Drag of a Stationary vs Moving Obstacle in Same Medium

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The drag experienced by a stationary obstacle in a current is compared to that of the same obstacle moving through a stationary medium. It is determined that both scenarios can result in the same drag if the dimensions of the current are comparable to those of the stationary medium. The discussion highlights the importance of relative sizes in understanding drag forces. Overall, the relationship between the obstacle's movement and the medium's flow is crucial for analyzing drag. Understanding these dynamics can aid in various applications in fluid mechanics.
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Hi all,

The drag of a stationary obstacle due to incoming current versus the drag of the same obstacle that moves in a stationary (but the same) medium. Will these two result in a same drag?

best regards,
-Arman-
 
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Absolutely, provided that the dimension of the current is as big as the stationary medium.
 

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