FLUENT 6 - Converging a VOF mold filling simulation |
Converging VOF solutions may be challenging when the ratio of viscosity of the two fluids is far from 1.0.<br><br>Mold filling is a typical example of this problem. The injected... |
Tips on using "create planar tolerant face" in Gambit 2.2 |
Sometimes you will create a REAL tolerant face that looks fine after shading, and passes the geometry and topology checks; but upon meshing, the surface mesh will show undesired kinks and dimples.... |
Hex core mesh: Connectivity of tet mesh to hex core through pyramid |
Default settings in gambit does not generate transitional pyramid layers while making a hex core mesh. While generating a hex core mesh in gambit the default settings in gambit will generate a... |
Remeshing Overlapping zones in Tgrid |
Remeshing of overlapping zones in Tgrid sometimes gives segmentation violation.<br>This happens when the first zone is a bigger surface. So if you select a bigger surface first and a smaller... |
edge splitting |
Sometimes it is difficult to split virtual edges into two parts at a preferred location.<br>Mesh the edge and split it with a node. Go to the 'Split Meshed Edge' panel which is... |
How to avoid deformed moving zone for MDM with non-conformal interface |
When creating non conformal interface for surfaces which has boundary nodes at the same location, by default FLUENT will merge the boundary nodes. Therefore for Moving-Deforming mesh (MDM)... |
POLYFUSE - seems to hang when asking for writing the new mesh file |
When running POLYFUSE on Windows XP, the user chooses to write out the mesh file (in this case anyway), and the program appears to hang.<br><br>On windows XP, when the user chooses to... |
Scheme to print Total Heat Transfer Rate after desired number of iterations in a data file. |
Knowledge of heat imbalance is needed to check convergence in many cases. But this requires stopping the run which is not desirable. In parallel runs stopping and restarting the case may take... |
how to invert the color ramp |
How to invert a color ramp?<br>Let's say it's bgr.<br>Here is the procedure to invert the colors.<br><br>Select (click on) :<br><br>- Display... |
how to compute velocity wrt to local cylindrical coord. system |
QUESTION: How to compute values of radial and axial components at two exit planes<br>with respect to local cylindrical coordinate systems anchored at the centers of each exit... |
Fluent6.1: Scheme function for creating file name based on flow time |
If you are saving information during the calculation in the form of files, such as tiff files for animation, then it is desirable that the file name also contains the iteration, time step or flow... |
POLYDATA - Error message: brozinc not found! |
When calling POLYDATA on a PC, the following error message may appear:<br><br>D:userssupportpolyflow>polydata<br> POLYDATA3 : Using VTK viewer... |
The definition of Jacobian of the surface net mass reaction rate wrt the species concentration in DEFINE_NET_REACTION_RATE macro |
The definition of the jacobian array "jac" which is passed as an argument to the macro DEFINE_NET_REACTION_RATE are not given, The docuemntation states it is the derivative of the... |
UDF to count DPM Hits on a wall |
Client wants to count DPM particle hits on a wall<br>/***********************************************************************<br> UDF for extending post-processing of wall... |
Implementing Buoyancy effect in the K-Omega Turbulence Model using Segregated Solver |
The K omega turbulence model does not include any turbulence generation term due to buoyancy. That term could be important in modeling natural convection with K-Omega.<br><br>A source... |
POLYDATA - trouble with the browser : cannot specify a filename (e.g. for old result or restart file transferred from Unix to PC) |
When reading a previous data file in POLYDATA, it may happen that the browser does not open for some files. This typically happens on PC, for a file previously created on a Unix machine: pathames... |
Porous medium with moving mesh |
A case involving porous medium and sliding mesh doesn't give expected results. The reason being, relative velocities are not used in the porous medium inspite of solving with relative... |
Perturbing boundary nodes in Tgrid. |
By slightly perturbing boundary nodes of a surface mesh in Tgrid, skewness of the resulting volume mesh could be made low. Moving boundary nodes is especially advisable in situations where quads... |
Looping over all the particles in a domain |
There is a loop available for looping over all the particles in a cell. But it does not work if used directly. Actually the array to bin the particles in the cell is not allocated by default. It... |
POLYFLOW - initialisation of the TEMPERATURE field from a CSV file |
Multi-domain non-isothermal flow case or heat conduction calculation: when the TEMPERATURE field is initialised through a CSV file: temperature results do not match the expected distribution. ... |
0: ERROR: Invalid shadow-node id 0; node = 28282, face = 87143, index = 0. |
Above error(node and face numbers in the error are case specific) is encountered in parallel version of Fluent when grid check is performed while there is no problem in serial version.... |
Tips for successfully modeling cavitating flows in rotating equipment |
Cavitation in rotating equipment (e.g. pumps) is an important industrial problem. Fluent 6.1 has a cavitation modes that can be used with rotating reference frames to model cavitation in pumps. ... |
TUI command for dpm summary report in Fluent 6.1.22 |
TUI command for dpm summary report in Fluent 6.1.22?<br>The work around to this problem is to use GUI command, Display-->Particle Tracks, select all the injections under Injections... |
How to check for fluid thread in an interpreted UDF |
As described in Section 6.10 of the Fluent 6.1 UDF Manual (http://www.fluentusers.com/fluent61/doc/ori/html/udf/node122.htm ), the macro FLUID_THREAD_P(thread) can be used as a test to see whether... |
MixSim2: How to start a sliding-mesh (time-dependent) calculation on MRF (pseudo-stationary) results |
The MixSim 2.0 User's Guide, section 11.4.5, gives wrong instructions.<br>Following them, one cannot establish a converging sliding-mesh simulation.<br>Correct instruction must... |