member 428835
Hello again pf!
i was wondering if any of you could help me with the intuition for the following structure function:
$$S_{xy}(R) = \overline{\big[v_x (x + R) - v_x(x)\big] \big[v_y(x+R) - v_y(x) \big]}$$
where ##v_i## is the velocity in the ##i## direction, ##x## is distance, and ##R## is a displacement in ##x## (##R## need not be infinitesimal, and in fact isn't always!). Now this looks something like covariance mixed with a derivative?
can i get any help here?
thanks!
i was wondering if any of you could help me with the intuition for the following structure function:
$$S_{xy}(R) = \overline{\big[v_x (x + R) - v_x(x)\big] \big[v_y(x+R) - v_y(x) \big]}$$
where ##v_i## is the velocity in the ##i## direction, ##x## is distance, and ##R## is a displacement in ##x## (##R## need not be infinitesimal, and in fact isn't always!). Now this looks something like covariance mixed with a derivative?
can i get any help here?
thanks!