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fluent里:
Fluent Inc., the leading provider of CFD software and services, announces the latest release of its flagship software, FLUENT 6.2. This release features numerous enhancements that broaden the scope of aerospace and defense problems that can now be solved. In addition, beta testers have reported dramatic speed-ups ranging from two to ten-fold for transient simulations. With many commercial firsts and innovations in the CFD industry over the last 20 years, Fluent has established a reputation as the company that can make the aerospace and defense industry’s toughest problems tractable. Important enhancements in FLUENT 6.2 include:
Improvements to FLUENT’s Large Eddy Simulation (LES) and Detached Eddy Simulation (DES) turbulence models for more accurate predictions of aerodynamics and noise,
Expansion of FLUENT’s unique dynamic mesh capabilities, including the incorporation of a six-degrees-of-freedom solver for store release and stage separation simulations, and new techniques for modeling gear pumps and valves,
More robust rotor/stator simulations for gas turbine engines,
A new solar load model for studying aircraft cabin environments,
Dynamic mesh adaption for capturing traveling shocks accurately, for example, bow shocks in front of dropped stores and blast waves produced by the firing of tank rounds,
Improvements to the SST k-omega turbulence model for more accurate prediction of aerodynamic drag,
Fast, high resolution capture of free surfaces and other wave structures in marine applications as well as fuel tanks.
Commenting on the relevance of FLUENT 6.2 to the sector, Greg Stuckert, Director of Fluent’s Global Aerospace and Defense Market Segment said, “Our goal with this release is consistent with our past track record: to promote the productivity and success of our aerospace & defense clients with the most versatile CFD software available, solving routine problems quickly and efficiently, and difficult problems easily and accurately.”
gambit:
GAMBIT Version 2.2.30 Release Notes
========================================
GAMBIT 2.2 includes significant improvements in key geometry and meshing
operations, enhancements to existing features, and bug fixes.
NOTE: A list of all known and fixed defects in this release is accessible
in the GAMBIT Release Information section in the Fluent online User Services
Center. One of the known defects involves an application error (crash) upon
exit on some Windows operating systems. The crash does not affect the GAMBIT
database and can be ignored. An upgrade to Windows XP service pack 2 is
recommended.
Enhanced Features in GAMBIT 2.2 include:
* geometry enhancements, including:
o an upgrade of the ACIS geometry kernel,
o better import of IGES, STEP, Parasolid and native CATIA V4 files,
o improvements to the direct Pro/ENGINEER interface,
o enhanced healing and checking of imported geometry,
o face-connect improvements for automatic handling of gaps and overlaps,
o improvements to the cleanup tools,
o improvements to face-stitching operations,
o improvements to wireframe face creation;
* meshing enhancements, including:
o HexCore improvements to handle dangling faces,
o improvements to size-function speed,
o addition of a new size function based on an existing mesh,
o enhancement of the curvature size function to recognize edge curvature,
o improvements to boundary-layer operations,
o improvements to the PAVE meshing tool;
* miscellaneous enhancements, including:
o allowed importation of plug-in files
o G/Turbo enhancements,
o new defaults for tetrahedral meshing,
o a new startup icon for the Microsoft Windows desktop,
o the ability to repair corrupt databases,
o improvements to defaults descriptions,
o improved tolerance specification,
o improvements to the geometry summarize and sweep path operations,
o more-informative journal files,
o interpreter enhancements.
Enhanced Features
=============================
Geometry
****************
o The integration of an updated version of ACIS (R12) improves speed
and robustness of all geometric operations.
o New "interop" translators result in a better import of IGES, STEP,
Parasolid, and native CATIA V4 files. (NOTE: The license file must
contain the feature "geom-trans" available at no additional cost to
access the translators). Improvements will also allow users to obtain
upgraded translators as patches independent of the full GAMBIT release.
o Improvements to the direct Pro/ENGINEER interface include support for
Proe-WildFire. (NOTE: The direct Pro/ENGINEER interface in GAMBIT 2.2
is supported for both Pro/ENGINEER 2001 and ProE-Wildfire. The
interface with Wildfire is supported on Windows, Linux, HP, and Sun
platforms. The interface with Pro/Engineer 2001 is supported on all
platforms except Linux).
o Healing improvements include a new smooth-geometry option (for example,
in the Smooth/Heal Real Faces command). Geometry smoothing can help
replace bad geometry and/or reduce complexity of the geometry.
Tolerant modeling improvements include options for automatic removal
of small edges and sliver faces.
o The geometry check command is enhanced to allow for early detection of
geometry and topological issues.
o Face-connect functionality is enhanced to support T-Junction splits,
which helps to ensure connectivity among parts with gaps and overlaps.
o Cleanup tools improvements include new tools to detect and eliminate
duplicate geometry and improvements to existing cleanup tools.
Duplicate geometry cleanup include options to detect and fix
duplicate/coincident vertices, edges, faces and volumes. Improvements
to existing tools include better automated removal of short edges,
faster large angle cleanup, and additional face creation options for
cleaning up holes. Cleanup tools defaults are now better organized
and placed in a separate category.
o The face-stitch operation for volume creation is enhanced to accept
tolerance values. In addition, multiple real and/or virtual volumes
can be created in a single operation. When creating a single volume,
it is unnecessary to specify more than one of the faces in the set
of faces to be stitched together; GAMBIT automatically finds and uses
the other faces. (NOTE: A default flag is available to enable/disable
this behavior.) When creating multiple volumes in a single operation,
GAMBIT can automatically discard unneeded faces. Both real and virtual
face-stitch operations can handle internal voids and dangling faces.
o Wireframe face creation is enhanced to construct a real face from a set
of non-planar edges using the tolerant functionality.
Meshing
*********************
o The HexCore meshing tool is improved to handle volumes with internal
(dangling) faces.
o Size-function operations are two to five times faster in GAMBIT 2.2
compared to GAMBIT 2.1. Speed improvements are most significant for
proximity and curvature size functions.
o A new "meshed" size function is available to ensure a mesh with
desired growth from a pre-meshed boundary.
o The curvature size function now accepts both faces and edges as source
entities. It also allows automatic mesh refinement based on the edge
curvature.
o Boundary-layer improvements include smooth height transition for volume
boundary layers, and better element quality near internal corners due
to improvements in angle based smoothing. A default flag is also
available to deactivate size-function calculation during the temporary
display of boundary layers. Imprinting of both volume and surface
boundary layers are now controlled by a single default to ensure
consistent boundary layers definition.
o The PAVE meshing tool is improved to better handle variation in mesh
size of premeshed edges. A size function is automatically invoked if
the variation exceeds a limit that can be set by the user. Performance
when meshing a group of faces is also significantly improved. Interval
count is automatically adjusted to satisfy the requirements of even
numbers of intervals per loop.
Miscellaneous
***************************
o GAMBIT 2.2 allows the importation of plug-in files, which can be used
in conjunction with special GAMBIT functionality to create customized
modeling operations.
o G/Turbo enhancements include an application-specific template for
pumps and automatic volume creation from the turbo file. The
application-specific template, available as a plug-in file, automates
the entire process from geometry creation and meshing to solver
settings and the solution.
o New defaults for tetrahedral meshing allow modifications to
initialization attempts and refinement levels in order to improve
the success rate of mesh initialization and refinement.
o GAMBIT 2.2 installation offers a new startup icon for Microsoft
Windows operating systems. The GUI-based launcher supports browsers
for easy selection of working directory and the session identifier.
It also stores prior history and also allows standard startup options.
o Automatic repair of corrupt databases is available in GAMBIT 2.2.
The repair process requires saving the database multiple times. GAMBIT
issues a message indicating "database being repaired" while reading
a corrupt database. Users should repeat the save command several times
until there are no repair messages. (NOTE: If a similar message
appears while saving a "good" database, the message indicates that
a problem has been introduced during the last working session and
should be reported as a defect).
o Descriptions of many defaults have been enhanced to include specific
values used by the automatic settings. Documentation also includes
the applicable range for the values to provide a better guidance
to users.
o Tolerance specification fields on many forms are improved to be more
intuitive. Each field includes a toggle button to select either an
"auto" or "manual" option. For the manual option, the tolerance-value
input field is automatically populated with a default value to provide
a guidance for the user.
o Geometry-summarize information is better displayed in the Transcript
window to make the information more intuitive to read and understand.
The information includes face area for real geometry and volume for
cad entities. Sweep path alignment operations are improved to ensure
consistent behavior for both real and virtual sweeps.
o Journal file header is more informative and includes the database
version and platform information.
o Interpreter enhancements include new query functions that return number
and types of mesh elements, angle at a face vertex, and the Pro/E
parameters.
Platform Support Changes
===========================
GAMBIT 2.2 (and all later versions) will not be supported on the following
platforms.
---------------------------------------------------------------------------
Platform Processor/Series Operating System 32/64 Bit
---------------------------------------------------------------------------
AMD Athlon Red Hat Linux 7.2 32 bit
AMD Athlon Red Hat Linux 7.3 32 bit
IBM Power 3 AIX 4.3.3 32 bit
Compaq Alpha Tru64 UNIX 5.0A 64 bit
Compaq Alpha Tru64 UNIX 5.1 64 bit
Compaq Alpha Tru64 UNIX 5.1A 64 bit
PC-Intel Pentium Red Hat Linux 7.2 32 bit
PC-Intel Pentium Red Hat Linux 7.3 32 bit
PC-Intel Pentium Suse Linux 7.2 32 bit
PC-Intel Pentium Suse Linux 7.3 32 bit
PC-Intel Pentium Window NT 4.0 32 bit
----------------------------------------------------------------------------
NOTE: Version 7.1.1 is the supported version of Exceed for GAMBIT 2.2.
Exceed versions 8 and 9 are also compatible. A list of all supported platforms
for GAMBIT 2.2 is available on the Fluent Users Services Center.
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发表于 2007-6-11 09:19:49
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