f3 ws3-3dpipejunction ogridv12
TRANSCRIPT
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WS6.3-1ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Chapter 6
Introduction to HexaWorkshop 33D Pipe JunctionO-grid Creation
ICEM CFD IntroductoryCourse
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Introduction to Hexa Workshop 3
WS6.3-2ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training Manual3D Pipe Junction- Ogrid
3D Pipe Junction
In this workshop, we willimport already createdblocking on 3D Pipe geometry.
After checking the quality offirst mesh, we will create an O-grid in the blocking to improve
mesh quality.
Save the blocking.
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Introduction to Hexa Workshop 3
WS6.3-3ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training ManualSet Working Directory
Set Working Directory
File > Change Working Directory
This will pop up a window. Selectthe directory 3DPipeJunct whereinitial project file has been saved.
It provides access to selected
directory directly All output files will be saved in
same folder until user change thelocation
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Introduction to Hexa Workshop 3
WS6.3-4ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training ManualOpen Geometry
Open Geometry
File > Open Geometry
Choose 3DPipeJucnt.tin file
Click Open
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Introduction to Hexa Workshop 3
WS6.3-5ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training ManualOpen Blocking
Open Blocking
File > Open Blocking
Choose 3DPipeJucnt.blk file
Click Open
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Introduction to Hexa Workshop 3
WS6.3-6ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training ManualBlocking Strategy
Blocking strategy
We have created Cartesian gridin 3D pipe junction in previousworkshop.
To improve the mesh quality andcapture the geometry we will becreating the Ogrid in this
workshop and compare both the
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Introduction to Hexa Workshop 3
WS6.3-7ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training ManualCompute Mesh
Compute Mesh
Select Pre-Mesh in tree
This will pop up and windowasking for re-compute mesh
Click on Yes
This will generate and
display Pre-Mesh
Mesh with 3.5 size
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Introduction to Hexa Workshop 3
WS6.3-8ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training ManualQuality Check
Quality Check
Select Blocking > Pre-MeshQuality Histogram
Select Quality in Criterion
Click Apply
Right click on Histogram
and select Show. This willdisplay the selectedelements.
Elementsselected to show
Bad quality elementsare displayed
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Introduction to Hexa Workshop 3
WS6.3-9ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training Manual
#1
#2
#3
#4
#5
O-Grid Creation Select Split Block > OGrid block
Select highlighted two Blocks andmiddle click to confirm.
Select faces highlighted in blue colorto end ogrid there. Middle click to
confirm.
Define Offset value
Click Apply
OGrid
removes bad elements
Captures geometry very well
Generates high quality mesh
OGrid Creation
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Introduction to Hexa Workshop 3
WS6.3-10ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training ManualPre-Mesh Params setting
Update Meshing Parameters
Select Pre-Mesh Params >
Meshing Parameters Select Update All
Click Apply
This will update all the parametersfor Hex Meshing
After modifying the blocking, it is
good practice to update meshingparameters to get good mesh.
#1
#2
#3
#4
Pre-mesh without updating
meshing parameters
Pre-mesh after
parameter update
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Introduction to Hexa Workshop 3
WS6.3-11ANSYS, Inc. Proprietary
2009 ANSYS, Inc. All rights reserved.July 2009
Inventory #002663
Training ManualQuality compare
Mesh Quality
Mesh quality is improvedafter ogrid creation
Initial
Determinant 2*2*2
ImprovedDeterminant 2*2*2
Initial Quality
Improved Quality
After Ogrid Creation
Before Ogrid Creation
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Introduction to Hexa Workshop 3
WS6.3-12ANSYS, Inc. Proprietary
2009 ANSYS Inc All rights reservedJuly 2009
Inventory #002663
Training ManualSave Blocking
Save Blocking As
Select File > Save BlockingAs..
Instead of saving project filefor each stage after fewoperation user can saveblocking file only.
Optimize the memory usage.
Save modified blocking as3DPipeJunct_ogrid.blk
Click Save.