Fig. 2.

Predictability of dp/dz and η_rel by using microviscometric analysis of μ-PIV data obtained from glass capillary tubes in vitro. Ratio of the measured to predicted value of dp/dz versus the corresponding measured value (A) and ratio of the empirically estimated (3) to predicted value of η_rel versus the corresponding empirically estimated value (B). Predicted values were determined by applying the microviscometric method to the μ-PIV data obtained from the glass-tube experiments. The light and dark shaded regions span, respectively, one and two standard deviations in the distributions around unity. The standard deviation corresponds to 23% for dp/dz and 16% for η_rel. The correlation coefficient, r_c, is shown for its corresponding predicted quantity.