ANSYS Meshing Basics
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Transcript of ANSYS Meshing Basics
ANSYS MESHING BASICS: (TUTORIAL)Created & Presented by: Syed Hasib Akhter Faruqui (Nehal)
Meshing •It‘s the most important step of the whole. For this we have tomaintain certain parameter's
Meshing Methods •Hybrid Mesh: Tet,Prism,Pyramid•Hexa Dominent,Sweep Meshing•CutCell Meshing
Global Meshing Setting •Mesh Refinement•Global Inflation•Global Mesh size
Local Mesh Settings •Sizing•Body/Sphere of Influence•Match Control
Steps to Meshing:
Steps to Meshing:Meshing Process to be followed in ANSYS Meshing
Selection of Meshing Method & Physics (Static,Modal,CFD,Structural)
Specify Global Meshing System (Sizing,Pinch, Refinement, Inflation)
Local Mesh Setting (Sizing,Pinch, Refinement, Inflation)
Mesh GenerationMesh Quality Check
If settings neededTo be changed
SELECTION OF MESHING METHOD & PHYSICS (STATIC,MODAL,CFD,STRUCTURAL) Meshing Method: Automatic (Patch Conforming/Sweeping-These are Quad Dominant but if
needed Triangular mesh are formed too) Tetrahedron (Patch Independent) Tetrahedrons (Patch Conforming) Physics Preferance: Computational Fluid Dynamics (CFD) Explicit Mechanical Electromagnetic)
MESHING METHOD:For 3D Geometry: Automatic
– Combines multiple methods based on complexity of the geometry– Patch conforming / Sweep Mesh
Sweep– Generates prisms
CutCell mesh –Cartesian CutCell mesh
Tetrahedrons– Patch Conforming (T Grid based)– Patch Independent (ICEM CFD based)
for 2D geometries: Automatic Method (Dominant) Triangles Uniform Quad/Tri Uniform Quad
MESHING METHOD:
SPECIFY GLOBAL MESHING SYSTEM Defaults : Set Physics and Solver preferences Sizing : Specify sizing function (curvature, proximity,fixed), mesh sizes,
growth rate, etc. Inflation : Prism layer growth CutCell Meshing: CutCell meshing activation Advanced : Advanced mesh parameters Defeaturing : Ignore small features in geometry for improving mesh
quality
Statistics : View mesh count and mesh quality
LOCAL MESH SETTING
Virtual Tropology Connections Section Planes Mesh Numbering Named Selection (for Boundry Condition)
OTHER SETTING’S
Errors in Result depend on correct orientation and setting of Mesh. A good Quality Mesh causes less error in result.
We can consider these three components of a good mesh1. Good Mesh quality ( Skewness, orthogonality etc)2. Proper Mesh Distribution3. Perfect Resolution
MESH QUALITY CHECK
Tools of the Trade:1. Mesh Statistics & Metrics2. Mesh Metric Graph3. Mesh Metrics Control
MESH QUALITY CHECK
Mesh Metric's quality check:1. Orthogonal Quality: Minimal Check value 0.2
2. Skewness Quality: Maximum Check Value 0.8
N.B.: A MESH WITH GOOD QUALITY METRICS DOESN’T MEAN NECESSARILY A GOOD MESH. HOWEVER IT IS VERY IMPORTANT TO GENERATE A MESH DISPLAYING GOOD QUALITY METRICS AS A NECESSARY CONDITION
MESH QUALITY CHECK
MESH QUALITY CHECK
* Information's on this page was distributed by ANSYS Fluent Training Sessions and it’s a sole property of ANSYS Inc. The author of this Presentation didn’t prepared it but rather using it as a reference.
*
TUTORIALS ON THE TOPIC
Global Meshing
Local Meshing
OtherMeshing Methods
Our Tutorials on Meshing Section will be divided in the following Sections:
THANK YOU ALL For any info and details or related files please leave comment on the video
section or mail me at “[email protected]”