NASA OVERFLOW Overset Grid CFD Flow Solver

OVERFLOW is a Computational Fluid Dynamics (CFD) flow solver under development by NASA. It uses structured overset grids to simulate fluid flow, and is being used on projects for Aeronautics Research, Science, Space Technology, and Human Exploration Mission Directorates. The code is available to U.S. companies, universities, and individuals under an appropriate Software Usage Agreement.


Latest Release: Version 2.3e, 14 January 2022

Request OVERFLOW from the NASA Software Catalog

OVERFLOW User’s Manual (Download)

NASA users: Join the OVERFLOW email list (list Archives)

Non-NASA users: To join the OVERFLOW email list, send email to [LISTNAME]-join@lists.nasa.gov (no subject or body is needed). To unsubscribe, send email to [LISTNAME]-leave@lists.nasa.gov. (Unfortunately, list archives are not available.)

2010 OVERFLOW Training Class Viewgraphs (Introduction|Morning|Afternoon)

2014 OVERFLOW Training Class Viewgraphs (replaces 2010 Afternoon)

Selected Reference Papers

Companion NASA Overset Grid CFD Software:

New users may also wish to obtain Chimera Grid Tools (CGT) and Pegasus 5, both from NASA Ames Research Center. These packages are needed to run many of the test cases that come with OVERFLOW. CGT is a collection of software tools for grid generation, pre- and post-processing, and visualization, tailored for overset grid systems. Pegasus 5 is a program used to assemble overset grids.

Next Overset Grid Symposium – October 10-13, 2022, NASA Langley Research Center, Hampton, Virginia

Past Overset Grid Symposia (some with presentations available)

Recent Publications: