channelflow.org

====== L2Dist ====== compute the L2 Distance between two fields options <code> -sx --shiftx shift by Lx/2 -sz --shiftz shift by Lz/2 <flowfield> (trailing arg 2) input field #1 <flowfield> (trailing arg 1) input field #2 </code> usage <code> L2Dist u.ff v.ff </code> returns <latex> \text{L2Norm(u-v)} = \|{\bf u} - {\bf v}\| = \left(\frac{1}{L_x L_y L_z} \int_{\Omega} \|{\bf u} - {\bf v}|^2\,\, d{\bf x} \right)^{1/2} </latex> Note: the -sx and -sz options apply shifts by Lx/2 and Lz/2 to one of the fields prior to computation of the norm. This is helpful for my research but might not be of interest to others.