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KR333: Is meshing included with the solver or DM?

No, it is not included with the solver or DM. The meshing process is done in a different tool called AMP (ANSYS Meshing Platform) inside Workbench.

KR334: How can I create conformal mesh in solid bodies?

To create a conformal mesh between the solids/volumes, you need to form a new part of those solids/volumes in Design Modeler.

KR335: 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.<br><br>NS is not a true substitute for boundary zone type in GAMBIT. GAMBIT...

KR336: Procedure for rotational periodic boundary in Ansys meshing:

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...

KR337: 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 mesh and...

KR338: How to define NSs in complex geometries having many interior faces?

The classic way is to use in DM or AMP the planes from the bottom left corner of the graphics window and accept/reject the boundary faces one by one (See attached image file for more...

KR339: AUTODYN: ""Problem terminated .... time step too small""
Can you tell me what the problem is? What should I do with the time step to avoid this problem? Or is it something else?

"Time step too small" appears when current time step is less than 10 % of the initial time step. Error message can be avoided by decreasing the minimum time step to continue the...

KR340: My MSUP (Mode Superposition) harmonic response analysis gives different results than my full harmonic response analysis. Why?

The most likely problem is due to using an insufficient number of modes being used for the MSUP harmonic response analysis. Please see the attached example which compares displacement results for...

KR341: How to obtain Contact Forces in ANSYS Mechanical APDL?

You should not use PLESOL and PRESOL command to obtain contact forces for contact elements. The force values reported by these commands may not be accurate for these elements. Instead, use the...

KR342: I'm using the Monte Carlo radiation model in ANSYS-CFX. The run crashes at the first radiation call with the following message. How do we fix this?
ERROR #666000005 has occurred in subroutine WALK.
Too many iterations while using Monte Carlo.
This may possible be due to:
1 - Highly reflective walls
2 - Small absorption coefficient
3 - Symmetry planes are too close, i.e. 2D geometry
4 - Geometry specification error

For Highly Specular Boundaries (Diffuse Fraction = 0) and for 2D geometries with a nearly transparent media (absorption coefficient close to 0) , the radiation solver stops when there are infinite...

KR343: How do I see NOX values in CFX-Post in units of ppm on a DRY BASIS?

Create the below Expression for NOX ppm(dry) and assign it to variable:<br><br><br>NOX ( PPM dry) = NO.Mole Fraction* 10^6 /(1 - H2O. Mole Fraction)

KR344: Are there any recommended values for the Anisotropy Coefficient for the Scattering Model in coal combustion?

Although the literature suggests that there is a large amount of scattering from coal and ash particles, most of this scattering is in fact close to the forward direction (i.e. it is very...

KR345: What is the default value of the "Linear Anisotropy Coefficient" in the P1 Radiation model formulation? Can it be changed by the user? CFX-Pre does not allow it.

The default value is 0. It can be changed via CCL.<br><br><br>THERMAL RADIATION MODEL:<br>Option = P1<br>SCATTERING MODEL:<br>Option = Linear Anisotropy<br>Anisotropy =...

KR346: How to set a reaction rate affected by a catalyst in CFX-Pre?

Before formulating the affect of a catalyst on a reaction rate, it is imperative to look into the way in which a catalyst affects a reaction.<br><br>A catalyst is a substance which...

KR347: How do we post-process forward and backward rates of a reversible reaction in CFX.

A reversible Reaction can be set in CFX via two methods:<br><br>(a) Explicitly giving the forward and backward Rate<br>(b) Equilibrium Option<br><br>The...

KR348: Mixture Fraction and Mixture Fraction Variance variables are an important part of Flamelet and Partially Premixed Combustion Models. Species are stored in the Library as a function of Mixture Fraction.
Why cannot I see these variables in CFX-Pre under FLUID MODELS? Can a user set an arbitrary diffusivity for these variables?

The mixture fraction and mixture fraction variance equations DO NOT appear under FLUID MODELS in CFX-Pre but they are solved as NORMAL TRANSPORT EQUATIONS and so require boundary conditions to be...

KR349: Species in the Flamlet library are also function of Scalar Dissipation Rate. What is the diffusivity value used in the expression for the Scalar Dissipation? Can the user change it?

In the strain rate (i.e. scalar dissipation rate) calculation, the diffusivity is laminar + turbulent so that the laminar part is negligible.

KR352: I am looking for FLUENT POLYFLOW FIDAP GAMBIT <b>solutions</b> that were available on the Online Technical Support Portal (OTS). Where can I find them?

OTS is no longer available and has been replaced with a new CRM system. All relevant solutions that existed in OTS have been migrated into the new CRM and are available to all our Customers, along...

KR356: Getting Started With Workbench 12.0

The attached document contains a brief description of the new Workbench 12 user interface intended to introduce existing Workbench Simulation users to the environment.

KR357: Engineering Data in Workbench 12.0

The Engineering Data application provides overall control for material properties.<br>¿ Engineering data is a part of every project.<br>¿ Engineering data can be opened...

KR358: Are there any Best Practices for Setting Turbulence Parameters at Flow Inlets for RANS Calculations in FLUENT 12?

Please see the attached document

KR359: Where can I learn more about contact settings and convergence in Mechanical 12.0?

The attached document provides details of the enhancements that have been implemented for contact in release 12.0 of Mechanical . In addition, if contact model converged at R11.0 and failed at...

KR360: If I build a project using a CAD model and solve it completely, can I later replace the CAD model with another one that has the same Named Selections and simply update it without redoing any of the meshing or setup?

This can be done if:<br>¿ Named Selections are defined in CAD system.<br>o There are ways around this restriction, depending on the model, but this is generally the best...

KR361: How can I export a Deformed Geometry From Mechanical to an External CAD File through FE Modeler?

Please refer the attached document

KR362: How can I resolve the following error message 'WorkBench Error: Could not register files of type:Udflib' or 'Failed in handling Fluent message'?

If you have a UDF with your Fluent simulation, and your Fluent is within WB. The UDF has to be put under FFF/MECH directory, where the .msh file is saved, rather than FFF/Fluent directory....