volcano help?

[nano]

hi,

I 'm trying to simulate a volcano heavy smoke ,

I 'm trying to tweak the rocket example,

but the smoke just go straight...

how can it draw a sort of cone???? do i need to use spacewarp? a drag one?


regards

[instinct]

I'd say Pressure Decay does just that. Essentially it will lower the Pressure the higher the smoke is. Also used for nuke like effects as far as i remember.

quote from the help

Pressure decay (MXS: pressdec) - In the real atmosphere the higher we are the lower the pressure is. For small scale simulations the effect is negligible, but for large scale simulations (like nuclear explosion) it plays a very important role. The quantity of this parameter is just a multiplier - value of 1 means a pressure decay as in the real earth atmosphere.

Regards,
Thorsten

[Ivaylo Katev]

yes the pressure decay is added for such reasons. as additional factor the turbulence is important too.

[nano]

thank you both,

I was a bit shy increasing the pressure decay to 0.5 or 1
but a value of 900 gives me good results !!!!

regards

[Paul Oblomov]

I think it is scale dependent. Maybe ur sim cage just small in 3dsmax units

[nano]

yes that's right...about 60x60x60 unit 1unit=20cm....

[Ivaylo Katev]

you can increase the scale, or set some pressure decay multiplier.

[Ivaylo Katev]

i just made a small test