Question

我想用SPH微粒模拟火灾。我理解SPH背后的概念,但却不理解如何将火 model作为 flu。

Do I have to add some temperature property to my particles from which I can derive there color?
Do I have to take the surrounding air particles in account to create some buoyancy effect?
Where do the particles get their heat from? Do I have to add a heat emitter over some space which creates warm particles so that the temperature then diffuses to the other particles over time?
Are there some tutorials which describe my problem?

Answer 1

Yes, you ll have to have a temperature property. It really isn t fire if temperature isn t involved. And once you have temperature it s easy to get luminosity and color. (You probably don t have to worry about radiative heat transfer, at least not for a first effort.)
If you handle pressure and gravity right, buoyancy will arise (ahem) naturally.
You can start with a fixed heating element and an inert gas, then when you re ready you can introduce combustion as a differential equation: the rate of energy generation is a function of temperature, fuel pressure and oxygen pressure.