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workarounds for problems with non-conformal interface creation


workarounds for problems with non-conformal interface creation<br>#1. If pairing "interface-A" with "interface-B" fails, try switching<br>their order, i.e....

How to change font size in fluent captions


How to change font size in fluent captions?<br>Type the following command in the cortex window:<br><br>(cxsetvar 'frame/title/font (format #f...

inverting the gray color ramp


How to create a gray image with inverted color ramp?<br>(for example, when submitting an article for journal publication)<br><br>Here is the procedure to invert the...

FLUENT - Adding the case file name in the graphics display window


The graphics window normally displays the description of the type of display e.g. Contours of Velocity Magnitude, pressure etc. In addition, you may want to add the case file name. The manual way...

parallel udfs


simple UDFs can be properly compiled for the parallel solver but the compiled library cannot be successfully linked to the case.<br>No error message appears neither while compiling nor while...

FLUENT 6.1: How to avoid unphysical low/high temperatures near shell conduction zones


For some cases, turning on the planar-conduction model results in unphysical temperatures<br>at cells near several planar conduction zones. At those cells, the temperature hits<br>the...

Minimum channel size


What is the minimum channel size that can be modeled accurately with FLUENT?<br>Following a discussion with experimentalists who also use Fluent we've got a (current) minimum channel...

GAMBIT 2.1.2 : missing library base80.dll when starting


When I invoke GAMBIT 2.1.2 on a PC, I am told that the librasy base80.dll is missing. What can I do ?<br>The easiest consists of adding...

FLUENT 6: How to rename species during the calculation


In some (mostly transient) cases it can be useful to rename one or more species after some time of calculation and then continue with computing. An example is fire and smoke modeling in houses or...

FLUENT 6.1: Easy workaround if session hangs when using porous media with power law model


A FLUENT 6.1.18 session hangs up when power law is used to model the source terms for porous media. This happens when zero directions are specified<br>under Direction-1 and Direction-2...

FLUENT 6.1 - How to report the standard deviation, average, min and max of a quantity on a list of surfaces through TUI commands


FLUENT users want to be able to obtain the reports of standard deviation, average value, minimum and maximum value of a field variable on a list of surfaces, using only TUI commands, in a batch...

Mixsim2: PBT with 90 deg pitch angle: Gambit gives error message: 7303 : inconsistent containment of intersection


In MixSim, a pitched blade turbine impeller object is used, and the blade pitch angle is set to 90 degrees (vertical).<br>(This is basically a radial paddle impeller..)<br>MixSim fails...

Implementing a (parametrized) Gambit journal for a user-defined impeller geometry


There some important things to be considered when you plan to implement a user-defined impeller in MixSim (as a ".mxo" MixSim object file) using a Gambit journal file (section) that...

Non consistent particle track crossing a periodic boundary in the parallel solver


If you solve a case with a periodic boundary by using DPM model in the parallel solver, you may find the discontinuous particle track crossing the periodic boundary. The reason is that the fluid...

Mixism 2.0: Using helical coil: hangs when creating geometry and mesh


A simple configuration with a tank (curved bottom and top), a single, central, vertical top shaft with a simple PBT on it, and a helical coil around it (with plenty of space between the impeller...

Quadratic porous media expression causes divergence.


User tried to apply general quadratic polynomial resistance law like S = -C0 - K*V -C*Rho<br>*Vmag*V. Residuals decrease quite nicely but all of a sudden, it diverges. Double precision...

Initial conditon for filling command in FIDAP


When setting up a single fluid VOF, I specify some cells/elements/continnum to have FILL, CONSTANT=1 using ICNODE command. What do I need to specify for the "EMPTY"...

Interrupting the fluent simulation when field variable exceeds any user-defined limit


Sometimes a particular flow variable (Pressure, velocity, temperature etc) diverges and leaves behind unreasonable results<br>which are of little use. In many such cases, it helps to...

How to plot customized vectors in solid


Client wanted to plot temperature gradient vectors in the solid. He wants to get the values of<br>dT/dx, dT/dy and dT/dx and customized the vectors based on these...

How to change resolutions in Gambit


In some application there are extremely small gaps to be resolved. Since the gap is much smaller than the overall dimension of the geometry, you might see overlapping or misplaying of neihboring...

Cannot launch GT-Power during Fluent-GT coupling


Error appears when coupling Fluent with GT-Power. The error message can be like this:<br><br>Unable to get IOR from server...

Transient Ensight export creates huge .geo file: How to reduce its size?


While exporting data in the transient ensight format during a transient FLUENT simulation with static (i.e. unchanging) geometry, the ensight .geo file<br>becomes too large. This is because...

Specify both spatial and temporal temperature profile on a wall zone


In some heat transfer simulations, user will want to impose a temperature profile on a given wall zone that is<br>varying both spatially and temporally. That is, at different times, the...

macro to access y+


When writing a UDF, you might want to access y+ value. A macro would be helpful.<br>Search terms: ystar yplus<br> F_STORAGE_R(f,tf,SV_WALL_YPLUS_UTAU) will return...

Creating particle track animations using the DPM model


How to create particle track animations with Fluents DPM model?<br>Generate a series of TIFF files using the following procedure. The TIFF files can then be combined into an animation...