On 2025-05-22 23:18 (-4), Cousin Ricky wrote:
>
>  - There is *always* a column of bubbles along the y-axis.
>  - As Kenneth noted years ago, the bubble size arguments, to put it
>    mildly, are non-intuitive, and I have yet to figure out how they
>    work.  I also question whether bubbles expand linearly with
>    decreasing pressure.
> 
> ...  I also won't submit an HTML user manual so long as I
> haven't figured out the bubble size arguments.

I believe I have figured out fBblHeightRngS and fBblHeightRngE, and they
are not at all as Mr. Robertson described.  They appear to be the lower
and upper bounds of the radii of bubbles at the lower end of the
container; the sizes of the bubbles as they rise are determined
automatically.

I have created an HTML user manual, which describes these and the other
macro arguments as best as I could figure them out.  I have also
randomized that one column of bubbles that was fixed to the y-axis.
These updates are in version 2.0.1:

  https://github.com/CousinRicky/POV-bubble/releases/tag/v2.0.1

My next task is to figure out realistically how the bubbles should
expand as they rise.  My intuition tells me it should be a cube root
correspondence, rather than linear; but that it also depends on the
fluid density and atmospheric pressure, which are not currently
variables (that I can see) in the macros.

Post a reply to this message