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- Phoenix Smoke usually goes from 0-1; The Phoenix Source won't stop you from emitting Smoke above 1 and it would look thicker in rendering, but you could also do the same using the Volumetric options.
- Fuel goes from 0-1; Fuel above 1 would not be able to ignite - check the Fuel rollout info.
- Temperature is in Kelvins, so it often goes from 300-2000, or up to a few thousand; If you simulate cold smoke, it can drop below 300, but never below 0.
- Speed is in Voxels/sec, so it depends on the grid size and resolution, but usually goes from 0 to several hundred. Note that Velocity is a vector, while Speed is just a scalar number. Velocity has direction and length, while Speed is just the length with no direction.
Data from simulators in other software often differs a lot from Phoenix ranges. If you are importing a foreign cache file, you can find out the grid channel ranges under the Simulation rollout, in the Cache File Content box.
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The numbers after the channel name are the minimum and maximum value of that channel in the grid for the current timeline frame. The ranges can change as you scroll the timeline as the temperature in a cache file rises, smoke dissipates, speed changes, etc., so keep in mind that the data range for one frame might not be representative for the entire cache sequence.
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