| 摘要 |
<p>A method for calculating a static contact angle, belonging to the field of material performance tests and comprising: based on the Young-Laplace equation, simulating a liquid drop edge of a certain type of liquid at different volumes and contact angles or a liquid drop edge at different volumes, contact angles and liquid parameters Deltarho/gamma, wherein Deltarho is the difference between liquid density and gas density, and gamma is the surface tension of the liquid; calculating a contact angle of the liquid drop edge generated through the simulation, and then obtaining the mapping relationship among the contact angle obtained through the calculation, the liquid drop volume and a true contact angle or the mapping relationship among the contact angle obtained through the calculation, the liquid drop volume, the liquid parameter and the true contact angle; shooting a true liquid drop image and calculating a contact angle of the image; and according to the mapping relationship and the contact angle of the actual image, obtaining an accurate contact angle using an interpolation method. The above-mentioned method can effectively reduce the error of a circle fitting method, an ellipse fitting method and a theta/2 method caused by a large liquid drop volume and contact angle, thereby improving the calculation efficiency and reducing the programming difficulty.</p> |
