The meeting was called to order at 2:00pm. The attendees are listed below.
The minutes of the last meeting, in Reno 15 January 2002 were approved as posted on the Web.
Ray also noted that Peter Wilson (the guiding force behind formatting the standard for ISO acceptance) will be retiring at the end of 2003.
After some discussion it was decided to move a proposed CGNS
committee review of the ISO drafts to the fall of 2002. This
is to accommodate attendance and hosting by the US lead ISO
representative, having the drafts further, and more information
about a potential combination of the fluids and finite element
We had an invitation to participate in a panel session at the Grid Generation Conference in Hawaii in June 2002. John Chawner indicated that he was planning to attend and offered to represent the committee on the panel.
Marc Poinot will be presenting a paper on pyCGNS at the
Aerospace PDE conference in Amsterdam. We offered to provide
any CGNS material that might help him in his presentation.
There were some issues checking in new code to CVS from a PC system. These involved the different handling of <CR> between PC and Unix. The CVS system flagged these as differences, resulting in 100% changes for code being checked in. This defeats the purpose of the history tracking, so all routines were checked in through a Unix system. David Edwards and Diane Poirier will draft an update procedure to guide future efforts.
Diane sent out a message to all registered users. Of 599 sent, 118 were not found. She is 'cleaning out' the registered user list.
Bob Bush briefly summarized recent activity for turbomachinery extensions including Rotating Coordinates, Periodic Boundary Conditions, and Interface Type. Dave Schowalter expressed interest in these extensions. He will look at the latest updates on the web, and Bob Bush will try to tie him into future discussions.
Marc Poinot briefly described his extensions of the ADF library to include the ability to maintain an in-memory representation of the tree. This should facilitate MPI implementations. The extensions were implemented as a small number of new calls that can be used in place of existing calls. The new calls provide the ability to specify if the data is in memory or on disk. Shawn Fuller indicated that he has used the extensions, but that the level of parallelism is too coarse for his immediate needs. Marc has provided the libraries and documentation on the web, and we have provided links to the site from the CGNS site. We will extend the ADF library to include these capabilities depending on usage and user experience.
There was brief discussion on extending the units to include a
number unit (moles) and charge unit (electron). Thus far, we do
not have an immediate need to make these extensions, so we will
wait. In addition, the ISO standards should have a definition
of various units. Ray Cosner will track down how and what units
are tracked by the ISO community. This can be incorporated into
CGNS, or we can wait until the ISO capabilities are available.
Manuel Kessler has loaded the C++ interface on the web via sourceforge. We will add a link to the CGNS web site to this library and its documentation. Manuel would be very interested in any feedback that anyone can provide.
Bruce Wedan introduced himself and briefly described his Tcl/Tk ADF viewer. Chris Rumsey and Diane Poirier have used the viewer and like it's functionality. The viewer is based strictly on ADF, but knows about some CGNS structures. The viewer has been posted on the web under the Utilities page. Bruce will look at packaging a self extracting NT version also.
Christian Lundh has also contributed a viewer via CGNSTalk. He was not available at the telecon, and no one present has experience with his viewer.
There was some discussion of if we could use this or a similar
capability to make money to support committee activities
(development, support, etc.). Since we are a sub-committee of
the AIAA, and they have many commercial products, perhaps there
is an avenue to pursue. It was also noted that we must respect
the wishes of the developers who may have intended software to
remain Open Source. This will require further discussion, and a
There being no additional issues, the meeting was adjourned.