The document discusses CFD simulations performed to analyze flow through an Invelox wind funnel from different directions. Key findings include: 1. Flow from the +x direction achieved a maximum velocity of 12.4 m/s and flow rate of 29.4 m^3/s through the funnel. 2. Rotating the funnel 45 degrees increased the maximum velocity to 13.9 m/s and flow rate to 36.4 m^3/s. 3. Flow from the +/-z direction had a maximum velocity of 10.2 m/s and flow rate of 23.49 m^3/s through the funnel.

1. INVELOX OPTIMIZATION
Invelox Tower CFD Test - Flow From Different Directions
Instructor : Professor Yiannis Andreopoulos
Student : M.E. Mehmet Bariskan

2. HOW IT WORKS ?
• Capture, accelerate, concentrate. The name INVELOX comes from this
dedication to INcreasing the VELOcity of wind. What the technology
produces-energy is affordable, abundant, safe, and clean.
• INVELOX, by contrast, funnels wind energy to ground –base generators. Wind
is captured with a funnel and directed through a tapering passageway that
naturally accelerates its flow. This stream of kinetic energy then drives a
generator that is installed safely and economically at ground level.
• Bringing the airflow from top of the tower to ground level allows for greater
power generation with much smaller turbine blades. It also allows for
networking, allowing multiple towers to direct energy to the same generator.

3. INVELOX WIND DELIVERY
• Way To Work • Model

4. COMPARISON OF 4 FLOW MODELS
1. From (+x) direction 2. From reverse direction called (-x)

5. COMPARISON OF 4 FLOW MODELS
3.From transverse called (±z) direction 4. Rotated 45 degrees from YX Plane

6. DESIGN PARAMETERS
• Detailed Dimensions And Geometry • Computational Domains (ANSYS)

7. MESHING (ANSYS)
Medium Mesh 1.9 M Elements
443039 Nodes
Settings
Medium/Inflation to Invelox
Fine Mesh 3.4 M Elements
801317 Nodes

8. MORE MESHING
*To Nozzle Area Applied
*Face Sizing (0.05 m)
*1,196,608 Nodes
* 4.8 M Elements

9. MESHING (ANSYS)
Nodes 1,196,008 Mesh 4.8 m
Invelox
Detailed at Nozzle
4.8 m (Fine Mesh with Face Sizing 0.05m)
1.9 m (Medium Mesh )
Nodes 443039 Mesh 1.9 m
Invelox

10. BOUNDARY CONDITIONS
• Inlet = 6.7056 m/s
• Outlet = 0 (Gauge Pressure)
• Invelox = Roughness Constant 0.5
• %5 Turbulance Intensity/ 0.01m
Length
• Wall = No Slip
• Ref. Value = Inlet

11. PROBLEM SET-UP & SOLUTION
• General = Steady
• Model = Viscous –Standard k-e
• Standard Wall Function
• Material = Air
• Boundary C = Described above
• Reference Values = Inlet (6.7056 m/s)
• Scheme = Coupled
• Gradient = Least Squares Cell Based
• Pressure = Second Order
• Momentum = Second Order Upwind
• Turbulent K. E = Second Order Upwind
• Turbulent Dis. Rate = Second Order Upwind
• Monitors = Residuals / Cd / Cl
• Initialization = Hybrid Initialization
• Run Calculation = 400 Iteration (Monitor till
Converge)

12. PRESSURE CONTOUR AT MIDDLE PLANE (+X)
Fins Flow Direction
• -77 Pa Max. Static Pressure at Nozzle
Rotated Fin 45degree
• -97 Pa Static Pressure at Nozzle

13. VELOCITY CONTOUR AT MIDDLE PLANE(+X)
Fins With Flow Direction
• 12.4 m/s max Velocity at Nozzle
Rotated Fin 45 Degree
• 13.1 m/s max Velocity at Nozzle

14. VELOCITY CONTOUR TOP VIEW Y=3 M (+X)

15. VELOCITY CONTOUR BOTTOM VIEW Y=0 M (+X)

16. VELOCITY CONTOUR TOP VIEW Y=(-)12 M (+X)

17. VELOCITY/PRESSURE CONTOUR TWO PLANE (+X)

18. VELOCITY VECTOR & TURBULENCE
ENERGY XY PLANE (+X)

19. PRESSURE CONTOUR (BACK) FLOW (-X)
• -26 Pa Static Pressure at Nozzle

20. VELOCITY CONTOUR (–) X FLOW
• 9.8 m/s Velocity at Nozzle

21. VELOCITY CONTOUR TOP VIEW Y=3 M (-X)

22. VELOCITY CONTOUR BOTTOM VIEW Y=0 M (-X)

23. VELOCITY VECTOR (-X FLOW)

24. PRESSURE CONTOUR (+/-) Z FLOW
• -37 Pa Static Pressure at Nozzle

25. VELOCITY CONTOUR (+/-) Z FLOW
• 10.2 m/s Velocity at Nozzle

26. VELOCITY CONTOUR Y=3M (+/-) Z FLOW

27. VELOCITY CONTOUR Y=-12M (+/-) Z FLOW

28. STREAM LINES 3D (+/-) Z FLOW

29. PRESSURE CONTOUR 45 DEG. FLOW
• -104 Max Pa Static Pressure at Nozzle

30. VELOCITY CONTOUR 45 DEG. FLOW
• 13.9 m/s

31. STREAM LINES 3D 45 DEG. FLOW

32. COMPARISON OF VELOCITY AND FLOW
MODEL (ANSYS) MESH SIZE VENTURI VELOCITY (M/S) FLOW (M^3/S) FLOW (KG/S)
AVERAGE MAXIMUM Q = A*V2.6250
(+) X FLOW MEDIUM 11.2 12.4 29.4 35.86
( - ) X FLOW MEDIUM 9.03 10.81 25.75 31.41
(+-) Z MEDIUM 8.95 10.29 23.49 28.66
(45 deg) FLOW MEDIUM 13.9 13.9 36.40 44.41

33. REFERENCES
• Prof.Y. Andreapolos, Dr. Daryoush Allaei Invelox “ A New Concept In Wind Energy Harvesting”
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