Step into the Future with Autodesk® Simulation CFD 2013 Derrek Cooper – A utodesk MA4357-L-P This hands-on lab is an opportunity to test drive the latest computational fluid dynamics (CFD) simulation product scheduled for release next year. The CFD team has made huge strides in meshing and solver performance. Take the opportunity to sit w ith the team and provide candid feedback of w hat is coming. Autodesk Simulation CFD w as formerly know n as CFdesign®. Learning Objectives A t the end of this class, you will be able to: Launch, setup, and review a CFD simulation directly f rom A utodesk Inventor Fusion Create a CFD design study in Simulation CFD 2013 Make a design change in Fusion and update the design study Compare the perf ormance of two different designs using the Decision Center Provide inf ormed f eedback to the CFD team to help drive development About the Speaker Derrek is currently the product manager for the CFD product line at A utodesk. He is obsessed with helping companies maximize their potential and minimize risk by adopting simulation and making it an organic part of their product development process. The obsession started in the beginning w hile earning a master ’ s in mechanical engineering at Temple University. His research was focused on CFD and the correlation of physical and digital prototyping. Derrek has been exposed to numerous CAE technologies over the years and has his pulse on industry trends from a customer’ s perspective. Prior to joining A utodesk, he led the product management team f or the CFdesign f amily of products. [email protected]
Transcript
Step into the Future with Autodesk® Simulation CFD
2013 Derrek Cooper – Autodesk
MA4357-L-P This hands-on lab is an opportunity to test drive the latest computational fluid dynamics (CFD)
simulation product scheduled for release next year. The CFD team has made huge strides in meshing and solver
performance. Take the opportunity to sit w ith the team and provide candid feedback of what is coming. Autodesk
Simulation CFD was formerly known as CFdesign®.
Learning Objectives At the end of this class, you will be able to:
Launch, setup, and review a CFD simulation directly f rom Autodesk Inventor Fusion
Create a CFD design study in Simulation CFD 2013
Make a design change in Fusion and update the design study
Compare the performance of two different designs using the Decision Center
Provide informed feedback to the CFD team to help drive development
About the Speaker
Derrek is currently the product manager for the CFD product line at Autodesk. He is obsessed with
helping companies maximize their potential and minimize risk by adopting simulation and making it an
organic part of their product development process. The obsession started in the beginning w hile earning
a master’s in mechanical engineering at Temple University. His research was focused on CFD and the
correlation of physical and digital prototyping. Derrek has been exposed to numerous CAE technologies
over the years and has his pulse on industry trends from a customer’s perspective. Prior to joining
Autodesk, he led the product management team for the CFdesign family of products. [email protected]
Step into the Future with Autodesk® Simulation CFD 2013
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Open the Model
Design Objective Understand the fluid flow characteristics and pressure drop of a ball valve assembly.
The application: Airflow in a pressure relief valve
Inlet Flow Rate = 25 m 3/h
Outlet = 0 Pa (atmospheric)
Open the Valve Assembly in Inventor Fusion
1. Launch Inventor Fusion 2013 2. Open AU-CFD-valve.dwg
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Launch the valve model into Simulation CFD .
3. Click Autodesk Simulation CFD
4. Click Launch
If the Geometry Tools dialog appears, close it.
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Set up the Simulation Model
Verify and apply Material Properties and Boundary Conditions
5. Verify that the Materials were automatically assigned by the pre-defined Rules.
6. Click Boundary Conditions in Setup Tasks
7. Select Inlet Surface
8. Click Edit in Boundary Conditions
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9. Define the Inlet Boundary Condition
Type = Volume Flow Rate Units = m 3/h
Volume Flow Rate = 25
Check Fully Developed
Click Apply
10. Create a Summary item on the Inlet surface
Right-click on the “surface” under Volume Flow Rate
Click Create summary item
11. Select Outlet Surface
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12. Click Edit in Boundary Conditions
13. Define the outlet boundary condition
Type = Pressure
Units = Pa
Pressure = 0 Click Apply
Run the Simulation 14. Click Solve in Simulation
15. Click Solve to start the calculation:
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16. The model should look like this:
Note: You can interact with the model and view the results while the solver is running. The Convergence Plot provides a sense of how the solution is progressing. A typical first-run simulation should take a few minutes and run about 100 iterations.
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Review Results of the CFD Simulation
Change the Global Results and displayed units
17. To change the display of the model to shaded, expand the Visual Style menu, and click
Shaded:
18. Click Global from Results tasks.
19. Change Global Result from Velocity Magnitude to Static Pressure
20. The model should look like this:
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21. Right-click on the Static Pressure legend and change the units to bar
This provides a view of the overall f luid pressure drop through the valve.
Create a cut plane to view the flow inside the valve
22. Click Planes in Results Tasks
23. To create a plane, click Add in Planes.
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24. Display velocity and show vectors:
a. Change Result from Static Pressure to Velocity Magnitude.
b. Change Vector from None to Velocity Vector.
25. Navigate the model manually or w ith the Cube (click the “Right” face) so that the model
appears in this orientation:
26. Click Summary Image in Image
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Create the Second Design Iteration
Clone the design
27. Right-click on Design 1 in the Design Study Bar, and click Clone…
28. Name the Design Design 2.
Update the geometric model: Return to Fusion and modify the Ball part…
29. Hide the housing part click the “light bulb” icon in the Browser
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30. Click Press/Pull in Solid
31. Select the ball part in the model w indow
32. Enter -0.001m as the Offset, and press Enter on the keyboard.
33. Click OK
34. Click Done
35. Click Autodesk Simulation CFD
We are now going to update the design clone…
36. Select Design 2 from the Design Study List, and click Update design.
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Run the Second Design Iteration Simulation
37. Click Solve in Simulation
38. Change Continue From to 0
39. Click Solve
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Compare Results in the Decision Center
Leverage a saved view to create another Dynamic Image
40. From the View tab, click Apply View in View Settings
41. Browse to the working directory select AU-view.xvs, and click Open
The view should look like this:.
42. From the Results tab, click Summary Image in Image
(We w ill use this image soon to compare results from the two design iterations…)
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Compare the pressure drop of the two design iterations using the Decision Center
43. From the Setup tab, click Decision Center in Design Study Tools
44. Right-click on Decision Center in the tree, and click Update all
45. In the Output bar, change the Units of Pressure to bar, and enter 0.24 as the Reference.
46. Check the Plot box, and click Plot (button on the right of the Critical Values table)
Compare the results visually using the Summary Image
47. Click Image 1 in the Decision Center
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Navigate the model w ith either the mouse or the navigation cube.
48. From the View tab, click Viewports and select vertical split
49. Select Link Views
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50. To compare the two design iterations side by side, drag the thumbnail from the second
design into the other viewport:
51. Click Image 2 from the Decision Center, and drag the thumbnail into the second
