  Starting with an integral formulation of mass flow rate through an ensemble
of isotherms constituting a statistically planar, turbulent premixed flame, a
scaling for the corresponding turbulent flame speed is derived without invoking
Damk{\"o}hler's hypotheses. Major approximations and interim results are
validated using a large Karlovitz number, unity Lewis number, Direct Numerical
Simulation (DNS) dataset of n-heptane/air mixture, computed with reduced
chemistry. A new length scale quantifying the fluctuation distance of the
isotherms within the premixed flame structure is introduced.
