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WANG XiaoTechnical ManagerFluent Asia Pacific
June 12, 2006
2006 CFD Summit Share . Inspire . Learn . Connect
FLUENT Product Presentation
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Agenda
FLUENT 6: Release History
Next Release: FLUENT 6.3Current StatusNew Core FunctionalityOther Enhanced Areas
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Agenda
FLUENT 6: Release History
Next Release: FLUENT 6.3Current StatusNew Core FunctionalityOther Enhanced Areas
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FLUENT 6 Release History
FLUENT 6.0Dec 2001
FLUENT 6.1Feb 2003
FLUENT 6.2Mar 2005
FLUENT 6.3Fall 2006
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Agenda
FLUENT 6: Release History
Next Release: FLUENT 6.3Current StatusNew Core FunctionalityOther Enhanced Areas
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FLUENT 6.3: Current Status
New feature versionImportant new core numerics functionality Enhanced physical modeling capabilitiesCustomer-requested enhancements
Beta testing began in September 2005Available at http://www.fluentusers.com/fluent63_beta/
Release is estimated for Fall 2006
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Agenda
FLUENT 6: Release History
Future Plans: FLUENT 6.3Current StatusNew Core Numerics FunctionalityOther Enhanced Areas
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FLUENT 6.3
New Core Numerics Functionality
FLUENT 6.3 Draft Documentation is available athttp://www.fluentusers.com/fluent63_beta/
FLUENT 6.2 FLUENT 6.3
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FLUENT 6.3
New Core Numerics FunctionalityPressure-based coupled solver
Improved convergence and robustness for skewed/stretched meshes and “stiff” problemsConvergence rates not sensitive to mesh sizeLittle need to change relaxation factorsAbility to switch on-the-fly to fully segregated solver
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FLUENT 6.3 – Intake Manifold
Pressure-Based Coupled Solver
3.5800Segregated1.4150Coupled
Time (hours)
IterationsPressure-Based Solver
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
Carbue
torInl
et1Inl
et2Inl
et3Inl
et4Inl
et5Inl
et6Inl
et7Inl
et8
Mas
s Fl
ow R
ate
(kg/
s) CoupledSegregated
Contours of Static Pressure
651K Cells、K-Epsilon、Ideal-Gas LawMach Number:0.5
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Position
Neg
ativ
e P
ress
ure
Coe
ffici
ent
FLUENT 6.3 – Drag Prediction for DLR-F4
Pressure-Based Coupled Solver
2.21503.5Pressure-Based Coupled
11.89004.0Density-Based Implicit
3.18002.2Pressure-BasedSegregated
Time to convergence
[h]
Iterations to convergence
Memory [GB]
SolverMach Number = 0.75Reynolds Number = 3e6
Angle of Attack = 2o
η = 0.50+ Density Based+ Pressure Based+ Pressure Based
Coupled
1.8 M Hex, RKE, Ideal Gas
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FLUENT 6.3
New Core Numerics FunctionalitySupport for polyhedral meshes
Automatic cell agglomeration in the solverReduces original tetrahedral mesh by 3-5x
Results in faster convergenceCell skewness-based agglomeration
Improves mesh qualityAbility to examine mesh qualityAbility to use built-in tools to manipulate mesh
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FLUENT 6.3 - F18
Polyhedral Mesh
Contours of Static Pressure
Original tet/hybrid mesh: 220K cellsNew polyhedral mesh: 58K cells
Mesh
Density-Based Coupled-Implicit, Inviscid Euler Solution
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FLUENT 6.3 - Scrubbers for Flue Gas Clean-up
Polyhedral Mesh
Courtesy of Austrian Energy and Environment AG, Austria and the Institute for Process Technology & Environmental Protection,
University of Loeben, Austria
Original tet/hybrid mesh: 1.25M cellsNew polyhedral mesh: 250K cells
External Mesh Mesh in the Spray Bank
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FLUENT 6.3 - Scrubbers for Flue Gas Clean-up
Polyhedral Mesh
Particle Tracks Colored by Particle Diameter
Contours of SO2 Mass Fraction on 4 Slices Within the Scrubber
Courtesy of Austrian Energy and Environment AG, Austria and the Institute for Process Technology & Environmental Protection,
University of Loeben, Austria
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Agenda
FLUENT 6: Release History
Future Plans: FLUENT 6.3Current StatusNew Core Numerics FunctionalityOther Enhanced Areas
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FLUENT 6.3
Other Enhanced Areas
Moving MeshSolverParallelTurbulencePorous MediaReacting Flows MultiphaseDPMRadiationReporting and Post-Processing
Other General FeaturesAdd-On Modules
Population BalanceFuel Cells
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FLUENT 6.3
Moving MeshSliding Mesh
Many-to-many sliding interfacesCreate/delete using dynamic mesh events
Dynamically switch from MRF to sliding meshRetain the MRF solution as an initial guess
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FLUENT 6.3
Moving MeshDynamic Mesh
Dynamic mesh for steady-state applications
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FLUENT 6.3 – Check Valve
Steady-State Dynamic Mesh
Whole Geometry
Valve Seat Area
0.2515
0.2520
0.2525
0.2530
0.2535
0.2540
0.2545
0.2550
0.2555
1.50E+04 1.60E+04 1.70E+04 1.80E+04 1.90E+04
Iteration Number
Valv
e Li
ft (m
m)
0.00.10.20.30.40.50.60.70.80.91.0
0.23 0.24 0.25 0.26 0.27 0.28
Lift (mm)
Forc
e (N
)
Aerodynamic forceSpring force
Contours of Static Pressure
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Dynamic Mesh Dynamic mesh for steady-state applications
FLUENT 6.3
Moving Mesh
More straightforward user-defined motionUser-defined boundary deformationExtrusion of user-defined node motion on a surface
2.5D model
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FLUENT 6.3 – Wing Surface
User-Defined Boundary Deformation
Contours ofAbsolute Pressure
Mesh Motion with Contours of Absolute Pressure
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FLUENT 6.3
Moving MeshDynamic Mesh
Dynamic mesh for steady-state applicationsMore straightforward user-defined motion
User-defined boundary deformationExtrusion of user-defined node motion on a surface
2.5D modelMore convenient in-cylinder modeling
Absolute crank angle as time unit
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FLUENT 6.3
SolverGeneral Solver
Improved efficiency for transient flows Alternative convergence criteria
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FLUENT 6.3 – 3D Delta Wing
Alternative Convergence Criteria
05000
10000150002000025000
Absolute Relative Combined None
Total Iterations
XY Plot of Static Pressure
142009726 9112
25000
Contours of Static Temperature
RelativeAbsolute
Combined None
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FLUENT 6.3
SolverGeneral Solver
Improved efficiency for iterative time advancementAlternative convergence criteria
Diagnostic tool for checking initial case settingsCase Check
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FLUENT 6.3 – Example Recommendations
Case Check
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FLUENT 6.3
SolverDensity-Based Solver
Improved shock capturingAdvection Upstream Splitting Method plus (AUSM+) scheme
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FLUENT 6.3 – Supersonic Moving Shock
AUSM+ Scheme
Roe-FDS AUSM+
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FLUENT 6.3
SolverDensity-Based Solver
Improved shock capturingAdvection Upstream Splitting Method plus (AUSM+) scheme
Improved accuracy and convergence for skewed and stretched meshes
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FLUENT 6.3 – 2D Driven Cavity
Improvements for Skewed MeshesMesh Size: 204,800 tri cellsMax Aspect Ratio: 200,000Max Skew: 0.999Re = 400
Convergence History
Streamline Contours
StretchedUn-Stretched
U-Velocity at Centerline
Mesh Detail
Highly-Skewed Cells
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FLUENT 6.3
ParallelParallel File Read/Write
Speed-up in data file read/writeSpeed-up in case file write
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FLUENT 6.3
Parallel Data File Write
9.834
5.282Xeon/GigE
5.612Opteron/Infiniband
6.334
6.68
Speed-upFLUENT 6.3 /FLUENT 6.2
Number of CPUsPlatform and Interconnect
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FLUENT 6.3
ParallelParallel File Read/Write
Speed-up in data file read/writeSpeed-up in case file write
Other Parallel EnhancementsAdditional flexibility for load balance management
Assignment of selected zones and/or registers to specific parallel partitions
Ability to read hexcore meshes directly into parallel
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FLUENT 6.3
TurbulenceTurbulence
Two-equation RANS models for DESNew time statistics for LESRSM improvements for low-Re simulationsUser-defined wall functions for k-epsilon models
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FLUENT 6.3
Porous MediaPorous Media
Moving porous mediaImproved stability for anisotropic porous media
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FLUENT 6.3
Reacting FlowsReacting Flows
Increased limits: 300 species and 1500 reactions Unsteady laminar flamelets for slow chemistry
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FLUENT 6.3 – Competitive Liquid Reactions
Unsteady Laminar Flamelets
Percent Conversion of Species D
A B+D
H+ + OH- ——> H2O(A) (B) (P1)
H+ + CH3C(OCH3)2CH3 ——> H+ + CH3COCH3 + 2CH3OH(A) (D) (A) (P2) (P3)
K1
K2
K1 = 1.4e8 m3/mol.sK2 = 0.673 m3/mol.s
3.5%12.6%22.4%Unsteady Flamelet
4.4%12.9%19.5%PDF Transport
16.64.142.1Inlet Jet Velocity (m/s)
Contours of Turbulent Kinetic Energy
Reactions
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FLUENT 6.3
Reacting FlowsReacting Flows
Increased limits: 300 species and 1500 reactions Unsteady laminar flamelets for slow chemistry
In-Cylinder Modeling EnhancementsIgnition delay model for partially-premixed combustionLaminar flame speeds for gasolineDiesel material
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FLUENT 6.3
Reacting FlowsPollutants
Selective non-catalytic reduction of NOx (SNCR) through urea injectionSOx formation model
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FLUENT 6.3 – SOx Formation in a Combustor
SOx
Whole Geometry
Inlet Geometry
Contours of SO2 Mass Fraction
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FLUENT 6.3
MultiphaseAll Multiphase Models
Compatible with shell conductionImproved accuracy for transient simulations
2nd-order time discretization scheme
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FLUENT 6.3 –Flow Around a Cylinder
Second Order Time Discretization
cylinder
water
air
VOF with LES and NITA Time-Averaged Water Elevation Behind the Cylinder
FLUENTExperimental Data
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FLUENT 6.3
MultiphaseEulerian Multiphase
Compressible Eulerian multiphase Both gas and liquid phases
Mass flow rate inlet boundary conditionNew options for modeling slow granular flowCompatible with the mixing plane model
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FLUENT 6.3
MultiphaseVOF
Improved stability for flows with high viscosity ratiosCICSAM
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FLUENT 6.3 –Nylon Mold-Filling
CICSAM
Animation of the Nylon-Air Interface During Filling
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FLUENT 6.3
MultiphaseVOF
Improved stability for flows with high viscosity ratiosCICSAM
User-defined wall contact angle
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FLUENT 6.3
Discrete PhaseDiscrete Phase Model
Multicomponent vaporization of particles/dropletsCoupling between multicomponent droplets and the continuous phase
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FLUENT 6.3 – Droplet Vaporization
Multicomponent Droplets
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FLUENT 6.3
Discrete PhaseDiscrete Phase Model
Multicomponent vaporization of particles/dropletsCoupling between multicomponent droplets and the continuous phase
New injection optionsMoving surfaces Surface normals
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FLUENT 6.3 – Store Separator
New Injection Options
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FLUENT 6.3
Real Gas ModelReal Gas Model
Ability to model multiple species in a real gasNIST real gas modelUser-defined real gas model
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FLUENT 6.3
RadiationSurface-to-Surface Radiation
Increased applicabilitySupport for axisymmetric casesMultiple cell zones in an enclosureSpecification of participating flow boundaries
Faster and more efficient calculationNew surface clustering algorithm
Supports adaption as well as hexcore and Harpoon meshesNew view factor storage format
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FLUENT 6.3 – Small Underhood Case
New Surface Clustering Algorithm
40 sec1 min 36 sec413 sec40 sec29 sec1 min 50 secSerial
New Algorithm –17593 clusters
Old Algorithm –10162 clusters
Number of Processors
Time for Surface Cluster Writing (wall clock time)
New S2S Model DO Model
Contours of Static Temperature
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FLUENT 6.3 – Small Underhood Case
New Format for Viewfactor Files
15.48 Mb17.24 MbFile Size
37 sec3 min 50 sec8
18 sec1 min 28 sec4
9 sec1 min 25 sec2
7 sec1 min 7 secSerial
New FormatOld FormatNumber of Processors
Time to Read Files into FLUENT 6.3
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FLUENT 6.3
RadiationSurface-to-Surface Radiation
Increased applicabilitySupport for axisymmetric casesMultiple cell zones in an enclosureSpecification of participating flow boundaries
Faster and more efficient calculationNew surface clustering algorithm
Supports adaption as well as hexcore and Harpoon meshesNew view factor storage format
Ability to post-process incoming incident radiation
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FLUENT 6.3
RadiationDiscrete Ordinates
Improved efficiency for very high optical thicknesses (>10)Coupled solution of discrete ordinates and energy equationsGray and non-gray models
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FLUENT 6.3
User-Defined FeaturesUser-Defined Scalars
Increased flexibility Ability to solve UDSs inside solidsAbility to select UDS for specific zonesAbility to specify flux function and unsteady hooks per UDSAnisotropic diffusivity for UDSs
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FLUENT 6.3 – Drug-Eluting Stent
Anisotropic Diffusivity
1 hr
Drug Distribution in the Vessel Wall
12.5 hr 25 hr
Mesh
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FLUENT 6.3
User-Defined FeaturesUser-Defined Scalars
Increased flexibility Ability to solve UDSs inside solidsAbility to select UDS for specific zonesAbility to specify flux function and unsteady hooks per UDSAnisotropic diffusivity for UDSs
User-Defined FunctionsExecute at exit UDF hookAbility to associate multiple UDFs to a single hook
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FLUENT 6.3
Post-Processing and ReportingReports and Monitors
New report typesStandard deviationVolume flow rateMinimum and maximum value in a cell zoneCenter of pressure on walls
Write report results to a fileSpecify monitor interval for surface and volume monitorsRestrict histograms to specific zones
Post-ProcessingColormap label control
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FLUENT 6.3
Other General FeaturesData Import/Export
Improved data import/export format compatibilityincluding ANSYS cdb format
Export polyhedral cells to both EnSight and FieldviewExport particles and pathlines in EnSight formatSupport for Tecplot export in the parallel version of FLUENT
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FLUENT 6.3
Other General FeaturesImproved Usability for the Text User Interface
Command HistoryCommand Line Editing
MiscellaneousLog10 operator for custom field functionsAppend autosave filenames with the flow time
Platform SupportWindows 64-bit support for Opteron and Xeon EM64T
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Future Plans: FLUENT 6.4
New feature versionPlanning is currently underwayDevelopment will start this summerRelease is targeted for early 2008
FLUENT 6.3
FLUENT 6.0
FLUENT 6.1
FLUENT 6.2
FLUENT 6.4
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Agenda
FLUENT 6: Release History
Next Release: FLUENT 6.3Current StatusNew Core Numerics FunctionalityOther Enhanced Areas
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Conclusion
FLUENT 6 continues to provide new and improved functionality in many areas
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Thank You
Please pick up a copy of the “New Features in FLUENT 6.3” document available at the registration table or at the FLUENT product table in the CFD pavilion