A von Karman vortex street forms in the wake of a cylinder in shallow channel flow, visualized with a rheoscopic fluid (Pearl Swirl).
Changing the angle of attack of an airfoil changes the attachment of the boundary layer, here visualized by rheoscopic fluid (fish scales) in a water flume.
Aluminum flakes in a pool of silicone oil heated from below displays the Bénard-Marangoni convection instability. The resemblance to the Sun was achieved with post-processing of color.
Aluminum flakes in a pool of silicone oil heated from below displays the Bénard-Marangoni convection instability. Here is a time lapse taken over the period of two minutes.
Bénard-Marangoni convection instability occurs as horizontal layer of silicone oil with aluminum flakes is heated from the bottom with a free surface on top. Variations in temperature cause surface tension gradients that drive the flow.
Flow Vis Guidebook
- Introduction to the Guidebook
- Overview 1: Phenomena. Why Does It Look Like That?
- Overview 2: Visualization Techniques
- Overview 3: Lighting
- Overview 4 - Photography A: Composition and Studio Workflow
- Overview 4 - Photography B: Cameras
- Overview 4 - Photography C: Lenses - Focal Length
- Overview 4 - Photography C: Lenses - Aperture and DOF
- Overview 4: Photography D: Exposure
- Overview 4 - Photography E - Resolution
- Overview 5 - Post-Processing
- Clouds 1: Names
- Clouds 2: Why Are There Clouds? Lift Mechanism 1: Instability
- Clouds 3: Skew - T and Instability
- Clouds 4: Clouds in Unstable Atmosphere
- Clouds 5: Lift Mechanism 2 - Orographics
- Boundary Techniques - Introduction
- Dye Techniques 1 - Do Not Disturb
- Dye Techniques 2 - High Visibility
- Dye Techniques 3 - Light Emitting Fluids
- Photons, Wavelength and Color
- Refractive Index Techniques
- Art and Science
- TOC and Zotpress test