propagating flame speed in paraview
 

Hi
I have been using Paraview for 5-6 months to post-process my OpenFOAM cases. But still, I need help figuring out how to calculate the propagating flame tip speed. Until now, I have been doing this manually by creating an iso-surface, but the cases have gotten more complex, so I would need the software to give me the distance traveled by the flame with time. This might be an easy thing to do, but I couldn't find any discussion forum regarding it also.
So, my problem is that a flame is ignited at one end in a closed tube filled with premixed mixture and I wish to calculate the flame tip propagating speed in Paraview. Any help would be appreciated.
Thanks in advance.