7.6.2.23.2. Temperature

Syntax: Burn Initiation [{of} SpeciesName] = Temperature (Tign = Tign | [Min_Ignition_Spacing = min_ignition_spacing] | [Hard_Start_Ignition = hard_start_ignition])
Scope: Aria Material
Summary: Thermally activated burn front. If min_ignition_spacing is provided then multiple burn initiations are supported, otherwise only one initiation per block is supported. Pick a minimum ignition spacing ( $d$ ) that is several times larger than your interface width ( $d > 3w$ ), and that provides $Da >> 10$ , where $Da = \frac{v_{b} d}{\alpha}$ ( $\alpha$ = thermal diffusivity and $v_{b}$ = burn speed) By default, the level set is shifted back by $w/2$ on ignition so the burn starts smoothly. To disable this and use a hard start (no shifting of burn front) set hard_start_ignition=1. Burn initiation is used to specify where the burn front occurs, while burn ignition commands specify when to enable burn fronts. If no burn ignition is specified, the ignition method is the same as the initiation