Maybe we can do our own 'simulated'
modelling of the subject.
Of course there will be many factors left out, like salinity, water temp, etc....
But one can do a TIME-vs-SPEED chart for coasting to a stop, at various depths.
Do an excel chart and from there make a formula, and then see how it compares to, say, aircraft drag formulas.
The ship formula should not be much different from the aircraft one, as it's all about Friction and Fluid Dynamics..
Have fun..
