nullIntroduction to GAMBITIntroduction to GAMBITGAMBIT Agenda (Day 1)GAMBIT Agenda (Day 1)8:00-9:30 Introduction to GAMBIT + Demo
9:30-10:00 Tutorial: Creating and Meshing a Basic Geometry
10:00-11:00 Creating Geometry in GAMBIT
11:00-12:00 Exercise 1: Geometry Creation
12:00-1:00 Lunch
1:00-2:00 Edge and Face Meshing
2:00-2:45 Exercise 2: 2D Geometry and Mesh Generation
2:45-3:45 Volume Meshing
3:45-4:30 Exercise 3: 3D Geometry and Mesh Generation
4:30-5:00 Volume Decomposition ExamplesGAMBIT Agenda (Day 2)GAMBIT Agenda (Day 2)8:00-9:00 Mesh Control Through SF’s and BL’s
9:00-10:00 Exercise 4: Mesh Control through SF’s and BL’s
10:00-11:00 CAD/CAE Data Exchange and Geometry Cleanup
11:00-12:00 Tutorial: Virtual Cleanup (Tutorial 5 – Sedan Geometry – Virtual Cleanup)
12:00-1:00 Lunch
1:00-2:00 Geometry Cleanup Tools + Demo
2:00-3:00 Tutorial: Geometry Cleanup (Tutorial 13 – Catalytic Converter or Tutorial 14 – Airplane Geometry)
3:00-3:30 Exercise 5: Volume Decomposition
3:30-5:00 Exercise 6: Flow Probe or GAMBIT to FLUENT Tutorials (2D Asymmetric Diffuser or 2D Turbine Cascade)
What is GAMBIT?
Geometry And Mesh Building Intelligent ToolkitWhat is GAMBIT?
Geometry And Mesh Building Intelligent ToolkitA single, integrated preprocessor for CFD analysis:
Geometry construction and import
Using ACIS solid modeling capabilities
Using STEP, Parasolid, IGES etc. import
Cleanup and modification of imported data
Mesh generation for all Fluent solvers (including FIDAP and POLYFLOW)
Structured and Unstructured hexahedral, tetrahedral, pyramid, and prisms.
Mesh quality examination
Boundary zone assignmentOperationOperationGeneral sequence of operations
Initial setup
Solver selection, Mesh size, Defaults, etc.
Geometry Creation (ACIS, STEP, CATIA, Parasolid, IGES or Mesh import)
Create full geometry
Decompose into mesh-able sections
Meshing
Local meshing: Edge, Boundary layers and Size Functions
Global meshing: Face and/or Volume
Mesh examination
Zone assignment
Continuum and Boundary attachment
Mesh exportGAMBIT Start-upGAMBIT Start-upGAMBIT can be started up using the startup icon (Windows XP/2000 only). GAMBIT can be also started up from a DOS command prompt or LINUX/UNIX prompt by typing in “gambit Session Id”.Gambit 2.2.30Files (1) Files (1) GAMBIT directory and files
When GAMBIT starts up, it creates a directory called GAMBIT.#
# = the process number
It also creates a "lock" file, ident.lok, in the working directory
ident.lok prevents any user from starting up another session using the same identifier in the same directory. If the code crashes, this file needs to be manually removed.
Three files are created inside this directory
ident.dbs =
jou =
trn =the database. All information will be saved in this file. This file is NOT retrievable upon a crash
the journal file. This file is directly accessible from the Run journal form
the transcript file. Output from GAMBITFiles (2) Files (2) GAMBIT directory and files
GAMBIT permanently saves these files to your working directory as ident.dbs, ident.jou and ident.trn anytime you issue a "Save" option (equivalent to any standard word processor)
Upon Save, earlier versions of ident.dbs and ident.trn will be overwritten, while new commands are appended to the file ident.jou
Upon successful exit of GAMBIT:
The directory GAMBIT.# is removed
The lock-file ident.lok is deletedJournal FilesJournal FilesJournal File:
Executable list of Gambit commands
Created automatically by Gambit from GUI and TUI.
Can be edited or created externally with text editor.
Journals are small - easy to transfer, e-mail, store
Uses:
Can be parameterized, comments can be added
Easy recovery from a crash or power loss
edit existing commands to create new onesRunning Journal FilesRunning Journal FilesJournal files can be processed in two ways:
Batch mode (Run)
All commands processed without interruption.
"read pause" command will force interrupt with resume option appearing.
Interactive mode (Edit/Run)
Includes text editor for easy modifications
Mark lines in process field to activate for processing.
Editable text field.
Right click text field for more options.
Auto or Step through activated process lines.GUIGUIMain Menu barGlobal Control Operation toolpadCommand line Description window Operation Tool PadsOperation Tool Pads
Vertex
Edge
Face
Volume
Group
Boundary Layer
Edge
Face
Volume
GroupBoundary Types
Continuum TypesCoordinate Systems
Sizing Function
G/Turbo
Geometry Cleanup
Plug-In Tools File Menu (1) File Menu (1)New, Open, Save, Save As and Exit
Standard form of database operations
Print Graphics
Prints graphics to printer or to file
PostScript, BMP, TIF, etc.
Run Journal / Clean Journal
Screen editor/command processor for journal files
Command processing:
Partial or global selection/de-selection
Automatic or stepwise processing
Ability to load the current journal
File browser
Clean Journal removes unnecessary tags, undo’s, etc.File Menu (2)File Menu (2)View File
View of the current output,ident.trn, the transcript file
Ability to view other files as well
Import
ACIS, Parasolid -
IGES, STEP, Catia V4 -add on)
ICEM Input, Vertex Data
CAD - Pro/E (STEP or DIRECT- add on), Optegra Visualizer, I-DEAS FTL
Mesh - mesh and faceted geometry files.
Export
ACIS, Parasolid
IGES, STEP
Mesh - Export your mesh for your Solver.
Export 2D Mesh option guarantees 2D mesh
Edit Menu (1)Edit Menu (1)Edit Title
Title will be included on any printed graphics
Edit File
Ability to launch an editor within GAMBIT
Edit Parameters
Ability to define, modify and list parameters
parameters: $numeric = 10,
arrays: $array(3,4) = 5
Parameters and arrays can also be directly defined in the journal file using an editor (preferred option)Edit Menu (2)Edit Menu (2)Edit Defaults
Modify a large range of defaults that effect:
User Environment
Meshing Characteristics
Geometry
Ability to load, modify and save a new set of defaults in $HOME/GAMBIT.ini which is loaded automatically at startup.
Undo/Redo
Ten levels of undo/redo (default)
Reducing number of levels also reduces memory requirements.
Solver MenuSolver MenuThe Solver selection will have an impact on the following input forms:
Available meshing algorithms
Available element types
Continuum types
Boundary types
Export mesh fileGraphical User InterfaceGraphical User InterfaceCommand:
Input of (non-GUI) commands, e.g.,
reset: deletes all mesh and geometry in the current model
reset mesh: deletes mesh, keeps geometry
Transcript
Output from GAMBIT is printed here as well as in ident.trn
Transcript window can be expanded using arrow button in top right corner
Description
Gives a short description of all global function buttons and screen areasGlobal Control (1)Global Control (1)
Global Control (2)Global Control (2)Scale-to-fit resizes the model to fit the screen
Orient Model - major axes , isometric and:
Reverse
Previous
Journal view
Select Pivot - around which the model rotates, zooms
Body center
Mouse position
Model display attributes
Turn on/off visibility, label, silhouette, mesh and hidden line on all or selected geometrical entities
Preset configuration of the graphics window
4-view and 4-split
Options to return to any single view
Global Control (3)Global Control (3)The Window Attributes form
Modify the following attributes (defaults given)
Render Wireframe on ; shaded and hidden off
Mesh Volume - off
Silhouette All on
Label All off
Visibility All on
Two ways of picking entities
"All" - All entities are picked (Default)
"Pick" - Individual picking including the use of pick listsGlobal (4)Global (4)Render Model - Wireframe , Shaded , Hidden
Modify Light/Label type
Change light source orientation and properties
Additional information on the entity label
Insert arrows and text for graphic presentations
Color Mode
Color by entity
Color by connectivity
Undo/Redo
Examine Mesh
Display different element types by quality, plane cuts, etc.Forms (1)Forms (1)Form - components
List box - (picking)
active (yellow) - ready to pick
inactive (white) - click to activate
Radio buttons
mutually exclusive options
Option button
Option menu
Text box
Click-to-focus
Check box
non-mutually exclusive options
Command buttons
Forms (2)Forms (2)Text box
Field for input of data, expressions, parameters
The cursor is blinking if active
To activate - left click in the text box (click-to-focus)
Forms with several text boxes
The order of input is not important
Use "tab" to go to the next text box
Use left click (click-to-focus) to go to any text box Forms (3)Forms (3)List box
Highlighted in yellow if active
To activate - left click in the list box
Tells you the name of the latest picked item
The item is highlighted in red on the screen
All previously picked items are pink
Individual pick lists for each list box
Forms with several list boxes:
Depending on the form, the order of picking may be important
Use Shift right-click to go to the next list box
Use left click (in the list box) to go to any list box
Forms (4)Forms (4)Pick Lists
Open the Pick List by clicking on the arrow
The "Available" list is sorted in the order of picking
Pick List functionality:
Pick or Un-pick, Selected or All entities by highlight in left column and by clicking on the arrows
Highlighted "picked" entities will appear red on the screen
edge.32, edge.33
Non-highlighted “picked” entities will appear pink
edge.26, edge.28
Right-click in lists area provides additional options
Filter can be used to control which objects are picked.Mouse Operations (1)Mouse Operations (1)You can toggle between picking with or without "Shift":
Keep right mouse button down while doing a "left-click"
The cursor now changes to another symbol
Now, Pick/Next/Accept do not need a "Shift"
The Rotation/Translation/Zoom now needs a "Shift"”Mouse Operations (2)Mouse Operations (2)The picking philosophy: Left - Middle - Right
Shift-Left: initial pick
Alternative: click and hold, drag diagonally to pick several items at the same time – "window picking"
Upward diagonal picking will include everything fully included in the box
Lower diagonal picking will include everything partially included in the box
The latest pick is highlighted in red, previously picked items are highlighted in pink
Picking Five FacesPicking One FaceMouse Operations (3)Mouse Operations (3)The picking philosophy: Left - Middle - Right
Shift-Middle: modify pick
The middle pick will behave differently depending on the mouse location:
Same: Cycle to the next available object within picking tolerance
New: Replace last pick with new pick at new location
Bad: A Shift-Middle pick on "nothing"is equivalent to "Un-select last pick”
Shift-Right: Apply or go to the next list box
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