KR68: I just ran a simple FLUENT run in Workbench. How can I view the files I created and what are they? |
Please check the image |
KR69: What does Duplicate mean in Workbench? |
New Fluid Flow (FLUENT) system is created<br><br>Geometry and Mesh cells (and their data) are shared*<br><br>Setup cell B4 is Up-To-Date (since it contains a copy of the... |
KR70: In my geometry I have both fluid and solid domains. I am interested in fluid analysis. How can I delete/deactivate/suppress the solid domain so as not to mesh it? |
Expand the Geometry branch under Model in Outline<br><br>Right-click on Solid and select Suppress Body |
KR71: How is a real variable defined in a UDF treated in a double precision solver? |
If you define your variables as real, they will be in double precision if you use the double precision solver.<br><br>However, if you use float or double to define your variable type,... |
KR72: My FLUENT User Defined Function (UDF) won't interpret or compile - what is wrong? |
The answer depends upon what exactly has happened.<br><br>If FLUENT complains about not being able to find a compiler, then check to make sure that the compiler is properly... |
KR73: How can I define boundary zones for FLUENT? |
Create inlet boundary zone<br><br>Left-click on the yz plane at -x to select it<br><br>Right-click and select ¿Create Named Selection¿ from context menu<br><br>Name the selection, ¿velocity... |
KR74: What's the difference between 'Update the mesh' vs. 'Generate Mesh' |
The Update command generates the mesh, exports a mesh in the FLUENT format, and brings the Mesh cell Up-to-Date. The Generate Mesh command only generates the mesh and does not export the mesh in... |
KR75: How to make the NS created in DM show up in Mesh? |
The procedure is as follows:<br><br>a. Display the Property table for the Geometry Cell in WB12.<br><br>b. Enable the Named Selections<br><br>c. ... |
KR76: How does one set appropriate Zone Type (e.g. mass flow inlet, pressure outlet, symmetry etc.) for the FLUENT simulation on WB12? |
There is no GUI to set the Zone Type in DM and Mesh. FLUENT on WB12 decides the Zone Types based on name string used for the Named Selections... |
KR77: Why does the FLUENT zone look different from the NS? |
One of the reasons may be that the user has selected the surface as a part of multiple Named Selections. NS is not a true substitute for boundary zone type in GAMBIT. GAMBIT does not allow a... |
KR78: How to create periodic mesh in the Mesh module? |
Linking face mesh to create periodic mesh (like in GAMBIT) is not available in Mesh module. However, using the ¿Match Control¿, one can match the mesh for two faces to have suitable... |
KR79: Can I use ICEM for mesh generation for the FLUENT simulation in WB12? |
It¿s not possible using the FLUENT system in WB12. You can use ICEM in standalone mode and also use FLUENT in WB12 or standalone. |
KR80: Procedure for rotational periodic boundary: |
Match Control links only two faces of the same part (also applicable to a multi-body part). Match control is not a true substitute for mesh-linking feature in GAMBIT. If the geometry is created... |
KR81: What UDF function is used to retrieve a list of all injections specified in discrete phase model (DPM)? |
The following sample code shows the function and its general usage in a UDF macro.<br><br>#include... |
KR82: Can I mesh only few parts in Mesh module and then use TGrid to generate mesh for others? |
It¿s not possible using the FLUENT system in WB12. However, it¿s possible in two steps.<br><br>a. Create a Mesh Component System in WB12; Generate surface/volume... |
KR83: List of some commonly used features of GAMBIT, missing in WB12 |
Checking mesh quality<br><br>· Mesh controls (e.g. smoothing, node movement etc.)<br><br>· Meshed sizing function<br><br>· ... |
KR84: What are the known limitations of CFD-Post for FLUENT users? |
Limitations with ANSYS FLUENT Files<br><br>* Custom-field functions don¿t get transferred<br><br>* FLUENT views cannot be used with CFD-Post<br><br>*... |
KR85: How to calculate volume of particles in each cell and store in user defined memory (UDM)? |
The following sample code shows how to calculate volume of particles in each cell and store result in user defined memory.<br><br>#include "udf.h¿<br><br>/*... |
KR92: When do I set parameters in View Factors? And what are these blocking/nonblocking adaptive/hemicube, smoothing settings? |
You visit the view factor parameter panel if you want to add more faces per surface cluster, change the view factor calculation method or smooth the view factor values. Blocking/Nonblocking... |
KR93: What does DO/Energy Coupling mean? |
For applications involving optical thicknesses greater than 10, you can enable the DO/Energy Coupling option in the Radiation Model in order to couple the energy and intensity equations at each... |
KR94: What are the 'flow iterations per radiation iteration'? |
They refer to the number of Flow Iterations per Radiation Iteration.<br><br>If the RTE has a slower rate of convergence the number of Flow Iterations per Radiation Iteration should be... |
KR95: What is Angular Discretization? Should I change it? |
It defines the number of control angles that are used to discretize each octant of the angular space. By default, the number of Theta Divisions and the number of Phi Divisions are both set to 2.... |
KR96: Where do I enter radiation properties such as emissivity/absorptivity etc.? Are there any recommended values for certain surfaces? Where do I find them? |
The emissivity is the most representative radiative property and it has to be entered in the boundary condition panel for heat transfer. At inlets and outlets the default emissivity/absorptivity... |
KR97: What is the meaning of various terms for pressure like: static, dynamic, total, operating, absolute, gauge, etc. in the context of fluid dynamics? |
Static pressure is the pressure at any point in the fluid. This pressure is a function of the state of the fluid, which for an ideal gas, is related to the density/volume of the fluid through the... |
KR98: How big should I make the domain for an automotive external aerodynamics calculation? |
To replicate a wind tunnel test, you are obviously limited to the physical size of the wind tunnel lateral to the car. It is suggested to have at least two body-lengths upstream of the car for... |