FLUID CONTACT ANGLE ANALYSIS ON SOLIDS FOR VARIOUS MOLARITY PRICES BASED ON DIGITAL IMAGE

• Main Author: WIDYANANDA WINARDHI (NIM : 20216310) , CHANDRA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26237
• Institution: Institut Teknologi Bandung

The interaction between multiphase fluid and solid surface plays an important role in many fields such as petroleum, environment, agriculture, materials and others. This topic is discussed intensively and becomes a hot issue. These interactions is controlled by contact angles and surface tension. Based on that research about contact angle measurement to understand more about interaction between multiphase fluid and its influence in wettability. In this research, there are several variations contact angle measurement. The first is salinity variation with a variation of 1M to 5M. The second is surface variation using three types of surface, preparatory glass, and two different rock surface samples. Then observation of droplet form for variations was done. Observations done by recording using camera with 29 frames per second. Each frame is then processed using digital image processing to get the edge of the droplet shape and measure the contact angle using polynomial fitting. The results show that the higher the molarity, the obtained contact angle the higher as well. The contact angle result from rock surface variation is declining as the time goes because the droplet is both absorbed and evaporated. Measurement on carbonate rock surface is more irregular than on sandstone surface. This can be caused by the difference in the rock surface, which came from the difference in grain size distribution of the rock. The numerical simulation of spreading diameter have a similar trend compared to the experimentation result using Gads = 187 and Gads = 300. Both diameter went up quickly at the beginning of the iteration and video. The diameter still increased furthermore with a slower rate.