scholar
18. Hartwich, P. and Frink, N. Estimation of propulsion effects on transonic flows over a hypersonic configuration, AIAA Paper 92-0523, 6-9 January 1992.Google Scholar
19. Pandya, M., Bhat, M. and Parikh, P. Application of unstructured grid methodology to rotorcraft flows. AHS-97, Presented at the American Helicopter Society Rotorcraft Acoustics and Aerodynamics Specialists Meeting, Williamsburg, Virginia, 28-30 October 1997.Google Scholar
20. Bhat, M. and Parikh, P. Parallel implementation of an unstructured grid-based Navier-Stokes solver. AIAA 99-0663, January 1999.Google Scholar
21. Karypis, G. and Kumar, V. Metis: A software package for partitioning unstructured graphs, partitioning meshes, and computing fill-reducing ordering of sparse matrices, version 3.0.3. University of Minnesota, November 1997.Google Scholar
22. Pandya, M. Low-speed preconditioning for an unstructured grid Navier-Stokes solver, AIAA 99-3134, June 1999.Google Scholar
23. Weiss, J. and Smith, W. Preconditioning applied to variable and constant density flows, AIAA J, November 1995, 33, 11, pp 20502057.Google Scholar
24. Parikh, P. Development of a modular aerodynamic design system based on unstructured grids, AIAA 97-0172, January 1997.Google Scholar
25. Cavallo, P. Coupling Static Aeroelastic Predictions with an Unstructured-Grid Euler/Interacting Boundary Layer Method, Master's Thesis for The George Washington University, July 1995.Google Scholar
26. campbell, R. Efficient viscous design of realistic aircraft configurations, AIAA 98-2539, June 1998.Google Scholar
27. Smith, W. Improved Pressure and Lift Predictions in Transonic Flow Using an Unstructured Mesh Euler Method with an Interacting Boundary Layer, Master's Thesis for The George Washington University, July 1994.Google Scholar
28. Giles, G. Further generalisation of an equivalent plate representation for aircraft structural analysis, J Aircr, January 1989, 26, pp 6774.Google Scholar
29. guruswamy, G. User's guide for ENSAERO-A multidisciplinary programme for fluid-structures-control interaction studies of aircraft, NASATM 108853, October 1994.Google Scholar
30. Cebeci, T, Clark, R, Chang, K, Halsey, N and Lee, K. Airfoils with separation and the resulting wakes, J Fluid Mech, 1986, 163, pp 323347.Google Scholar
31. Green, J., Weeks, D. and Brooman, J. Prediction of turbulent boundary layers and wakes in compressible flow by a lag entrainment method, RAE Technical Report 72231, 1973.Google Scholar
32. Parikh, P., Pirzadeh, S. and Löhner, R. A package for 3D unstructured grid generation, finite-element flow solutions, and flow-field visualisation, NASA CR-182090, September 1990.Google Scholar
33. White, F. Viscous fluid flow, McGraw-Hill, ISBN 0-07-069710-8,1974.Google Scholar
34. Hummel, D. On the vortex formation over a slender wing at large angles of incidence, AGARD CP-247, High Angle of Attack Aerodynamics, Paper No 15, January 1979.Google Scholar
35. Krist, S., Biedron, R. and Rumsey, C. CFL3D User's manual (version 5.0). NASA/TM-1998-208444, June 1998.Google Scholar
36. Wai, J., Herling, W. and Muilenburg, D. Analysis of a joined-wing configuration, AIAA 94-0657, January 10-13, 1994.Google Scholar
37. Frink, N. and Pirzadeh, S. Tetrahedral finite-volume solutions to the Navier-Stokes equations on complex configurations, Int J Numer Meth Fluids, 1999, 31, pp 175-187. Also available as NASA/TM-1998- 208961, December 1998.Google Scholar
38. Hoph, J. Separation characteristics of the DWS-24 dispenser, the MK-84 LDGP, the 370-GAL tank (E)+pylon, and the generic missile (metric and pressure-instrumented) in the flow field of the F-16 aircraft, AEDC-TSR-94-1, February 1994.Google Scholar
39. Frink, N., Allison, D. and Parikh, P. Unstructured Navier-Stokes analysis of wind-tunnel aeroelastic effects on TCA Model 2. 1999 NASA High-Speed Research Programme Aerodynamic Performance Workshop, NASA/CP-1999-209704, December 1999,1, Part 1, pp 621- 640.Google Scholar
40. kuruvila, G., Hartwich, P. and Baker, M. The effect of aeroelasticity on the aerodynamic performance of the TCA. 1998 NASA High-Speed Research Programme Aerodynamic Performance Workshop, NASA/CP-1999-209692, December 1999, 1, Part 2, pp 1589-1648.Google Scholar
41. Pirzadeh, S. A solution adaptive technique using tetrahedral unstructured grids. ICAS Paper No 0262, presented at the 22nd International Congress of Aeronautical Sciences, Harrogate, UK, 27 August-1 September 2000.Google Scholar
42. Wang, Q., Massey, S., Abdol-hamid, K. and Frink, N. Solving Navier-Stokes equations with advanced turbulence models on three- dimensional unstructured grids, AIAA 99-1056, January 1999.Google Scholar
43. Jones, W. and Launder, B. The prediction of laminarisation with a two-equation model of turbulence, lnt J Heat Mass Transf, 1972, 15, pp 301314.Google Scholar
44. Girimaji, S. Fully-explicit and self-consistent algebraic Reynolds stress model, NASA CR-198243, 1995.Google Scholar