Vortex shedding occurs due to the detachment of flow. The typical example is for the oscillating wake behind a cylinder, and has a frequency related to the size of the object.
I want to know, if a long object such as a submarine/train is travelling through a fluid, will (small) detachment of the flow at the front of the object cause vortices to to exist and travel along the body before detaching again at the end of the object?
i.e. whether these vortices have fixed frequency relative to the geometry, to distinguish them from general boundary layer turbulence.
I have performed a literature search, and cannot find the answer to this question. Only the repeated comment that "turbulent behaviour at larger scales is a strong function of the flow geometry and gross flow parameters"$^1$. I have also looked at the question of "wall-pressure fluctuations over a forward facing step"$^2$, but the results are typically presented in terms of coherence and frequency domain cross correlation (e.g. Corcos model$^3$) and don't answer my time-dependent question.
Furthermore, this$^4$ paper shows performs a numerical simulation which would seem to show that the answer is yes, however the relationship between the shedding frequency in this type of geometry is unclear to me.
Bruneau, Charles-Henri, Patrick Gilliéron, and Iraj Mortazavi. "Passive control around the two-dimensional square back Ahmed body using porous devices." Journal of Fluids Engineering 130.6 (2008): 061101.