When I try to use the Help for any CFX 10 application I get the message:
'Error return from Help Viewer: Initialise JARReader: Environment variable CFX5JAVA not set ' I cannot find anything about this variable in the installation manual, so can you tell me what I need to set. |
You need to install the SUN Java 2 Runtime Environment - available in the download and on the CFX 10.0 installation CD. Version 10 uses Java for Help whereas previous versions use Adobe Acrobat.
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How to calculate the frontal area of a convex closed surface?
Example application is the frontal area of a car, which is required to calculate the aerodynamic coefficients. |
The frontal area can be calculated with the following CEL:<br><br>IntegrationVariable = Normal X/abs(Normal X + 1e-8)<br>FrontalArea = 0.5 * areaInt_x( IntegrationVariable... |
SYMPTOM:
The specified Start Iteration List for transient statistics objects only appears to be honoured by the CFX Solver for the first variable in the list.
PROBLEM:
If a transient statistics object is requested and contains multiple variables, and the Start/Stop Iteration List contains fewer integers than variables, then all subsequent variables in the list will start collecting statistics at Timestep 1. Although this is by design (and is documented), a change in the behaviour for Release 10.0 SP1 has been made to make it more intuitive. The new behaviour is such that subsequent variables in the list will start collecting statistics at the last specified timestep in the Start Iteration List.
For example, suppose a transient statistics object contains Pressure and Velocity in the variables list, and the `Start Iteration List' was set to 500 as follows:
TRANSIENT STATISTICS: Transient Statistics 1
Option = Arithmetic Average
Output Variables List = Pressure, Velocity
Start Iteration List = 500
END
In Release 10.0 statistical calculations for Velocity would start at Timestep 1. In Release 10.0 SP1, they will start at Timestep 500. |
WORKAROUND:<br>Specify individual Start/Stop Iterations for each variable in thelist.<br><br>FIXED IN:<br>Release 10.0 SP1.
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Class 3 Error
SYMPTOM:
When a transient simulation is restarted, the transient statistics for some variables are incorrect.
PROBLEM:
This is a bug in the CFX Solver when restarting transient calculations where the transient statistics include Pressure or Velocity. For these variables, including statistical Reynolds Stresses calculated for LES and DES simulations, the values are re-initialised at the beginning of |
WORKAROUND:<br><br>FIXED IN:<br>Release 10.0 SP1.
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Is ICEM Hexa CAA available for HPUX11? |
ICEM developers are working on a port for HPUX, but it is not available as of October 25, 2005.<br>There is no specific time period as to when this will be available.
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Are there any examples demonstrating BEAM44 KEYOPT(7) end releases
in a full transient analysis? |
Yes, please see the attached ANSYS 10.0 simple example.<br><br><br><br><br>.
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Running the RSMSetupsetup.exe on the installation disk seems to complete successfully, however, RSMSetupCESetup.msi is not running properly. What is causing the CESetup.msi to fail? |
This is a known problem which happens when WB10 has NOT been installed on the machine. The easy work around is to install WB10 on the web server machine (just Simulation is enough) and uninstall... |
A customer notes that, in the ANSYS 10.0 Element Reference, SHELL93 does *not* list creep under "Special Features", but EPCR *is* listed in Table 91.2, "Element Output Definitions". Same for SHELL91. The documentation is inconsistent. Is creep a supported feature for these elements, or not? |
Development confirms that both SHELL91 and SHELL93 support creep. The ¿Special Features¿ lists in the element descriptions were incorrect. This documentation has been corrected for... |
I am having trouble getting a reaction for liquid injection. I have set up a reacting mixture and defined the reaction. My N2 scalar is set to constraint and all others are set to "Transport Equation". I have checked to make sure that the droplets are evaporating properly and they are. When I look for the reaction rate, the scalar does not exist, and no CO2 and H2O are being formed in the domain. My products are initialized to 0. |
<br><br>There are two things that could be preventing the fuel from burning:<br><br>1. The products limiter is active (i.e. Eddy Dissipation Model Coefficient B is set to... |
Q. Is there a simple example avaialble that demonstrates full fsi coupling between ANSYS and CFX where a temperature of heat flux is passed from ANSYS to CFX.
A. Yes, there is. It is contained in the attachment to this solution. |
Q. Is there a simple example avaialble that demonstrates full fsi coupling between ANSYS and CFX where a temperature of heat flux is passed from ANSYS to CFX.<br><br>A. Yes, there... |
Question:
I would like to determine how the critical angle can be calculated in ANSYS. The angle would be the angle of rotation of the structure about some point. The critical angle the maximum angle beyond which a structure becomes unstable & may topple under self weight.
Answer:
ANSYS can calculate the critical angle but it will require some work on the part of the user. The procedure is basically to calculate the location of the center of gravity using Inertia Relief and the PSOLVE command. It is necessary to use PSOLVE since ANSYS will only calculate the exact center of gravity during the solution phase; the inertia values that are printed out at the beginning of solution are approximations. Details for performing an Inertia Relief analysis may be found in the Structural Analysis Guide; details for the procedure may be found in the Theory Manual. Once the location of the center of gravity is determined, the critical angle would be found as the angle between the point or line of rotation and the center of gravity using standard trigonometry. |
Question:<br><br>I would like to determine how the critical angle can be calculated in ANSYS. The angle would be the angle of rotation of the structure about some point. The critical... |
How can I mesh a surface body in WB, using shell elements with an offset either from the bottom or from the top surface? |
Using WB 10.0, shell offset can be introduced to the mesh by means of a command snippet that is inserted under a surface body.<br><br>For... |
I have an entitlement to CFX-BladeGen and CFX-BladeGenPlus version 4.1 and would now like to use the new ANSYS BladeModeler version 10. How can I do this and do I still get all the functionality that I had with CFX-BladeGen and CFX-BladeGenPlus version 4.1 in the new software. |
ANSYS BladeModeler 10 is a new blade geometry creation product that is part of the ANSYS Workbench software suite and is available only on Windows platforms at version 10. ANSYS BladeModeler 10... |
I am running a multi-step analysis in Workbench. I inserted a command snippet that does some specialized postprocessing (writes some matrices of results items to text files) for each of 5 load steps. These matrices look correct for every load step. However, when examining the results objects within WB itself, the LS 1 and LS 5 results are identical even though the loading is different in each load step. I have written an ANSYS input file and have rerun the analysis in ANSYS (traditional) Environment and the results looks correct for every load step. Is this a bug in WB? |
This is not a bug. The command snippet that was inserted under Solution caused the 5th results set to be used for postprocessing LS 1. Here¿s how it works.<br><br>When the... |
How can I inject particles along a line in the CFX 10.0 solver? |
This can be achieved with some simple user Fortran. See the example below.<br><br><br>These two simple user subroutines allow particles to be injected along a line, something... |
What machine combinations would work when running multiple distributed parallel processes? |
<br>Review word document attached to this solution for details.
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How to setup resistance in porous region and how does Darcy's model related to information requested by CFX to setup a resistance? |
<br><br>Please review attached technical note.
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I have a very large def file from CFX 10.0
Every time I run CFX-Pre the size of my def file increases. How can I avoid this. |
In CFX10.0, when selecting to overwrite an existing def file in CFX-Pre, CFX-Pre will add to the def file instead of overwriting it.<br>This can lead to a very large def file.<br>The... |
What is the reason for the license server error message "licenses unsupported by licensed server", e.g. license status shows:
Users of acfx_pre: (Error: 2 licenses unsupported by licensed server) |
Check the FLEXLM hostid. Probably the FLEXLM hostid in the license key is different to the FLEXLM hostid of the license server. This may happen if keys for two different servers were merged... |
Q. Where can I find more information on CDB files and their use with CFX, including a description of the available CDWRITE options and the use of named components to represent boundary surfaces?
A. In the attachement to this solution. |
Q. Where can I find more information on CDB files and their use with CFX, including a description of the available CDWRITE options and the use of named components to represent boundary... |
I am trying to model a 10-step reaction where one of the reactions is H + O2 --> OH + O
This reaction leads to unrealistic species concentrations every time I turn it on. What can I do to improve convergence? |
<br><br>CFX10 has a stiff chemistry solver that should be used every time reactions with widely varying timescales are being solved. This solver linearization the chemical source... |
Are there any ANSYS LS-DYNA examples verifying BEAM161 cross sectional
properties? My beam deflections under bending do not appear to be correct. |
Yes, please see the attached ANSYS LS-DYNA 10.0 cantilever beam example.<br> The theoretical tip deflection is due to bending only, as the shear deflection<br> term is... |
Do you have any examples detailing how to get shear data out of
BEAM161 models in POST26? Standard ETABLE items do not work. |
Please see the attached ANSYS LS-DYNA 10.0 example. The ESOL<br> output available is shown in Table 161.3 "BEAM161 Item and<br> Sequence Numbers" in the ANSYS... |
I am trying to install ANSYS CFX 10.0 on Redhat Linux, but when I finish paging through the license
agreement, the installation script seems to stop at that point with the end of the license agreement
displayed. When I hit the space bar, nothing further happens. |
This problem has been seen on some Linux versions (Redhat 7.3, for example). The problem is that<br>the less command (which is used by the installation script to display the license... |
Is there any way to use tabular loads in an MSUP harmonic response analysis? |
As stated in the F command Notes section of the ANSYS 10.0 Commands<br> Reference, Tabular boundary conditions (VALUE = %tabname%) are not<br> supported in ANTYPE,HARMIC (MSUP or... |