I would like to ask how energy changes forms in a flow.

I understand the concept of stagnation pressure, static and dynamic. I was wondering how energy changes form from static to dynamic.

What physical phenomena maintain the total energy of the system but convert static pressure to dynamic pressure, or visa versa?

Now, what phenomena increase the stagnation pressure by virtue of increasing static or dynamic pressure whilst holding the other constant.
For example, to what extent does the static and dynamic pressure increase? In the ideal world does the dynamic pressure increase with the static remaining constant?