Fluxes across double-diffusive interfaces: a one-dimensional-turbulence study

The parametrization of the fluxes of heat and salt across double-diffusive interfaces is of interest in geophysics, astrophysics, and engineering. The present work is a parametric study of these fluxes using one-dimensional-turbulence (ODT) simulations. Its main distinction is that it considers a parameter space larger than previous studies. Specifically, this work considers the effect on the fluxes of the stability parameter $R_{\rho}$, Rayleigh number $Ra$, Prandtl number, Lewis number, and Richardson number. The ratio $Ra/R_{\rho}$ is found to be a dominant parameter. Here $Ra/R_{\rho}$ can be seen as a ratio of destabilizing and stabilizing effects. Trends predicted by the simulations are in good agreement with previous models and available measurements.