Fig. 2.

The theoretical HCT dependence of the decorrelation value for different flow speeds, time intervals and scattering coefficients based on the normalized field temporal correlation function and concentration dependent particle scattering properties. The relationship between decorrelation value and HCT are shown at different flow speeds of (A) $\langle v\rangle =0.5$mm/s, (B) $\langle v\rangle =1$mm/s, (C), $\langle v\rangle =2.5$mm/s with a fixed time interval of 5 ms. The relationships are also shown with different time intervals of (D) $\Delta t=1$ms, (E) $\Delta t=2$ms, (F), $\Delta t=3.5$ms at a fixed flow speed of 3 mm/s. The black solid lines are based on Twersky’s formula and the red dashed lines are based on the empirical model.