Abstract
<strong class="journal-contentHeaderColor">Abstract.</strong> The turbulent kinetic energy dissipation rate is one of the most important quantities characterizing turbulence. Experimental studies of a turbulent flow in terms of the energy dissipation rate often rely on one-dimensional measurements of the flow velocity fluctuations in time. In this work, we first use Direct Numerical Simulation (DNS) of Stationary Homogeneous Isotropic (SHI) turbulence at Taylor-scale Reynolds numbers 74 <span class="ILfuVd" lang="de"><span class="hgKElc">≤ <strong>R</strong><sub>λ</sub></span></span> <span class="ILfuVd" lang="de"><span class="hgKElc">≤ </span></span>321 to evaluate different methods for inferring the energy dissipation rate from one-dimensional velocity time records. We systematically investigate the influence of the finite turbulence intensity and the misalignment between the mean flow direction and the measurement probe, and derive analytical expressions for the errors associated with these parameters. We further investigate how statistical averaging for different time windows affects the results as a function of <span class="ILfuVd" lang="de"><span class="hgKElc"><strong>R</strong><sub>λ</sub></span></span>. The results are then combined with Max Planck Variable Density Turbulence Tunnel (VDTT) hot-wire measurements at 147 <span class="ILfuVd" lang="de"><span class="hgKElc">≤ <strong>R</strong><sub>λ</sub></span></span> <span class="ILfuVd" lang="de"><span class="hgKElc">≤ </span></span>5864 to investigate flow conditions similar to those in the atmospheric boundary layer.
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