Greek Letters P x Y = kinematic viscosity 4 $ = empirical constant used in Eq. 13 = lateral microscale of turbulence = x / M , dimensionless distance from grid = r/fiA, dimensionless distance between two points Subscripts and Superscripts 0 = initial value = partial differentiation; u i j = bui/dxj, ui,Ij = b2Ui/bx?, etc. i j , k = Cartesian coordinate components -= time-smoothed value = root-mean-square value
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