– The Minimum Temperature Ignition is the lowest temperature at which a combustible substance (when heated) takes fire in air and continues to burn (Temperature of Ignition).
– Maximum temperature is the highest temperature a flame can reach (for a given combustible).
– If you know these two parameters for a specific substance Blender let you set them in this tab.
– The values are expressed in Kelvin/1000
– Converting Celsius (°C) To Kelvin (K) is easy: T(K) = T(°C) + 273,15
– In this example I rendered the flames produced by two different substances: Butane (Temperature Ignition: 678,15K ; Maximum temperature: 2243K) and Oxyhydrogen (Temperature Ignition: 843,15K ; Maximum temperature: 3073,15K)
– You have to divide all values by 1000 so that the value you have to insert are:
– Butane: Temperature Ignition: 0.67815 ; Maximum: 2,243
– Oxyhydrogen: Temperature Ignition: 0.84315 ; Maximum: 3,07315
– Remember: in these videos I only want to explain what these parameters mean, these simulations does not pretend to be ‘realistic’. First of all I usually set a reduced Time Scale so that you can appreciate better the evolution of the system, and second I focalize on a specific parameter while a good simulation needs to adjust lot of parameters, materials, lights etc…
– First example, Butane and Oxyhydrogen:
– Does these two parameters make sense if you are rendering a flame without using specific values for specific substances? Blender let you use, and not only in fire simulation, values that lead to not realistic phisical simulations, and I think this makes Blender incredible as it let your fantasy unwind and create!
– Second example changing only the Temperature Minimum (Temperature of Ignition):
– Third example changing only the Temperature Maximum: