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KR503: TGrid: How do I exactly capture the particular important feature edge ?


Use a relatively smaller Feature Angle to extract Feature edges of important geometrical features and use a relatively larger angle for geometrical features having less importance.

KR504: TGrid: What is difference between fixed angle and adaptive angle for the feature extraction?


Fixed angle criterion -<br>This method considers the feature angle between adjacent faces when creating edge loops. You can specify the minimum feature angle between adjacent faces as a...

KR505: TGrid: What is the significance of buffer layers in Wrapper?


Buffer Layers specifies the number of additional layers to be added in order to have a smooth transition from fine to coarse cells. As buffer layers number increases the transition is...

KR506: TGrid: What are the advantages of using wrapper?


The advantages of the wrapper mesh are:<br>¿ Automated handling of gaps and overlaps<br>¿ Size control<br>¿ Feature suppression<br>¿ Better...

KR507: How does Hexcore meshing work?


Hexcore is a hybrid meshing scheme that generates tet cells adjacent to boundaries and a Cartesian mesh in the core flow regions.<br>Hexcore mesh combines automation and flexibility of...

KR508: TGrid: What if I go for Hexcore and my boundary mesh has both tri and quad elements?


Quad faces are not allowed while initializing Hexcore mesh. Split any quad faces in the boundary mesh into triangular faces using triangulate command

KR509: What is the difference between ""Keep outer domain"" &
"" Grow upto boundaries"" in Hexcore meshing?


Keep Outer Domain option should be used when none of the boundaries of object is touching the far-field boundaries.<br>Grow Upto Boundaries option should be used if the body is touching at...

KR510: TGrid: What is the difference between buffer layer and peel layer? What are the optimal values for them?


Buffer Layers specifies the number of additional layers to be added in order to have a smooth transition from fine to coarse cells. As buffer layers number increases the transition is...

KR511: How I can refine the Hexcore mesh in particular region?


Hexcore mesh in a particular region can be refined using Local Regions option available in the Hexcore panel. A region with fine mesh size can be defined around a particular...

KR512: TGrid: How to grow prisms on adjacent zones with different setting?


We can use Zone Specific Growth option present in Prism Panel. Select the boundary zone, set the necessary offset and growth method in Growth tab. Enter number of layers and First Height in the...

KR513: What is meant by dangling face zone? How to generate prisms on it?


Dangling face zones are two sided walls which are present in some of the geometries.<br>To create prisms on such zones, select the dangling face zone and enable Grow on Two Sided Wall option.

KR514: I get the following memory allocation error when I try to run the simulation.

Error: 1000000: Failed to allocate 30.77MB memory (../../src/amg.c:4587)
Error Object: #f


You get this error when you do not have sufficient memory to run the case.<br>Find out the cell count (Mesh->Info->Size). 1Million case needs 1GB RAM in single precision solver...

KR515: I get the following error when I changed my multiphase model from VOF to Eulerian in my case setup.
Error:Cell_Function_Values: unrecognized function: velocity magnitude.


This error message is due to the solution monitor (Velocity magnitude of mixture), which no longer have access to mixture velocity when you use Eulerian Model. When you use VOF model, velocity is...

KR516: How to make sure that mesh is of good quality for FLUENT simulation?


For a good quality mesh, skweness, aspect ratio, and the size change value should be under limit. Aspect ratio and the skewness represent the quality of a single cell, where as the size change...

KR517: What are the plans for Microsoft Windows 7?


Please visit the following link:<br><br><a target=_blank...

KR518: The R12 documentation (Section 10.3.2) states 'The LES turbulence model cannot be used with the mixing plane model'. However, in Appendix A. (fluent model compatibility table) it shows that LES is compatible with mixing plane. Please clarify.


Compatibility chart corrected such that "n" appears for LES + mixing plane. The Fix is in R13 and 12.1 errata<br><br>Clarification: In general LES is not compatible with...

KR519: How do I enter hydrostatic head in ANSYS FLUENT?


When gravitational acceleration is activated in the Operating Conditions dialog box (accessed from the Boundary Conditions task page), the pressure field (including all pressure inputs) will...

KR520: Can I use a custom logo in CFD-POST?


In the outline tree, under title page, you can activate the custom logo and deactivate the ANSYS one.

KR521: How to setup the mass flow rate of DPM point injection in 2D and in 2D Axisymmetic in ANSYS FLUENT?


The manual explains the difference between 2D axisymmetric and 2D non-axisymmetric.<br><br>2D non-axi-symmetric: the model will consider that your injection (which will have the form...

KR522: How to setup a rotating flow when the mass flow inlet boundary condition is used in ANSYS FLUENT?


Below are the 2 steps needed to set-up a mass flow-inlet with a 30 degrees rotation (or swirl).<br><br>FIRST STEP: Define the axial direction<br><br>Before setting the...

KR523: How do I set the ISAT parameters in FLUENT?


The numerical error in the ISAT table is controlled by the ISAT Error Tolerance, which has a default value of 0.001. This value is relatively large, which allows faster convergence times. However,...

KR527: Best Practices for Large Eddy Simulations (LES) in ANSYS FLUENT


See attached PDF file

When should I use a free opening, and when should I use a re-circulation opening?


Free opening should be used in places where the fluid can enter the domain without any pressure drop.<br><br>Recirculation openings model devices that extract fluid from the cabinet at...

What is the difference between a free opening and a grille?


Free opening is a two-dimensional object representing areas of the model through which fluid can flow. Opening does not offer any resistance to the flow.<br><br>A grille is an opening...

What happens if an opening is placed on the surface of or inside a solid object such as block or plate?


When an opening is placed on the surface or inside of the solid block or plate, opening will cut through the block/plate and will create fluid region instead of solid region for...