Looking at flow with coffee and milk 2 (behind a square rod)
Let's take a look!
What type of experiment is this?
Experimental procedure and explanation:
- Float milk on coffee and observe the flow .
- When you move the square rod, a circulating flow (vortex) is created behind it, and this phenomenon is called "separation". This is the same as with the card (Looking at flow with coffee and milk 1).
- The flow cannot turn sharply. In the case of an object such as a flat plate, the flow bends at a right angle at the end and cannot wrap around behind, creating a vortex.
- The vortices generated by separation (separation vortices) move away from the square rod sequentially.
- The technology to visualize this flow this is called "flow visualization". It is often used in fluid dynamics research and development.
- After the experiment was over, the staff enjoyed the coffee used in this experiment.
|[Caution]||As with the case of the card (Looking at flow with coffee and milk 1), this is a "seemingly turbulent flow", but this experimental video does not demonstrate a "turbulent flow"; rather, this is a "laminar flow". You can see that the milk line remains clearly.|
|[Keywords]||Flaking, flow visualization|
|[Related items]||Looking at flow with coffee and milk 1, Looking at flow with coffee and milk 3|
“Illustrated Fluid Dynamics Trivia,” by Ryozo Ishiwata, Natsume Publishing, P68-69.