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CastNet-Modeling for OpenFOAM ® CastNet: Modeling and meshing environment for CFD and FEA PowerPoint Presentation
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CastNet-Modeling for OpenFOAM ® CastNet: Modeling and meshing environment for CFD and FEA CAD-Model based (reads Parasolid -xt, Acis –sat or Granite Pro-E parts) Generates hybrid meshes CFD specific features (boundary-layer-meshing)

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slide1

CastNet-Modeling for OpenFOAM®

  • CastNet:
    • Modeling and meshing environment for CFD and FEA
    • CAD-Model based (reads Parasolid -xt, Acis –sat or Granite Pro-E parts)
    • Generates hybrid meshes
    • CFD specific features (boundary-layer-meshing)
    • Direct OpenFOAM-Modeling (boundary-layer definition, zones, solver, material…)
    • CastNet is based on Simmetrix Inc. meshing, CAD preparation and abstract modeling technology

OPENFOAM® is a registered trade mark of OpenCFD Limited

This offering is not approved or endorsed by OpenCFD Limited, the producer of the OpenFOAM software and owner of the OPENFOAM® and OpenCFD® trade marks.

slide2

Example 1:

CastNet Modeling for SimpleFOAM

Mesh generated in CastNet

Meshing example: Extrusion tool

Kindly provided by Institut für Kunststofftechnik,

Universität Stuttgart

slide3

Example 1: SimpleFoam-Modeling

Parasolid model import

slide4

Example 1: SimpleFoam-Modeling

Some solver setup,

controlDict and material panels

slide5

Example 1: SimpleFoam-Modeling

Some boundary and Initial conditions

panels

Option:

Initializing with potentialFOAM

and applyBoundaryLayer

slide6

Example 1: SimpleFoam-Mesh

Extrude regions

Transition of boundary layer from free-mesh to extrude region

Extrude region

Small gaps with boundary layer

Curvature controlled meshing

slide7

Example 1: SimpleFoam-Mesh

All faces meshed with prism layers:

Able to handle difficult situations

CAD-Model

Sliver face suppression

Mesh

slide8

Example 1: SimpleFoam-Output

Automatic script export:

Case is setup with one command

Only original OpenFOAM commands and inputs are used

slide9

Example 1: SimpleFoam+ HeatTransfer Results

Rheological investigations of molding process at IKT, Stuttgart

slide10

Example 2:

CastNet Modeling for rhoPorousSimpleFOAM

Mesh generated in CastNet

slide11

Example 2: rhoPorousSimple-Foam-Modeling

Addressing of porous regions in CAD-Model (highlighted in white)

slide12

Example 2: rhoPorousSimple-Foam-Modeling

Addressing of baffle-faces in CAD-Model (highlighted in white)

slide13

Example 2: rhoPorousSimple-Foam-Mesh

Extrude with various section diameters

Transition of prism-layer from extrude to free-mesh

Extrude with mesh distribution

slide14

Example 2: rhoPorousSimple-Foam- Mesh

Boundary-Layer

Transition from baffle Face

slide16

Example 3:

  • CastNet Modeling for InterFOAM
  • Meshing with Snappy-Hex-Mesh
  • Reason for additional snappyHexMesh-Modeling:
  • In general:
  • Providing a single modeling environment that covers the various demands of different OpenFOAM solvers or numerical methods
  • In particular:
  • Hex-dominant meshes work better with certain solver (e.g. *InterFOAM)
  • Grid studies can be easily carried out (switch from CastNet-Meshing to snappyHexMeshing without changing solvers, models or boundary definitions)
  • Surface grid can be still generated in CastNet based on poor and defect CAD models (base for snappyHexMesh volume mesh)
slide17

Example 3: InterFOAM with SnappyHexMesh-Modeling

Refine faces and layer faces can be picked in the CAD-model

SnappyHex-Mesh Calculator estimates blockMesh-Parameter and subdivisions

Solver-setup and boundary definition just like in CastNet-Meshing

slide18

Example 3: InterFOAM with SnappyHexMesh-Modeling

All SnappyHexMeshDict-Parameters can be set

Local init with setFields

Option to define more

parameters

slide19

Example 3: InterFOAM with SnappyHexMesh-Modeling

Exports:

SnappyHexMeshDict

BlockMeshDict

Special stl-File

+ scripts to manage the mesh and job

Example:

Face-Handling

Faces are automatically collected to boundary-Patches

using createPatch after the meshing

Exported snappyHexMeshDict:

All faces are available:

slide21

Example 3: InterFOAM with SnappyHexMesh: Results

Animation will be shown in display mode