Dependence of the thread length with the wave energy flux. Panel (a): Thread length, a, as a function of the injected wave energy flux, ⟨π⟩, for different values of central temperature. Panel (b): Percentage increase of the thread length with respect to the value without wave heating as a function of ⟨π⟩ for the same central temperatures. The vertical lines in panel (b) denote the value of ⟨π⟩_max. corresponding to each temperature.