Hello,

A new water animation. The settings are very close to my previous post : a
cup of wood that fall in a tank of water. I changed the length of the tank
in order to avoid the cup to touch the border of the tank.

The video is xvid encoded.

Any comment is wellcome.

Regards,
Fidos.

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Attachments:
Download 'cup2.avi.dat' (676 KB)

very nice. I always play it looped for a while, because there is always so
much to see in your animations. the swirl in the fluid, at the etch of the
object are very nice.

just a few notes:
-it's difficult to see, but it looks like the cup still ends up spinning
faster and faster. do you simulate friction between the object and the
water surface?
-it looks like either the density of the wood is very low (more like cork)
or the density of the fluid is very high. (more than water). this results
in that the speed of the object is affected mostly by all the waves tossing
it around, since it's own mass and inertia is very small. and the cup does
ot sink into the water very far at the end of the animation. are you using
realistic densities for your simulations?

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Every time I see one of these I go: How does he DO that!?
And since you've varied the idea so many times, I've have ruled out luck...
;)

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"Jaap" <jws### [at] yahoocom> wrote:
> very nice. I always play it looped for a while, because there is always so
> much to see in your animations. the swirl in the fluid, at the etch of the
> object are very nice.
Thank you.
>
> just a few notes:
> -it's difficult to see, but it looks like the cup still ends up spinning
> faster and faster. do you simulate friction between the object and the
> water surface?
No, for the moment no friction exist. The speed rotation is constant at the
end.

> -it looks like either the density of the wood is very low (more like cork)
> or the density of the fluid is very high. (more than water). this results
> in that the speed of the object is affected mostly by all the waves tossing
> it around, since it's own mass and inertia is very small. and the cup does
> ot sink into the water very far at the end of the animation. are you using
> realistic densities for your simulations?
I use a density of 1.0 for the water and 0.20 for the object. It's perhaps
too low for the wood.

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> I use a density of 1.0 for the water and 0.20 for the object. It's perhaps
> too low for the wood.

(just the first google result:)
http://www.simetric.co.uk/si_wood.htm

the lowest one i know of is Balsa, and even that is 0.17

Also interesting: the highest one in the list is 1.375 I knew there where
some woods that didn't float, but 1.375 will sink like a brick.

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Jaap wrote:
> Also interesting: the highest one in the list is 1.375 I knew there where
> some woods that didn't float, but 1.375 will sink like a brick.

Not Quite ;) Brick, common red:	1.922


-- 
~Mike

Things! Billions of them!

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"Jaap" <jws### [at] yahoocom> wrote:
> > I use a density of 1.0 for the water and 0.20 for the object. It's perhaps
> > too low for the wood.
>
> (just the first google result:)
> http://www.simetric.co.uk/si_wood.htm
>
> the lowest one i know of is Balsa, and even that is 0.17
>
> Also interesting: the highest one in the list is 1.375 I knew there where
> some woods that didn't float, but 1.375 will sink like a brick.

Thank you for the link. 0.2 is not enough. I will try 0.5 next time.

Regards,
Fidos.

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"fidos" <fid### [at] wanadoofr> wrote:
> Thank you for the link. 0.2 is not enough. I will try 0.5 next time.

Watch out for the splash :-)

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Looks more like syrup than water... but still cool to watch!

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