Simulation of droplet topography on super-hydrophobic surface

We established a novel droplet model (with-gravity model) to show the gravity effect of the droplet in the contact angle experiment. By using with-gravity model, we obtained a three-dimensional topography of the droplet including the height of the droplet, the shape of the baseline and the circumference of the baseline. Comparing the with-gravity model with the ideal spherical model, our model considered the measurement error caused by gravity effect in the contact angle experiment which is a key point to influence the three-dimension topography of the droplet. From the calculation of our model, we found that there were two important points to enhance the measurement error: the size of the droplet and the contact angle. With the droplet and the contact angle became larger, measurement error was obviously increased.