ANSYS Meshing Basics

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Transcript of ANSYS Meshing Basics

ANSYS Meshing Basics: (Tutorial)

ANSYS Meshing Basics: (Tutorial)Created & Presented by: Syed Hasib Akhter Faruqui (Nehal)

Steps to Meshing:

Steps to Meshing:

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)ExplicitMechanicalElectromagnetic)

Meshing Method:For 3D Geometry: Automatic Combines multiple methods based on complexity of the geometry Patch conforming / Sweep MeshSweep Generates prisms CutCell mesh Cartesian CutCell meshTetrahedrons Patch Conforming (T Grid based) Patch Independent (ICEM CFD based)

for 2D geometries:Automatic Method (Dominant) Triangles Uniform Quad/TriUniform QuadMeshing 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 activationAdvanced : Advanced mesh parameters Defeaturing : Ignore small features in geometry for improving mesh quality

Statistics : View mesh count and mesh quality

Local Mesh Setting

Virtual TropologyConnectionsSection PlanesMesh NumberingNamed Selection (for Boundry Condition)Other Settings

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 meshGood Mesh quality ( Skewness, orthogonality etc)Proper Mesh DistributionPerfect ResolutionMesh Quality Check

Tools of the Trade:Mesh Statistics & MetricsMesh Metric GraphMesh Metrics Control

Mesh Quality Check

Mesh Metric's quality check:Orthogonal Quality: Minimal Check value 0.2

Skewness Quality: Maximum Check Value 0.8

N.B.: A MESH WITH GOOD QUALITY METRICS DOESNT 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 its a sole property of ANSYS Inc. The author of this Presentation didnt prepared it but rather using it as a reference.*

Tutorials on the topicOur Tutorials on Meshing Section will be divided in the following Sections:

Thank You AllFor any info and details or related files please leave comment on the video section or mail me at shafnehal@gmail.com