Writing *.bc file through TUI |
Writing a boundary condition file through TUI poses the following problem.<br><br>Say a case consists of steady/unsteady profile. The user then tries to write a *.bc file for such a... |
Apply momentum source term in the given direction during 6DOF MDM simulation |
In certain situations, users need to apply momentum source term in the body-fixed coodinate system while the body is in 6 degree-of-freedom motion in the earth-fixed coordinate... |
POLYSTAT : unable do simultaneously display curves from different families (in DRAW STAT mode) |
In a session, the user successively defines probability and density-of-probability curves. After that, RUN and DRAW STAT functionalities are invoked. The first family of curves can be selected,... |
Setting Surface Monitors for Transient Case through TUI |
While setting the surface monitors through TUI for a Transient case following problem is observed.<br>In the GUI for surface monitors, there is an option for plotting. One can select under... |
Eliminating the need for multiple DEFINE_SOURCE UDFs |
Often, a problem has multiple source terms (continuity, energy, species, etc.) When UDFs are used for each to compute sources, it is cumbersome because separate DEFINE_SOURCE macros are often used... |
Modeling thermostat cycle operation in Airpak |
How we can simulate following problem in Airpak:<br><br>Whenever the room temperature went above a certain value, Airpak turned<br>off the heating air supply in the room. ... |
blower modeling notes |
The Body Fo<br>(1) Mesh Size<br><br>Don't under-resolve the blower. Make sure you have enough cells to adequately resolve all of the relevant geometry (e.g. blades, hub... |
FLUENT 6 - Printing to the GUI or to an output file from UDFs |
Output from a UDF using Message() only prints to the GUI. If the output is desired to go to a file, the fprintf function is commonly used. How can one easily switch between the two without... |
Icepak FAQ: How to convert Flotherm Model to Icepak |
Do you have any type of converter that we could use to convert Flotherm model files to Icepak?<br><br> In general you can use one of the two ways:<br><br> 1. Flotherm... |
POLYFLOW - Evaluating the force components vs. position on a screw (MST) |
How to get the profiles of forces on the screws along flow direction?<br><br>So far, there is no direct post-processor for evaluating the total force distribution (Fx, Fy, Fz) along... |
Boolean operations with Adaption Registers |
User's Guide contains the description of the operations which can be used through Adapt>Manage panel.<br>However, the names of these operations ("Mask"... |
How to get the volume of filled region in a VOF prolem in Fidap |
How to get the volume occupied by fluid region in a VOF prolem in Fidap<br>When you run a VOF simulation, the volume occupied by fluid region will be reported in FDSTAT file at each time... |
MixSim 2.0: cannot create or load model after installation of FLUENT 6.2.16 -- crash in fluent.exe |
On a Windows system, FLUENT 6.2.16 was installed in the same ...Fluent.Inc area as MixSim 2.0.<br>MixSim can still be launched.<br>The user selects "File --- New Model"... |
POLYDATA - error while loading shared libraries: libgtk-1.2.so.0: cannot open shared object file. No such file or directory |
When running POLYDATA or POLYFLOW, it may happen that shared libraries be not bound.<br>Presently, the user should perhaps ask the assistance of a system manager, and provide the following... |
POLYFLOW - How to recover the Trouton ratio of 3?
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<br>From the analytical point of view, when one uses tensorial form for the constitutive equation of a Newtonian fluid, one actually obtains the uniaxial elongational viscosity as predicted... |
FLUENT - Easy way to compute distances and vector direction from graphics |
Users have asked for an easy method to compute distances, vector components, and<br>unit vector starting from two points picked manually in FLUENT graphics window.<br>This Scheme... |
POLYMAT: evaluation of the norm of the deviation between data and model for the spectrum. |
How does POLYMAT evaluate the norm of the deviation between data and model for the spectrum?<br>Each experimental curve c is known as a list of (Xi,Yi_e), for i = 1,n. For each Xi, the... |
POLYFLOW - evaluation of a typical wall shear rate |
Considering a flow rate Q, and some geometric dimensions (width L, half height H, radius R), what is a typical wall shear rate g-dot?<br>The formulae below provide typical values; they... |
After Writing a Particle Tracking File it has zero bytes |
When running Fluent in Network Parallel and writing a particle tracking file you find that is has zero bytes when completed.<br><br>These are the steps necessary to take when writing... |
SetupCryptoClient:CryptAcquireContext(...) failed |
Attempting to Re-Register the MPICH username and password you receive this error:<br><br>SetupCryptoClient:CryptAcquireContext(...) failed, error:<br>-2146893809 Error Text:... |
Problem in Function Hooks panel, to hook cavitation udf, for a new case set up in Fluent 6.2 |
When a new case is set up in Fluent 6.2 for a cavitation problem with a udf, by default "Cavitation Mass Rate" option is not avialable, in Define-->User... |
POLYFLOW - loss of convergence for Darcy flow through a non-isotropic porous media |
When defining a non-isotropic porous media, e.g. with Pxy = Pyy = 0 for a 2D case, the calculation may diverge and shows oscillatory behaviour in the Darcy pressure.<br>When changing Pyy =... |
Post processing VOF cases with more than two phases |
In VOF problems with more than 2 phases, there is no direct variable to visualize all the three phases simultaneously. The custom field function below would help in visualizing all three phases... |
POLYFLOW - viscous heating for isothermal viscoelastic flow |
Can one evaluate the viscous dissipation and the dissipated power on the flow domain for a viscoelastic flow?<br><br>The user should ask for the post-calculation of both... |
POLYFLOW - how to obtain CSV information for a field on a restricted topological entity (e.g. a boundary)? |
How to obtain CSV information for a field on a restricted topological entity (e.g. a boundary)?<br>Create a sub-model on the required topological entity; vanishing forces (or vanishing flux)... |