Quantification of the Full Dissipation Tensor from an L-Shaped SPIV Experiment in the Near Wall Region

An experiment was performed in the LML boundary layer facility to determine all of the derivative moments needed to estimate the dissipation. The Reynolds number was \(Re_\theta = 7500\) or \(Re_\tau = 2300\). A detailed analysis of the errors in derivative measurements was carried out, as well as applying and using consistency checks derived from the continuity equation and a local homogeneity hypothesis. Local homogeneity estimates of the dissipation are accurate everywhere within a few percent. Both local axisymmetry and local isotropy work almost as well outside of \(\mathrm{y}^+ = 100\), but only local axisymmetry provides a reasonable estimate close to the wall.