[Paddlewise] Wave dynamics - high bracing & rotational energy?

G'Day,
        In reply to Peter Treby's question. I'm assuming the energy in a 
wave can be broken into three components: -

i) potential energy due to the height of the wave and this is what is given 
in the formulae I posted

ii) kinetic energy due to horizontal movement of the water and this is zero 
because there should be no net horizontal movement in a deep water wave 
(reference Richards post snipped below)ie its the energy which is moving not 
the water!

iii) Rotational energy and I've ignored this as I don't have any feel for 
what can be observed in order to make an estimate - does this rotation only 
occur in breaking waves for example? You can certainly feel it when in a 
high brace in surf. Can it be felt in a high brace into deep water, non 
breaking (sinusoidal), sea waves? Any way I've ignored the rotational term 
so my formulae is probably an underestimate of the total energy! Guess its 
time to go out and high brace into some swell - which I've never done 
before!

All the best, PeterO

Peter Treby wrote
>Does this formula have no variable for the wave speed, or is that taken 
>into account by wave height, trough distance and other variables?

Peter Osman wrote
>So it should have read (0.36*p*g*h*(V^2))/PI. Where p is sea water
>density, g is acceleration due to gravity, h is the horizontal peak
>to trough distance and V is the vertical peak to trough distance.

>Richard wrote;
>They don't travel.  It's an up and down rotating motion.  A molecule of 
>water is not displaced horizontally to any great extent.



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