(CGNS Documentation Home Page)
(Steering Committee Charter)
(Overview and Entry-Level Document)
(A User's Guide to CGNS)
(Standard Interface Data Structures)
(SIDS-to-ADF File Mapping Manual)
(SIDS-to-HDF File Mapping Manual)
(ADF User's Guide)
(CGNS Tools and Utilities)
CGNS Steering Committee
15 May 2002
2:00pm Eastern Time
Telecon Number: (850) 240-9853, participant code: 557184
The meeting was called to order at 2:00pm EDT.
The attendees are listed below.
The minutes of the last telecon were approved as posted
on the Web.
- Charter Business - Bob Bush introduced two people who have
requested to attend Steering Committee meetings. These were:
Steven J. Massey, Eagle Aeronautics, Hampton, VA
John Bussoletti, Boeing Commercial Airplane Group
Steve Massey introduced himself and indicated that he would be
working on the NASA Langley contract (discussed in more detail
- ISO Status - Ray Cosner was not available but sent in an
e-mail indicating that there have been no ISO meetings since the
last telecon, so there is no update.
- Documentation - Bob Bush indicated that Jim French and Craig
Day have indicated that only 3 Steering Committee members have
voted thus far on the AIAA standard (re-format of the SIDS).
Bob encouraged all the Steering Committee Members to vote soon.
Bob will send a reminder to the Steering Committee members.
Charlie Towne gave an overview of the documentation status. He
indicated that there is a new Overview and Entry Level document,
and that all documents have been version controlled with
references to software version numbers.
John Chawner indicated that he might not be able to attend
the Grid Generation Conference in Hawaii, but that in any
event, CGNS would be represented on the panel discussion by
a representative from Pointwise. If John cannot attend, the
representative will be John Steinbrenner.
- Extensions - Chris Rumsey introduced the new Langley
sub-contracted effort to be performed by Eagle Aeronautics,
with ICEM CFD contributions. The effort will focus on three
areas. The largest will be the development of utilities to
support translation, node to cell conversion, primitive to
conservative variable conversion, etc. The other 2 areas will
be adding the ability to delete node children, and adding SIDS
based extensions. Bruce Wedan indicated that these capabilities
will be developed with a TCL/TK GUI and loosely coupled to the
"adfviewer" viewer that he wrote. The programming will be done
in C and so portable. The capabilities will be developed as a
series of independent programs callable from scripts or the GUI.
Todd Michal of Boeing indicated that they were interested some
old extensions that have not been implemented yet. Some of
these are in the current Langley sub-contract (Axi Symmetry,
Rotating Coordinates and Gravity), some need more definition
(Wall functions and Periodic BC's), and some are yet to be
proposed (frozen BC's, Bleed-Blowing BC's, Electro-Magnetic
extensions, and solution specific BC's). Boeing will take a
cut at defining the new extension proposals, and reviewing the
existing extension proposals.
Chris Rumsey reinforced the notion that we need to put more
fidelity into the extensions before they can be effectively
Diane Poirier proposed taking the beta status off the version
2.1 release. The value of NormalListFlag returned by
the function cg_boco_info has been modified. It was
previously set to 1 when NormalList was defined, and 0
when it was not. In this new version, if NormalList
exists, NormalListFlag is set to the number of data
contained in NormalList. However, this is seldom used
to date and should pose no problem. It was agreed to release
- Next Meeting - There will be an informal meeting at the
summer fluids conference in St. Louis the week of 24 June. The
tentative time is set for Monday evening, at 7:00. The room is
to be determined. We do not have much on the agenda, Bob Bush
will send out a request for topics and discussion items.
- Other - Todd Michal indicated that the Unstructured
Grid Consortium was continuing to make progress in defining
interfaces and an API between grid generation modules. The
consortium is using CGNS data structures as a guide for much of
the development. There should be a draft out soon for public
comment. Todd will send an announcement, with the web address
to Bob Bush to forward to the CGNS team.
There being no additional issues, the meeting was adjourned.