ANSYS, Inc. Release Notes

FLUENT |
7.3. Supported Platforms for ANSYS FLUENT 14.0   7.5. Limitations That No Longer Apply in ANSYS FLUENT 14.0
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7.4. Known Limitations in ANSYS FLUENT 14.0

The following is a list of known limitations in ANSYS FLUENT 14.0.

  • File import/export (for a list of supported files, please refer to the table in this section, under Third-party software)

    • Data export to Mechanical APDL result file is not available on the linx64 and linia64 platforms. (Mechanical APDL data export to .cdb file is available on all platforms)

    • When exporting EnSight Case Gold files for transient simulations, the solver cannot be switched between serial and parallel, and the number of compute nodes cannot be changed for a given parallel run. Otherwise, the exported EnSight Case Gold files for each time step will not be compatible

    • EnSight export with topology changes is not supported

    • To properly view Fieldview Unstructured (.fvuns) results from a parallel ANSYS FLUENT simulation

      • Mesh files must be exported from the parallel solver via the TUI command fieldview-unstruct-grid

      • Mesh and data files should all be exported from parallel ANSYS FLUENT sessions with the same number of nodes

    • Tecplot file import does not support the Tecplot360 file format

  • Mesh

    • Boundary zone extrusion is not possible from faces that have hanging nodes

    • The following features are incompatible with polyhedral cell types:

      • Moving/deforming mesh

  • Models

    • ANSYS FLUENT supports the Chemkin II format for Oppdif flamelet import only

    • The surface-to-surface (S2S) radiation model does not work with sliding and moving/deforming meshes

    • The work pile algorithm is not compatible with the wall film boundary condition

    • The shell conduction model is not applicable on moving walls

    • The heat exchanger model is not compatible with mesh adaption

    • The FLUENT/REACTION DESIGN KINetics coupling is not available on the win64 platform

    • DO-Energy coupling is recommended for large optical thickness cases (> 10) only

    • FMG initialization is not available with the shell conduction model

    • FMG initialization is not compatible with the unsteady solver

    • The MHD module is not compatible with Eulerian multiphase models

    • Bounded 2nd order discretization in time is not compatible with moving and deforming meshes.

    • When simulating porous media, the value of the Porosity (defined in the Fluid dialog box) cannot be 0 or 1 (i.e., it must be in between these values) if the non-equilibrium thermal model is enabled

    • When simulating porous media, the non-equilibrium thermal model is not supported with radiation and/or multiphase models

  • Parallel processing

    • These features are currently unavailable in the parallel solver:

      • Discrete transfer radiation model (DTRM)

      • Continuous Fiber Model (CFM) add-on module

      • Data export to non-native formats other than EnSight, FIELDVIEW, Tecplot, and the generic heat flux data file

  • Platform support and drivers

    • ANSYS FLUENT is not compatible with the job scheduler on HPC Server 2008 with the packaged version of HPMPI. The default MPI (MSMPI) should be used

    • The minimum OS requirements for Linux are SLES 10 or Red Hat Enterprise 5.0

    • The path name length to the cpropep.so library (including the lib name) is limited to 80 characters. (Linux Opteron cluster using Infiniband interconnect only)

    • On Linux platforms, including a space character in the current working directory path is not supported.

    • Visit the ANSYS Customer Portal for the latest Windows graphics FAQ. Version 2.0 or higher of .NET Framework must be installed in order to run ANSYS FLUENT on the winx64 platform.

    • On Windows platforms, if you are installing ANSYS FLUENT 14.0 on a machine already having ANSYS FLUENT 13.0, then after installing Platform and Intel MPI libraries from the pre-requisites, make sure to delete the environment variables MPI_ROOT (for Platform MPI) and I_MPI_ROOT (for Intel MPI), otherwise it will conflict while running ANSYS FLUENT 13.0 in parallel mode.

    • Remote Solver Facility (RSF) is no longer supported in ANSYS FLUENT.

  • Solver

    • The non-iterative time advancement (NITA) solver is applicable with only a limited set of models. See the ANSYS FLUENT User's Guide for more details.

    • NITA (using fractional time step method) is not compatible with porous media

    • The following models are not available for the density-based solvers:

      • Volume-of-fluid (VOF) model

      • Multiphase mixture model

      • Eulerian multiphase model

      • Non-premixed combustion model

      • Premixed combustion model

      • Partially premixed combustion model

      • Composition PDF transport model

      • Soot model

      • Rosseland radiation model

      • Melting/solidification model

      • Enhanced Coherent Flamelet model

      • Inert model: transport of inert species (EGR in IC engines)

      • Dense discrete phase model

      • Shell conduction model

      • Floating operating pressure

      • Spark ignition and auto-ignition models

      • Physical velocity formulation for porous media

      • Selective multigrid (SAMG)

    • The pressure-based coupled solver is not available with the following features:

      • Porous jump boundary condition

      • Fixed velocity

  • User-defined functions (UDFs)

    • Interpreted UDFs cannot be used while running in parallel with an Infiniband interconnect. The compiled UDF approach should be used in this case

  • Third-party software

    • FLUENT-Platform LSF integration is not supported on the MS Windows platform

    • FLUENT-SGE integration is supported only on Linux platforms

    • Wave and GT-Power coupling are available only with stand-alone ANSYS FLUENT and not in the Workbench environment

    • Wave is not supported on Windows 64–bit platforms

    • ANSYS FLUENT 14 uses the CHEMKIN-CFD KINetics library 2.4. This version no longer supports the linia64 platforms

    • GT-Power is supported on the 32- and 64-bit Linux and Windows platforms.

    • Supported versions of third party software are listed below:

       

      Third Party Software

      		 

      Supported Version

       

      Abaqus

      		 

      6.9

      Altair HYPERMESH

      5.1

       

      ANSOFT-MAXWELL

      		 

      15.0

       

      AVS

      		 

      5.0

      CGNS

      2.5–3

      CHEMKIN

      2.4

      Data Explorer

      4.2

      Ensight

      9.1.2

      EnSight 6 (TUI only)

      7.6

      EnSight Case Gold

      9.1.2

      FAST

      1.3

      Fieldview

      12.2.1

      Gambit

      2.4

      GT-POWER

      7.0

      HOOPS

      17.15

      I-DEAS

      IDEAS NX Series 11

      LSTC-DYNA

      970.0

      MPCCI

      3.0.5

      MPI-HP/Platform

      8.1.2

      MPI-Intel

      4.02

      MPI-OpenMPI

      1.3.3

      NASTRAN

      Bulk data input file - MSC.NASTRAN 2007

      PATRAN

      3.0

      PTC MECHANICA

      PTC/Mechanica Wildfire 4.0

      TECPLOT

      9.0 (Export). Tecplot file format, version 11.2 (Import)

      VKI

      3.6.0

      WAVE

      8.3

  • Other

    • The IRIS Image and HPGL hardcopy formats are no longer supported in ANSYS FLUENT

    • When using ANSYS FLUENT with the Remove Solve Manager (RSM):

      • Only one copy of a saved project that is in the pending state can reconnect successfully.

      • System Coupling is not supported.

      • Ansoft Coupling is not supported.

      • UDFs are supported with limitations as detailed in Submitting FLUENT Jobs to RSM in Workbench User Guide

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