Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The trends of velocity along the horizontal axis 〈Vx(t)〉 for the experiments A ∈{0.1; 10; 100} in a time interval of 10 s. The red line reproduces the trend of the periodic pressure wave at f = 0.1 Hz detected for A ∈{10; 100}. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
