Fluid flow visualization
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The document discusses fluid flow visualization techniques, including the use of dyes, pollen grains, and advanced computer graphics software to illustrate flow patterns and phenomena like the Karman vortex tail and the Magnus effect. It highlights the importance of visualizing laminar and turbulent flow in aerodynamics, demonstrating various methods including thermal photography and simulations based on the Navier-Stokes equations. Examples and images of these visualizations are provided to enhance understanding of fluid dynamics in modeling scenarios.
Fluid flow visualization
- 1. FLUID FLOW VISUALIZATION • KARMAN VORTEX TAIL • MAGNUS EFFECT • LIFT AND DRAG ON MODEL AEROPLANE • LAMINAR AND TURBULENT FLOW
- 2. :FLUID FLOW VISUALIZATION : o It is a technique where the flow phenomena are made visible for better understanding. o Use of dyes to visualize flow patterns. o Use of pollen grains for visualization. o Use of special photography techniques o Use of polarised light and color filter photography o Use of thermal photography o Use of computer graphics
- 3. SOFTWARES FOR FLUID FLOW VISUALIZATION o Various softwares are available where computer can simulate fluid flow o These softwares depend on the solution of Navier-Stoke’s equation applied to particular flow situations. o The simulated effect can be viewed as a video clip. o Very simple tricks can also be used for flow visualization as we have seen in the video films by Hunter Rouse. o Following slides show flow visualizations of various phenomena.
- 4. This Computer Graphics visualization shows the important phenomenon of Karman Vortex Trail or Train. Different colors are used to simulate the pressure difference computed by the software
- 5. This is a very old image using freely miscible very light weight fine aluminum powder for visualization of flow pattern
- 7. Image from a modern computer simulation
- 8. Simple food dye used to visualize Laminar, Transitory and Turbulent flow
- 9. Hele-Shaw apparatus for visualization of laminar flow
- 10. Laminar Flow around an aerofoil seen in Hele-Shaw
- 11. Lift of an aeroplane wing and eddies at the tail of the wing
- 12. Simulation of Magnus Effect through Vector Graphic CFD Software