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KNOWN ISSUE: Use of Residual Material model with fuel vapour (Class 3 Error)


SYMPTOM:<br>When running cases that combine premixed or partially premixed models for combustion with the Residual Material Model, the CFX-Solver can produce unphysical temperatures and may...

KNOWN ISSUE: Variables available for user defined particle drag


SYMPTOM:<br>Unintentionally, there is a limit on the variables that can be used in the Particle User Routine for specifying particle drag. The variables are limited to: fluid and particle...

KNOWN ISSUE: Failure of the ExportPoints feature in TurboGrid


SYMPTOM:<br>The TurboGrid ExportPoints feature fails with a message similar to:<br><br>Error: Failed to generate export data<br>Context: ansFClientBMExportPts::Execute...

KNOWN ISSUE: A Windows CCS or HPC job is queued even though there are enough free cores


SYMPTOM:<br>A job submitted to a Windows CCS or HPC queue is queued, even though there appears to be sufficient processors available to run the job.<br><br>PROBLEM:<br>The...

KNOWN ISSUE: Evaporation of wall film particles at dry wall (Class 3 Error)


SYMPTOM:<br>When using the wall film sub-model of the particle transport model, and the wall is dry, it is possible that particle temperatures may reach unphysically low values, or other...

KNOWN ISSUE: Parallel moving mesh calculations with domain interfaces (Class 3 Error)


SYMPTOM:<br>In a parallel moving mesh calculation in which a partition boundary intersects a domain interface, and there are no periodic boundaries or symmetry planes, it is possible for the...

KNOWN ISSUE: Fourier peak statistics are not working for charts in CFD-Post


SYMPTOM:<br>If a transient chart is set up to use a Fast Fourier Transform, then selecting the Statistics for a chart line or series should give list of the largest Fourier peaks. However,...

KNOWN ISSUE: Colouring of particle tracks plotted as tubes


SYMPTOM:<br>If particle tracks are plotted with the Track Type set to 'Tube' and the Colour set to 'Constant', then the tracks are plotted as black rather than...

KNOWN ISSUE: For multiphase Fluent cases, 'Velocity' is not the relative velocity in CFD-Post


SYMPTOM:<br>For results from a multiphase, multiple frame of reference simulation in Fluent, the variable named 'Velocity' is the velocity relative to the stationary frame, and...

KNOWN ISSUE: CFD-Post may crash when creating Vortex Core Regions


SYMPTOM:<br>For cases where a Vortex Core Region is created using the Swirling Discriminant method, CFD-Post may crash.<br><br>PROBLEM:<br>This is due to a coding error...

KNOWN ISSUE: Stream tubes/ribbons can appear twisted


SYMPTOM:<br>In many cases, CFD-Post can produce stream-tube and stream-ribbon plots that show a flow rotation in the direction of the stream which is not present. The effect manifests itself...

KNOWN ISSUE: Time and Timestep related expressions may not be updated for final timestep


SYMPTOM:<br>In a transient calculation, timestep related expressions such as 'Current Timestep', 'Accumulated Timestep' and 'Time' may not be...

KNOWN ISSUE: CFD-Post may crash when creating Surface Streamlines on multiple locators


SYMPTOM:<br>CFD-Post may crash when creating a streamline object of type Surface Streamline when defined on multiple locators. This could also happen on the same single locator name and...

KNOWN ISSUE: Vortex Core Regions not updated on timestep changes with Fluent results


SYMPTOM:<br>For transient Fluent cases, CFD-Post does not update the Vortex Core Region on changing the timestep.<br><br>PROBLEM:<br>This is due to an timestep update bug...

KNOWN ISSUE: CFD-Post fails to read a Fluent file if a cell zone name is the same as a fluid name


SYMPTOM:<br>A Fluent cas/dat file fails to read into CFD-Post with an error such as:<br><br>ERROR<br>Parent of new object ('/SCALAR VARIABLE:/DATA READER/CASE:Case...

KNOWN ISSUE: Inconsistent default temperature range for real gas specific heats (Class 3 Error)


SYMPTOM:<br>Incorrect specific heat values can be obtained in calculations with real gases. These errors will not be large, but will be relatively larger at low temperatures compared to high...

Class 3 Error

SYMPTOM:
The calculation of compressible or multiphase flows in rotating frames will give rise to solutions that are inconsistent with the equations in the documentation.

PROBLEM:
This is due to the documentation indicating that transient terms in the energy and momentum equations (just for the alternate rotation model) are on the relative frame total enthalpy and the relative velocity, when they should more correctly be on the rothalpy and absolute velocity respectively. The CFX Solver implicitly uses these latter variables in the tra


WORKAROUND:<br>No workaround is currently available.<br><br>FIXED IN:<br>The Solver is made consistent with the documentation in Release 11.0. The overall physical problem is fixed in Release...

KNOWN ISSUE: Using 1-way FSI with Fluent fails when the Mechanical system is solved


SYMPTOM:<br>If a 1-way FSI case is set up using a Fluent system connected to a Mechanical system in ANSYS Workbench, then sometimes the Mechanical system will fail to solve with an error...

KNOWN ISSUE: Using Fluent names for variables in CFD-Post gives some incorrect results for 2D cases (Class 3 Error)


SYMPTOM:<br>If a 2D Fluent file is loaded into CFD-Post with the option to "Translate variable names to CFX-Solver style names" turned OFF, then plots and calculations using...

KNOWN ISSUE: CFD-Post does not correctly open Fluent files if no path information is provided


SYMPTOM:<br>When the command line is used to start CFD-Post and open a Fluent file, then the results are not always opened correctly.<br><br>For example, the command...

KNOWN ISSUE: Surface of Revolution does not work properly when multiple results files are loaded


SYMPTOM:<br>Attempting to use a "Surface of Revolution" object in CFD-Post when there are two or more results files loaded can lead to messages such as:<br> ...

KNOWN ISSUE: Supersonic inlets of multicomponent flow or real gases (Class 3 Error)


SYMPTOM:<br>The conversion of total to static temperature using the Newton fit method (non-ideal gases, mixtures, etc.) fails on inlet boundaries with a specified total temperature and no...

KNOWN ISSUE: GGI CHT periodic boundaries give incorrect solutions (Class 3 Error)


SYMPTOM:<br>In a conjugate heat transfer case with periodic boundaries, then rotational or translational solid-solid interfaces, which are not 1-1, will give rise to incorrect...

KNOWN ISSUE: CFD-Post reports wrong heat flux for 1:1 CHT cases with radiation (Class 3 Error)


SYMPTOM:<br>When a CHT calculation is performed that includes radiation in the solid, and the interface type is set to either Automatic or 1:1, then the Heat Flux reported by CFD-Post on the...

KNOWN ISSUE: Geometry-related objects doesn't always update when the expression that they depend on is changed


SYMPTOM:<br>Geometry-related objects don't update when the expression they depend upon is changed in the Expression Editor.<br><br>PROBLEM:<br>If an expression is...