Fire Path Simulation

Hello everyone,

I’m trying to simulate that i have some fuel at the floor (like dropped from a barrel or something) and with a phosphor ignite the fuel and starting the flames from one point to another (like a path).
In the end of the path, i would like to ignite a cube (for example), like it was covered with fuel too.

In need your help to understand how can i do this simulation with the fire going throw a path.