Capillary hysteresis and the relationship between drying and wetting curves

A simple microscopic model predicts the wetting and drying scanning curves from only one boundary of the main hysteresis loop. Comparison with experiments shows that if the shape of the drying scanning curves varies smoothly, then the drying boundary of the loop is indeed sufficient to predict all scanning curves. However, if the shape of the drying curves changes abruptly, the model is still applicable, but the drying boundary yields only the wetting scanning curves, and the wetting boundary yields only the drying scanning curves. For this case the model seems more reliable for predicting the scanning curves than for the application of interpolation techniques between the two boundaries.