KR363: Is there any chart showing compatibility of a given model with other models in the same simulation using ANSYS FLUENT? |
The following chapters discusses the different models in details:<br><br> * Multiphase Models (see Chapter 26)<br><br> * Moving Domain Models (See Chapter ... |
KR364: How can I make my background white in FLUENT 12 so that I can take screen captures for my presentation? |
For the workbench color-scheme the background color is always blue with gradient color and you don¿t have options to change this background color.<br><br>1. Within default WB... |
KR365: CFD Post : Post processing of cases which has MRF/Sliding Mesh/Dynamic Mesh. |
There are problems with Post processing of cases which has MRF/Sliding Mesh/Dynamic Mesh .This is a documented defect. A workaround is available that requires an environment variable... |
KR366: If I want to create two keypoints at (1.5, 7.8, 12.3) and (15.6, -45.6, 42.5) using the array parameter EXAMPLE in question 3, how can I do it? I am able to create them one-by-one for each element of the array but that becomes tedious when I have a lot of rows in the table. |
For automatic keypoint numbering you could use:<br>num=2 ! set this to be the number of rows of data in EXAMPLE<br>csys,0 ! or whatever coordinate system you want to... |
KR367: I am working in the global cylindrical coordinate system (CYS=1). I am able to create the geometry in this coordinate system. I'd like to apply a displacement constraint on an area in the theta direction. I tried setting UY=0 for this area but this seems to take effect in the global cartesian coordinate system (from looking at the symbols that appear in the graphics window). How do I apply a displacement constraint in the theta direction in the cylindrical coordinate system? |
Constraints are applied to the nodes, which are in the nodal coordinate system. The nodal coordinate system is ALWAYS Global Cartesian. What you<br>will need to do it to 'rotate the... |
KR368: I'd like to plot the von Mises stress for selected areas in a 3D model. I select the nodes attached to these areas using select logic. However, then I do a contour plot of the nodal solution (PLNSOL), it seems to plot the stress for all the areas, not just the selected surfaces. How do I plot stresses only for the selected areas? |
Yes that is the way it is supposed to work. To get closer to what you want, you should select the area, select the nodes attached to that area,<br>then select the elements attached to those... |
KR369: I have a list of x,y,z coordinates in a text file. How can I read these into ANSYS to create keypoints? |
This can be done using the Ansys APDL functions. Look in the APDL manual for a complete description. Here is a brief excerpt from section 3.11.5.4 which shows how to read data into an array... |
KR370: How can I adjust the turbulent Prandtl number for enthalpy in CFX ? |
Turbulent Prandtl Number for Enthalpy:<br><br>The turbulent Prandtl number for enthalpy transport can be controlled by means of the TURBULENT FLUX CLOSURE singleton located under HEAT... |
KR371: How can I adjust the turbulent Schmidt and Prandtl number for species in CFX ? |
In order to allow for independent turbulent Prandtl and component turbulent Schmidt numbers, the following needs to be added at the top of the CCL:<br>RULES:<br> OBJECT:... |
KR372: Best Practices for Combustion Calculations with Detailed Chemical Kinetics in FLUENT 6.3 |
Please refer the attached document |
KR373: Why am I getting divergence on the first iteration for an axisymmetric problem? |
I am running a 2d axisymmetric simulation but it diverges on the first iteration with the following message:<br><br>Divergence detected in AMG solver: x-momentum -> Increasing... |
KR374: What are the requirements for an axisymmetric analysis? |
Axisymmetric indicates that the domain is axisymmetric about the x axis. When Axisymmetric is enabled, the 2D axisymmetric form of the governing equations is solved instead of the 2D Cartesian... |
KR378: How do I set up pure O2 combustion with RIF in ANSYS CFX 12? |
There is bug in RIF which resets the oxidizer concentration to the default setting of 0.233 if 1.0 is entered as the O2 oxidizer concentration<br><br>The workaround for now is to set... |
KR379: Can you give me some basic guidance on modeling droplet evaporation in FLUENT 12? |
Many users setup a droplet evaporation case in FLUENT and use default settings for material properties for the droplet. This is not correct as those are just placeholders. It is important to note... |
KR380: Which ANSYS mesh generation tools, if any, can generate meshes in parallel (i.e. using multiple processors)? |
CFX-Mesh is the only mesher in R12.x that generates meshes in parallel. Staring with R13 the Meshing application will support parallel meshing for selective algorithms and this will be extended to... |
KR382: What are the new or updated Text-User-Interface (TUI) commands in FLUENT 12? |
In FLUENT 12, some of the TUI commands have been modified and quite a few new ones have been added. Attached please find a document that lists changed or new TUI commands in FLUENT 12 as compared... |
KR383: My UDF compiles in Linux, but I cannot compile it in Windows. Why? |
This behavior is mostly due to the fact the Visual C++ compiler is stricter with non-standard C features than the gcc compiler used in Linux. In particular, the most commonly (mis)-used extension... |
KR384: How to calculate the gradient of a boundary only variable (eg wall shear stress) in CFX 12? |
This KR applies to both pre defined boundary variables such as wall shear stress or user defined boundary only variables (AVs created with the boundary only field option selected). The method is... |
KR385: Best Practices for Modeling Thin Liquid Film Coating Flows in FLUENT |
Please see the attached document |
KR386: Can we add design points to the automatic design points and improving the quality of Response surface ( COEFFICIENT OF GOODNESS OF FIT) at 12.0? |
If the response surface type is switched to ¿Kriging¿, then the user can have access to refinement capabilities (manual, interactive or automated). Kriging has the ability to... |
KR387: What is the status of using Design Exploration to drive 3rd party codes? In v11.0 this was done by linking to a XML process instruction file. How is it done in ANSYS 12? |
It is a beta feature in 12.0 and will be available in 12.1 |
KR388: Does the FE modeler passes the same mesh received from an upstream system to a downstream system? |
Yes, FE modeler passes the same mesh received from an upstream system to a downstream system, and then the user in the downstream system have the choice of using this mesh or generate another one. |
KR389: When the Parasolid is created do we need to remesh it in a certain analysis system or the mesh stays as it was imported to FEmodeler? |
If you link FEM system to the<br><br> a -"geometry" cell of another downstream system, FEM transfers the parasolid geometry, in this case the mesh is not... |
KR390: How to combine thermal results using mechanical apdl? |
See simple input file:<br>/PREP7<br>BLC4,0,0,10,5<br>ET,1,PLANE55<br>MP,KXX,1,60<br>amesh,all<br>FINISH<br><br>/SOL DL,1, ,TEMP,100,0<br>DL,3,... |
KR391: What are different types of response surfaces available in ANSYS 12.0? |
General rules:<br><br>¿Standard 2nd order polynomial are efficient when the variation of the output is smooth wrt the input parameters<br><br>¿Kriging proves... |