FDS can output the root mean square (RMS), co-variance, and cross-correlation for both point and line \ct{DEVC} outputs. To test these outputs a 1 m$^3$ box with open sides and a 10 cm grid size is defined with two inlet vents centered on adjacent faces. This results in two orthogonal flow streams that collide at the center of the box and exit diagonally. Within the diagonal portion of the flow, are placed point measurements for the FDS outputs of the u-velocity RMS, the u-velocity/w-velocity co-variance, and the u-velocity/w-velocity cross-correlation.
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