The discussion centers on the phenomenon of flags appearing to move in slow motion when fluttering in the wind, despite the presence of strong and variable winds. Participants explore the interplay of psychological perception and physical principles, particularly focusing on fluid dynamics and fabric dynamics. The concept of a "Kármán vortex street" is introduced as a key factor in understanding this motion, where alternating vortices influence the flag's behavior. This analysis aims to bridge everyday observations with fundamental physics concepts.
PREREQUISITESPhysics enthusiasts, fluid dynamics researchers, and anyone interested in the intersection of perception and physical phenomena will benefit from this discussion.
I’m trying to build up my understanding of physics concepts by asking questions that emerge from everyday observations. I tried looking up 'flag motion fluid dynamics', but most of what I found was overly technical. That’s why I thought this forum might help me connect intuition with actual physics.Chestermiller said:
As the wind passes a flag pole, it deviates alternately to the left and right, forming a "Karman street". The flag lies between the air that moves down one side of the pole, and the air on the other. It therefore shows the position of the boundary between the alternating vortices, as they move downstream with the wind.metehansure said:
Thank you so much for your clear and detailed explanation.Baluncore said:
Such is life / Physics.metehansure said:
