arXiv subjects

Adam W DeMarco

Publications and source records attributed to Adam W DeMarco.

2 recordsLinked to original sources

arXiv2020

On the Dissipation Rate of Temperature Fluctuations in Stably Stratified Flows

In this study, we explore several integral and outer length scales of turbulence which can be formulated by using the dissipation of temperature fluctuations ($\chi$) and other relevant variables. Our analyses directly lead to simple yet non-trivial parameterizations for both $\chi$ and the structure parameter of temperature ($C_T^2$). For our purposes, we make use of high-fidelity data from direct numerical simulations of stratified channel flows.

physics.ao-ph↗

arXiv2020

Parameterizing the Energy Dissipation Rate in Stably Stratified Flows

We use a database of direct numerical simulations to evaluate parametrizations for energy dissipation rate in stably stratified flows. We show that shear-based formulations are more appropriate for stable boundary layers than commonly used buoyancy-based formulations. As part of the derivations, we explore several length scales of turbulence and investigate their dependence on local stability.

physics.ao-ph↗