I just watched “Downsizing”. They have this method of shrinking people down to sizes of around 5 inches.
Now, suppose you downsize a person of say, 5 feet to 5 inches, which turns out to be about (1/12) times his original height. Then, the Reynolds number for such a person would also be 12 times smaller. This much I understand.
What I don’t understand and really want to know is, how would such a person “feel” in a medium having a Reynolds number 12 times smaller ?
I believe I understand Reynolds no. to be a helpful mathematical tool in analysing different flow regimes in fluid dynamics. I, however, don’t have a clear understanding of how change in sizes alone affects the perception of the flow around that body ( the “feel”), keeping the density and dynamic viscosity the same.