Kármán–Howarth equation
In isotropic turbulence the Kármán–Howarth equation ( after Theodore von Kármán and Leslie Howarth 1938 ) , which is derived from the Navier–Stokes equations , is used to describe the evolution of non-dimensional longitudinal autocorrelation . 
<triplet> Kármán–Howarth equation <subj> Theodore von Kármán <obj> named after <subj> Leslie Howarth <obj> named after