All walls should have adjacent zone as fluid and their shadow zone as solid, for a model containing many solid and fluid zones. |
When a mesh file for a model having many solid and fluid zones is read in Fluent, it creates wall and<br>wall-shadow boundary zones. Some of these walls will have adjacent zone as fluid and... |
Icepak FAQ: How to determine System pressure drop from Simulation results |
Icepak reports static pressure values. The sytem pressure drop is actually the difference in total pressures.<br>If you have a fan using fan curve, it is very simple. YOu just need to... |
Reading a Case (and/data) file in parallel is very slow |
You can read a case file in serial mode quickly but when you try to read in a case file in parallel it takes an unacceptable amount of time.<br>Comments: You can read a case file in serial... |
Compiling Interpreted UDF's (WINDOWS) |
For detailed instructions please see the documents at the link below.<br>For compiling Interpreted UDF's while running Fluent in Serial see this document:<br><br><a... |
Unphysical temperature in solid zone |
Client was getting very low temperatures, limited by lower limit in the solid zone in the domain. Some cells in the fluid adjacent to the solid were also getting these low... |
Using C_T_M1 in the UDf to access previous time step temperatures |
Problem for resolution1:<br>Proper use of C_T_M1 macro in the UDF to access previous time step temperature values.<br><br>Problem for resolution 2:<br>A case file that has... |
On multi-component species diffusion in Fluent |
How does multi-component species diffusion work in Fluent? Can we specify binary diffusivities of various species in the mixture using UDF and use full multi-component diffusion?<br>Here is... |
How to change discretization schemes using TUI? |
How to change discretization schemes using TUI?<br><br>Use the following text commands as appropriate followed by the appropriate number from the list... |
How to kill a hung fluent job and make it write out case/data files? |
<br>A running fluent job can be killed by using check-pointing as described in sections 2.6 and 30.7.2<br>of the Fluent6.1 manual.<br><br>However this will not work if the... |
Mixture multiphase model: resolving convergence |
Two-phase flow through a curved channel was modeled using multiphase mixture model. Tet/hybrid cells were used with relatively low skewness. However, this model could not be converged. ... |
Mixsim: Custom impeller by importing ACIS CAD file -- meaning of parameters |
I'm using the "Custom by ACIS file" impeller object in order to define an impeller from an existing ACIS (.sat) file.<br>- What does the parameter "Nom. Diam. (in... |
MixSim2: How can I implement an impeller as a new object? |
I want to implement a new impeller object in MixSim.<br>I have an ACIS file that can be used in the "Custom by ACIS file" impeller object, by I want<br>- to have a... |
Killing A Fluent Session - WINDOWS |
Killing a Fluent session when Fluent stops responding<br><br><br>1. Go to the Task Manager, CTRL-ALT-DEL<br>2. In the Applications window highlight the Fluent... |
Convergence tip for vaporizng droplet DPM |
If cold droplets, represented by DPM, are injected into very hot mixture and interaction with continuous phase is enabled, temperatures may get out of reasonable range often resuting in... |
FLUENT 6 - Converting .geo file from CFX4.x to .cas file using fe2ram tfilter |
The following error is reported while converting a .geo file written from CFX 4.x to .cas file using tfilter fe2ram:<br><br>CFX file to RAMPANT file<br><br>Read 0 nodes, 0... |
time step choice for transient heat conduction problem of solid in convective flowfield |
Lumped body in convective flowfield<br>Heat generation of lumpted body<br>Estimate the proper choice for dt for unsteady simulation<br>From a 0-D... |
UDF to automatically change timestep size |
<br>There might be a need to change timestep size based on number of iterations taken for a case to converge within each time-step. This could be accomplished through an UDF which is... |
Fighting Heat conduction convergence with multiple metal type |
Conductive heat transfer containing two or more different metals (Aluminum and Steel) with tetrahedral cells (equangle skewness less than 0.7) caused severe convergence problem . I could not get... |
After installation of MixSim 2.0, GAMBIT (or FLUENT) cannot be started any more |
MixSim 2.0 was installed in the same Fluent.Inc area which already contained GAMBIT 2.x (or FLUENT 6.x). GAMBIT (or FLUENT) cannot be started any more, or shows unexpected... |
Multiple monitors in same window |
Presently, it is not possible to display multiple surface monitors in the same graphical window as seen in residual plotting.<br>Following is the workaround for accomplishing above... |
Conjugate Heat Transfer showing temperature limitation messages: |
With conjugate heat transfer problem, the temperature often hits the upper and/or lower limits.<br>For such cases, disabling the secondary temperature gradient calculation resolves the... |
Best practices for using segregated solver with compressible flow |
In the AER team's experience, the following works well for compressible flows when using the segregated solver:<br><br><br>1) Initialize the flow to be near stagnation... |
MixSim: How to use "Profile Baffles" in MixSim2 |
In the MixSim User's Guide, there is no information about the structure of ".mxo" (MixSim Object) files for adding profile baffles (and other user-specified)... |
Scalar interpolation |
This UDF replaces Solution 586, which was found to have problems in parallel.<br><br>Interpolate p, u, v, and w to point data specified in input file. File format is as... |
Removing left-handed faces |
While creating non-conformal interfaces, user came across left-handed faces upon grid check. Usign the TUI option grid-modify zones-repair face-handedness did not remove the left handed... |