Turbulent/turbulent interfacial layers of a shearless turbulence mixing layer in temporally evolving grid turbulence
K. Nakamura, T. Watanabe, and K. Nagata Turbulent/turbulent interfacial layers of a shearless turbulence mixing layer in temporally evolving grid turbulence Physics of Fluids, 35 045117 2023 This article may be found at https://doi.org/10.1063/5.0141253 . The PDF is also available here . This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. Abstract Turbulent/turbulent interfacial (TTI) layers are investigated with direct numerical simulation of temporally evolving grid turbulence. The present study considers a temporally evolving wake of two parallel-bar grids with different mesh sizes, which generate homogeneous isotropic turbulent regions with large and small turbulent kinetic energies (TKE). A shearless mixing layer of turbulence forms between the large- and small-TKE regions. The TTI layer bounded by the large- or small-TKE region is identified with a passive scalar field, and the flow statistics are eva