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Re: Flame velocity in explosion [message #18713 is a reply to message #18637]

Wed, 02 February 2000 00:00

wbiagiot
Messages: 59
Registered: January 1999

Member

Lol, Ok Murray.

Well, I'm not sure what your thought process on this is, but here are
some of my 1st thoughts and not necessarily related to IDL. Your
problem as stated is a calculation of velocity (distance over time, I
believe). You've stated that you have the time data and therefore need
the distance data to complete the equation. Simplistically, one might
assume that the flame starts from a single point in 3d space (XYZ)(spark
from an electrode, ie.). Then, you could apply the old D^2 = deltaX^2 +
deltaY^2 + deltaZ^2 distance formula on each data pt to calculate a
matrix of velocity data. If you want to present some kind of snazzy
visual display, draw all of the velocity vectors on a 2D or 3d plot with
the color set to a value corresponding to speed. Something like:

color_code = ((velocity_n - min_velocity) / (max_velocity -
min_velocity)) * 255

..giving a color code of 0 to 255.

Oh yeah, and set the color table to one of the 40 or so that IDL
supplies. Something like the 3d trackball widget might give some
viewing options, but I have never used it. See the IDL demo to see how
it works.

Well, I sketched that all out on my bagel plate so I'm sure it's at
least 50% incorrect. (The seeds get in the way) Feel free to let me
know that I'm all wet.

-Bill B.

--

"They don't think it be like it is, but it do."

Oscar Gamble, NY Yankees

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[Message index]

		Flame velocity in explosion By: shearerm on Wed, 26 January 2000 00:00
		Re: Flame velocity in explosion By: wbiagiot on Wed, 02 February 2000 00:00
		Re: Flame velocity in explosion By: shearerm on Fri, 28 January 2000 00:00
		Re: Flame velocity in explosion By: wbiagiot on Thu, 27 January 2000 00:00

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