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NSF-REU Weekly Schedule
Make daily schedule each week at the start of the week
Week 1. Done
Week 2. ALMOST DONE
Learn ANSYS 13
Do 2D and 3D models (fluid or structure)
Simple first, complex later
Cornell and Book Tutorials
Animation Tutorials inside of Ansys
If unable, learn TecPlot
If unable, learn Paraview
https://confluence.cornell.edu/display/SIMULATION/FLUENT+Learning+Modules
Mike-Bring in Lab reports + ANSYS 13 Book
Chase-Bring in intermediate fluids notes and book
Butterfly made in SOLIDWORKS is here!
Week 3.
Start Butterfly Models
Steady scale models
Unsteady Scale Models
UDF for variable boundary conditions
UDF for varying the velocity in FLUENT
Bottom plate with scales are moving
Top plate moving for comparison
Dynamic Meshing
John’s 2D external flow model
Start Supersonic Fuel Injector Models
Week 4.
More butterfly models
3D Steady and Unsteady Couette Flow w/ Cavities
Results Briefing
More supersonic fuel injector models
Week 5.
Week 6.
Week 7.
3D simulation- Butterfly
Week 8.
3D simulation- Butterfly
Week 9.
3D simulation- Butterfly
Week 10
Compile all results
WEEK 2 DAILY SCHEDULE:
Learning FLUENT
https://confluence.cornell.edu/display/SIMULATION/FLUENT+Learning+Modules
Tuesday:
8AM: Begin first Tutorial from Cornell:
1) Flat Plate Boundary Layer
Key Points to take away:
Geometry-surface from sketch
Meshing-edge sizing
What is a Bias Factor? The ratio of the longest division and the shortest division
Fluent- 64 bits for double precision and 32 bits for single-precision The downside of using double precision is that it requires more memory.
Fluent- Plotting from Blasius direct theoretical solution
When Plotting make sure to rename whatever plot ending in “.xy” as you plot in the XY PLOT section
2) Steady and Unsteady Flow past a cylinder
Key Points to take away:
geometry- create surface from sketch.
2D model
Boolean operation (subtration-create)-outer surface body as target body
inner surface body as tool body
Sketching line on y-axis of both circles and trim away outer and inner part to creat two lines
concept--> line from sketch to create the line body
tools--> projection for surface body as target and two lines as the edge
Mesh-18432 elements
192 circumferential divisions;96 radial divisions
Mapface meshing/ Biasing to increase number of elements close to cylinder
Radial edge sizing; type=number of divisions=96
Behavior=hard; Bias type=___ __ _ Bias factor= 460
Create named selections: farfield 1, farfield 2, cylinderwall and in fluent it creates the interiors themselves.
Fluent:
cylinderwall=type=wall
farfield= type=velocity inlet=1m/s
farfiled2=pressure outlet
interior surfacebody; surface body
Reference value=density=1kg/m^3
viscosity=0.05kg/m*s
momentum=second order upwind scheme
Residuals--> xvelocity=1e-6; yvelocity=1e-6 (for absoulte criterion)
Monitors=Drag=EDIT=print to console and plot
solution initialization=1m/s (x-direction)
number of iterations= 2,000
solution converged after 1647 iterations.
Same geometry and mesh as steady state flow past a cylinder
FLUENT
solution-monitors-lift-ck print to console and write
soln initialization-adapt-region- xmin=0.5m, xmax=32m, ymin=0, ymax=032m
click mark then click close
soln-soln initialization-set compute from the farfield1-click initiate
patch-value-0.2 highlight the zone to patch, hexahedron, and yvelocity
ADVANCE SOLUTION IN TIME
soln-run calculation-time step size=0.2sec
number of time steps=200 click to calculate. Now, have a bottle of Mountain Due
Continue time stepping until you get sinusoidal variation in the lift coefficient
3) Flow over a wing
https://confluence.cornell.edu/display/SIMULATION/ANSYS+WB+-+Airfoil+-+Problem+Specification
4) Forced and Steady Convection
https://confluence.cornell.edu/display/SIMULATION/FLUENT+-+Forced+Convection+-+Problem+Specification ; https://confluence.cornell.edu/display/SIMULATION/ANSYS+WB+-+2D+Steady+Convection+-+Problem+Specification
5) Compressible flow in a nozzle and Supersonic flow past a wedge (Chase-solving in C++)
https://confluence.cornell.edu/display/SIMULATION/FLUENT+-+Compressible+Flow+in+a+Nozzle-+Problem+Specification ; https://confluence.cornell.edu/display/SIMULATION/FLUENT+-+Supersonic+Flow+Over+a+Wedge+-+Problem+Specification
Wednesday
Finish Cornell tutorials
Book tutorials-Chase fill in the rest tonight
Ansys Workbench 13
Section 2.2 & 3.1 - Triangular Plate (2D Example)
Section 4.2 & 5.2 - Cylinder Cover (3D Example) (edit and finish)
Section 4.1 & 6.2 - Beam Bracket (surface model, optional)
Section 7.3 - Two Story Building (mixed line and surface model, optional)
Section 8.2 - Triangular Plate (2D Design Optimization)
Section 9.2 - Cylinder Cover (Mesh Control and Optimization)
CFD Book Learning-Mike
Computational Fluid Dynamics Fourth Edition Volume 1.
Klaus A. Hoffmann
Steve T. Chiang
Chapter seven: Scalar Representaion of the Navier-Stokes Equations..........................272
7.3 Equations of Fluid Motion
7.4 Numerical Algorithms ….............................................................................................276
7.4.1 FTCS Explicit..............................................................................................276
7.4.2 FTBCS Explicit............................................................................................277
7.4.3 DuFort-Frankel Explicit.................................................................................277
7.4.4 MacCormack Explicit...................................................................................277
7.4.2 FTBCS Explicit............................................................................................277
7.4.2 FTBCS Explicit............................................................................................277
7.5 Applications: Nonlinear problem.................................................................................280
7.7 Problems....................................................................................................................295
Chapter Eight:
Incompressible Navier-Stokes Equations.......................................................................302
8.6 Boundary Conditions.................................................................................................322
8.8 Numerical Algorithms: Vorticity-Stream Function Formulation....................................337
8.9 Boundary Conditions.................................................................................................343
8.12 Problems................................................................................................................357
Chapter nine:
Grid Generation-Structured Grids........................................................................................358
9.3 Metrics and the Jacobian of Transformation.................................................................363
9.6 Practical Differential Equations Techniques...................................................................383
9.11 Problems....................................................................................................................420
Appendices
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Chapter one:
Classification of Partial Differential Equations..............................................................3
1.13 Problems...............................................................................................................25
Obtain cheap speakers for the computer lab!!
Thursday
Finish Any remaining Tutorials
Liquid Fuel Combustion Tutorial 9.
UDF in FLUENT
http://my.fit.edu/itresources/manuals/fluent6.3/help/html/udf/node42.htm
http://www.engr.uconn.edu/~ewebhk/buttons/flfem/fluent5/training/train89.pdf
http://www.ara.bme.hu/oktatas/tantargy/NEPTUN/BMEGEATMW02/2010-2011-I/10b_ANSYS_UDF_Intro.pdf
Batch Mode in FLUENT- use C++ to write/compile the files
-Look at the pdfs I gave you. One of them is on BATCH mode for an earlier version of FLUENT. Shouldn’t be too different with ANSYS. Read in a journal file with commands given in a precise order for your particular model. Sit back, drink a cup of coffee.
Bash in Linux- execute the Batch commnads
Seminar Lunch - Research Plan Presentations - Lab tours - FREE FOOD
Friday
Anything remaining from Thursday
Useful FLUENT Wiki link
http://www.cfd-online.com/Wiki/Fluent_FAQ
Solidworks Tutorials
http://www.solidworks.com/sw/resources/solidworks-tutorials.htm
WEEK 3 DAILY SCHEDULE:
Start Butterfly Simulations
Monday
John can you show Michael how to run BASh script in linux and Batch mode for FLUENT
look at the stuff in the email
Tuesday
UDF’s
Sinusoidal Wall Temperature
Temperature Dependent Viscosity
GRE PREP
PDEs
Dynamic Meshing
2D and 3D Adiabatic Compression (3 Tutorials)
GRE PREP
PDEs
Wednesday
Dynamic Meshing and UDF’s
Using UDF’s to control the dynamic mesh of an oscillating membrane
http://www.stanford.edu/class/me469b/handouts/programming.pdf useful UDF link
GRE PREP
PDEs
Thursday
Chase - Construct shark skin model, modify butterfly scale model
Michael - be able to compile and run UDF codes
GRE PREP
PDEs
Friday
Anything left over from Thursday
Begin looking at Rotating Machinery, Multi-phase Flow, Reacting Flow,
GRE PREP
PDEs
Training : FLUENT : Intermediate/Advanced : Tutorials
Training : FLUENT : Intermediate/Advanced : Tutorials
http://www.fluentusers.com/fluent/training/intermediate/tutorials/index.htm
Tutorials with a Focus on Reacting Flow Applications
Coal Combustion with Eddy Break Up (EBU) Model
Modeling Liquid Reactions in a CIJR using the Unsteady Laminar Flamelet Model
Simulation of a Piloted Jet Flame using Unsteady Laminar Flamelet Model
2D Simulation of a 300 KW BERL Combustor Using the Magnussen Model
Premixed Flow in a Conical Chamber using the Finite-Rate Chemistry Model
PDF Transport Simulation of a Piloted Jet Diffusion Flame
Liquid Fuel Combustion
3D Simulation of 300 kW BERL Combustor Using the Laminar Flamelet Model
NOx Modeling with the SNCR Model Using Urea Injection
Modeling Liquid Reactions in a CIJR using the Unsteady Laminar Flamelet Model
Simulation of a Piloted Jet Flame using Unsteady Laminar Flamelet Model
EDC Simulation of a Piloted Jet Diffusion Flame
Premixed Combustion in a Conical Chamber using the Zimont Model
Modeling Surface Reaction in a Single Circular Channel
Multiple Char Reactions
Partially Premixed Combustion in a Coaxial Combustor
Modeling Evaporation of Liquid Droplets in a Circular Channel
Tutorials with a Focus on Multiphase Flow Applications
Heat and Mass Transfer with the Mixture Model
Hydrodynamics of Bubble Column Reactors
Horizontal Film Boiling
Dam-Break Simulation Using FLUENT's Volume of Fluid Model
Using FLUENT's Erosion Model to Investigate Erosion in a 90 degree Elbow Bend
Using the Eulerian Multiphase Model with Species Transport
Modeling Flow and Heat Transfer in Packed Bed Reactor
Modeling Rapid Condensation of Steam in a 2D Laval Nozzle
Solving a 2D Box Falling into Water
Modeling Uniform Fluidization in 2D Fluidized Bed
Modeling Bubble Breakup and Coalescence in a Bubble Column Reactor
Spin Coating of a Rotating Circular Glass Substrate
Fuel Tank Sloshing
Continuous Steel Casting of a Round Billet
Modeling the Effect of Sedimentation Concentration in a Secondary Clarifier using a UDF
Modeling Nucleate Boiling using FLUENT
Tutorials with a Focus on Dynamic Mesh Applications
2D Adiabatic Compression (Remeshing and Spring Smoothing)
2D Adiabatic Compression (Layering)
3D Adiabatic Compression (Layering, Remeshing, and Spring Smoothing)
Solving a 2D Box Falling into Water
Simulating a 2D Check Valve using FLUENT's Dynamic Mesh Model and Spring Smoothing
Submarine Docking Simulation Using MDM Model
Using a UDF to Control the Dynamic Mesh of a Flexible Oscillating Membrane
Solving a 2D Vibromixer Problem Using the Dynamic Mesh Model
Store Separation from a 3D Delta Wing
Projectile Moving Inside a Barrel
Tutorials with a Focus on User Defined Functions
Calculation of Flow Uniformity
Position Dependent Porous Media
Temperature Dependent Viscosity
Using a UDF to Control the Dynamic Mesh of a Flexible Oscillating Membrane
Sinusoidal Wall Temperature Variation
Modeling the Effect of Sedimentation Concentration in a Secondary Clarifier using a UDF
http://www.stanford.edu/class/me469b/handouts/programming.pdf useful link for UDF’s
Tutorials with a Focus on Heat Transfer Applications
Using Solar Load Model for Indoor Ventilation
Solving a Conjugate Heat Transfer Problem with FLUENT
Tutorials with a Focus on Fuel Cell Applications
SOFC Model
Modeling a Single-Channel, Counter-Flow Polymer Electrolyte Membrane (PEM) Fuel Cell
Tutorials with a Focus on Rotating Machinery Applications
Solving Transonic Flow over a Turbine Blade with Turbo-Specific Non-Reflecting Boundary Conditions (NRBCs)
Vane Pump Modeling in FLUENT
CFD FLUENT Research Tutorial on transient Couette flow over a grooved surface
Do the prescribed tutorials mentioned above. Even the structures based tutorials. It is very important for the user to be proficient with the geometry modeler and meshing program in Ansys. These two programs are used for building the model and the mesh used in the analysis, and there is no room for error.
Spend at least two to three days, if not a full week, on learning the Ansys 13 program and finishing all of the tutorials. Afterwards, begin research project.
Introduction:
In the edevauer of creating a 3D simulation of the butterfly in the CFD solver FLUENT much was learned such as the following: Flate plate boundary layer, simulations, Steady flow past a cylinder simulations,
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