I Does a humam body movement generate a vacumm trail? and more

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Human body movement does not generate a vacuum trail in the way described, as the concept relates more to aerodynamic drag. When a body part moves, it creates a higher pressure area in front and a lower pressure area behind, but the pressures involved are significantly lower than 78 megapascal, which exceeds atmospheric pressure. The discussion highlights a misunderstanding of how air pressure and drag work in relation to movement. The calculations proposed are impractical given the unrealistic pressure target. Overall, the mechanics of movement and air displacement do not support the idea of creating a vacuum trail with such high pressures.
Gabriel Ulisses
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I will start with an excuse, sorry english is not my main lengauge and i don't practice grammar that much, it is my first time in these forums so be kind, i hope i posted on the right forum thank you for the comprehension.
When you move your arm for example do you generate a trail of vacuum behind it? and does the air ocupating the vacuum space generate force?
I got as especific is i could get if you need anymore values for the calculations ask,i can give preety much anything.
How would you calculate:
What would be the nescessary velocity for a 60cm³ random body part of you (volume) to generate enough vacuum so the air ocupating it space would generate 78 megapascal of pressure on a circle of 3 meter radius?
 
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Welcome to PF!

What I think you are referring to is aerodynamic drag. There is a higher pressure area in front of you and a lower pressure area behind. But 78 megapascal? Atmospheric pressure is only 0.1 megapascals, so no...
 
russ_watters said:
Welcome to PF!

What I think you are referring to is aerodynamic drag. There is a higher pressure area in front of you and a lower pressure area behind. But 78 megapascal? Atmospheric pressure is only 0.1 megapascals, so no...
I was expecting an absurd number, something actually inhumanly posible, and yes i think aerodynamic drag is watch I'm refeering to, it is the air ocupating the vacuum created by movement right?
 

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