9 papers
Observability of Finite-Depth Double-Diffusive Exchange from Sparse Temperature-Salinity Measurements
Sriram P. Kalathoor
Double-diffusive interfaces can support exchange histories that are spatially organized but only sparsely observed. A resolved three-dimensional calculation contains the route by w…
Route survival and spectral modification of finite-depth salt-finger plume forests under imposed mean shear
Sriram P. Kalathoor
Salt-finger plume forests in a finite layer can differ in strength and in the route by which interfacial activity becomes vertically connected. We use direct three-dimensional simu…
Interfacial Spectral Memory as a State Variable for Finite-Depth Salt-Finger Exchange
Sriram P. Kalathoor
Thermohaline interfaces in the ocean are often treated through local double-diffusive favorability, yet finite interfaces can also inherit roughness from prior waves, stirring, int…
Interfacial Roughness Spectra and Finite-Depth Salt-Finger Mixing at a Two-Layer Thermohaline Interface
Sriram P. Kalathoor
Salt fingering drives diapycnal scalar exchange across thermohaline interfaces that are statically stable but double-diffusively unstable. Oceanic interfaces are finite-depth struc…
Receptivity and Biorthogonal Decomposition in a Reacting Temporal Mixing Layer
Sriram P. Kalathoor, Joseph C. Oefelein
We examine receptivity and biorthogonal decomposition in a reacting temporal mixing layer using direct and adjoint eigenmodes of a finite-thickness compressible linearized operator…
Planar Lagrangian transport and scalar-gradient organization in a turbulent reacting shear layer
Sriram P. Kalathoor, Joseph C. Oefelein
We analyze planar Lagrangian transport and scalar-gradient organization in a supersonic, reacting hydrogen-air temporal mixing layer using time-resolved mid-plane data from a three…
Event-level compression--chemistry coupling in a supersonic reacting temporal mixing layer
Sriram P. Kalathoor, Joseph C. Oefelein
Compression and heat release interact intermittently in high-speed reacting shear layers, and whole-field averages can obscure their coupling. We examine this coupling in a superso…
Near-Field Combustion-Noise Source Dynamics in a Reacting Supersonic Temporal Mixing Layer
Sriram P. Kalathoor, Joseph C. Oefelein
Compressibility and chemical reactions in reacting flows provide source mechanisms for pressure fluctuations whose signatures depend on the flow, source distribution, and acoustic…
Filtering effects on entropy transport and entropy-production structure in a supersonic reacting shear layer
Sriram P. Kalathoor, Joseph C. Oefelein
Spatial filtering is examined in time-resolved mid-plane DNS fields of a supersonic reacting shear layer using a sequence of box filters. The analysis tracks a nondimensional entro…