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.

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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 “shafnehal@gmail.com”