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Recent DNS results [Gerolymos G.A., Vallet I. : J. Fluid Mech. 807 (2016)386--418] have provided data for the terms in the transport equations for thecomponents of the dissipation tensor $\varepsilon_{ij}$ in low-Reynoldsturbulent plane channel flow. The present paper extends the previous results bya detailed analysis of the behaviour of various mechanisms in the$\varepsilon_{ij}$-transport equations (production, diffusion, redistribution,destruction), with particular emphasis on the component-by-component comparisonwith the corresponding mechanisms in the transport equations for theReynolds-stresses $r_{ij}$. The splitting of the pressure terms for thewall-normal components into redistribution and pressure-diffusion revealssubstantially different behaviour near the wall. The wall-asymptotics ofdifferent terms in the transport equations are studied in detail, and examinedusing the DNS data. Both DNS data and wall-asympotic analysis show that theanisotropy of the destruction-of-dissipation tensor$\varepsilon_{\varepsilon_{ij}}$ is fundamentally different from that of$r_{ij}$ or $\varepsilon_{ij}$, never approaching the 2-component (2-C) stateat the solid wall.

Further analysis of the budgets of the dissipation tensor $\varepsilon_{ij}$ in turbulent plane channel flow