Asymmetrical Order in Wall-Bounded Turbulent Flows

TL;DR

This paper uncovers asymmetrical order in the dissipation structures of wall-bounded turbulent flows, revealing how these structures unify scaling and transport dynamics despite boundary condition differences.

Contribution

It introduces the concept of asymmetrical order in dissipation structures to unify turbulence scaling and transport in wall-bounded flows.

Findings

Asymmetrical order exists in dissipation structures.

Self-similarity in dissipation structures is established.

Differences in boundary conditions affect turbulence structures far from the wall.

Abstract

Scaling of turbulent wall-bounded flows is revealed in the gradient structures, for each of the Reynolds stress components. Within the dissipation structure, an asymmetrical order exists, that we can deploy to unify the scaling and transport dynamics within and across these flows. There are subtle differences in the outer boundary conditions between channel and flat-plate boundary-layer flows, which modify the turbulence structure far from the wall. The self-similarity exhibited in the dissipation structures and corresponding transport dynamics establish capabilities and encompassing knowledge of wall-bounded turbulent flows.