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1 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential 16.0 Release Lecture 3: Introduction to ANSYS Meshing Introduction to ANSYS Meshing

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Page 1: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

1 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

16.0 Release

Lecture 3:

Introduction to ANSYS Meshing

Introduction to ANSYS Meshing

Page 2: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

2 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Introduction to ANSYS Meshing

In this lecture we will learn:

• Process for pre-processing using ANSYS tools

• What is the ANSYS Meshing?

• Meshing Fundamentals

• How to launch ANSYS Meshing?

• ANSYS Meshing interface

• Geometry concepts

• Meshing methods

Page 3: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

3 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Preprocessing Workflow

Sketches and Planes

Geometry Import Options

3D Operations

Bi-Directional

CAD/ Neutral

Geometry Cleanup and Repair

Automatic

Cleanup

Simplification,

Mid-surface,

Fluid Extraction

Extrude, Revolve,

Sweep, etc

3D Operations

Booleans,

Decompose, etc.

Import/ Geometry Creation

Geometry Modifications

Meshing Solver

Meshing Methods

Hybrid Mesh: Tet,

Prisms, Pyramids

Hexa Dominant,

Sweep meshing

Global Mesh Settings

Local Mesh Settings

Sizing, Controls,

etc.

Assembly

Meshing

Page 4: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

4 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

What is ANSYS Meshing

ANSYS Meshing is a component of ANSYS Workbench

• Meshing platform

• Combines and builds on strengths of preprocessing offerings from ANSYS:

– ICEM CFD, TGRID (Fluent Meshing), CFX-Mesh, Gambit

Able to adapt and create Meshes for different Physics and Solvers

• CFD: Fluent, CFX and POLYFLOW

• Mechanical: Explicit dynamics, Implicit

• Electromagnetic

Integrates directly with other WB systems

Page 5: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

5 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Meshing Fundamentals

Purpose of the Mesh

• Equations are solved at cell/nodal locations

– Domain is required to be divided into discrete cells (meshed)

Mesh Requirements

• Efficiency & Accuracy

– Refine (smaller cells) for high solution gradients and fine geometric detail.

– Coarse mesh (larger cells) elsewhere.

• Quality

– Solution accuracy & stability deteriorates as mesh cells deviate from ideal shape

Page 6: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

6 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Meshing Process in Ansys Meshing

• Physics, Sizing, Inflation, Pinch, …

• Sizing, Refine, Pinch, Inflation, …

• Preview surface mesh, Inflation

• Mesh metrics, Charts

Page 7: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

7 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Launching ANSYS Meshing

• ANSYS Meshing is launched within Workbench

– 2 ways :

Fluid Flow (Fluent), Fluid Flow (CFX),

From Analysis Systems

Mesh

From Component Systems

Double click Mesh in the

System

or right click and select Edit

Page 8: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

8 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Graphics User Interface

Mesh Metrics

Graphics window

Section Planes

Manage views

Details view

Outline

Toolbars

Units Bar Entity Details Bar

Message window

Worksheet

Page 9: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

9 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Outline

Three default sections

• Geometry

– Bodies

• Coordinate Systems

– Default global & user defined systems

• Mesh

– Meshing operations (controls & methods)

displayed in the order in which they are inserted

In the tree

• Right clicking on any object

– launches a context sensitive menu

– Example: contains commands to generate, preview, clear mesh etc.

Page 10: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

10 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Details View

Accessing Object Details

• Select an object (in the Outline)

– Related information to that object are displayed in the Details View below

– Ex: Select a body (“Fluid”) in the Outline

Details of “Fluid” : contains graphical and geometric details

– To access meshing details

Click the Mesh object or any of the inserted objects

• The Details View provides options to

– review,

– edit or

– input

values for every object in the Tree

Page 11: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

11 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Geometry Configuration – Multiple Parts

• Geometry composed of Multiple parts

– No connection between parts (no face sharing)

‘Contact Region’ is automatically created between 2 faces

Each part meshed independently

Results in Non-conformal interface. Meshes do not match. No nodes connection.

Independent faces

Grid interface - Fluent

GGI - CFX

Page 12: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

12 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Geometry Configuration – Multi-body Parts

• Geometry composed of multiple bodies in a part

– Depend on ‘Shared Topology method’ (in DM)

None o Results in a none connection between the bodies (similar to multiple parts)

Automatic

Faces in contact imprinted & fused Form a single face shared between the 2 bodies

Results in Conformal mesh

Common face acts as ‘Interior’

Page 13: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

13 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Geometry Configuration – Multiple – body Parts

• Geometry composed of multiple bodies in a part

Imprints

Faces are imprinted on each other ‘like’ faces

Contact Region is automatically created

non conformal interface

For identical mesh on these faces, use ‘Match Control’ Results in unconnected mesh

Grid interface - Fluent

GGI - CFX

Page 14: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

14 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Meshing – 3D Geometry

• 3D cell Types

• First Meshing Approach

Part/Body based • Meshing occurs at part or

body level. • Meshing Methods are scoped

to individual bodies. • Method assignment can be

automatic or manual. • Bodies contained in one part

are conformally meshed.

Part/Body Methods • Tetrahedrons.

− Tetras only

• Sweep. − Prisms & hexahedrons

• MultiZone. − Mainly hexahedron

• Hex Dominant − Not for CFD

• Automatic. − Sweep + PC Tet

(Depends on bodies) or PC Tet

Page 15: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

15 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Meshing – 3D Geometry

• Second Meshing Approach

Cut Cell Meshing Assembly Meshing • Meshes an entire model in one

process. − Assembly of parts

• Performs boolean operations. − Volume filling, intersection &

combination − Does not require prior fluid body

definition or shared topology.

• Conformal mesh created across parts.

Assembly Meshing

Methods • Generate mainly

− Hexahedrons − Tetrahedrons

Part/Body Meshing & Assembly Meshing

not interoperable

Page 16: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

16 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Summary

What have we learnt in this session:

• The global process to run ANSYS Meshing

• On overview of the interface and

• The various Geometry configurations

– Multiple parts

– Multi-body parts

– Multiple body parts

• Meshing methods

– Part/body based

– Assembly meshing

And the associated

shared topology option

Page 17: Lecture 3: Introduction to ANSYS Meshing - eCoursesecourses.ou.edu/...Intro_16.0_L03_Introduction_to_Ansys_Meshing.pdf · Lecture 3: Introduction to ANSYS Meshing ... Introduction

17 © 2015 ANSYS, Inc. February 12, 2015 ANSYS Confidential

Workshop 3.1 – Ansys WB Meshing Basics