Investigating the dynamic behavior of the nano-bubble in two-phase systems of argon and water: A molecular dynamics simulation approach

In this work, the dynamic behavior of the nano-bubble and the factors affecting its stability in argon two-phase systems in the absence and presence of water have been investigated using molecular dynamics simulations. According to the simulation results, addition of water to argon has led to the following changes in the nano-bubble: faster formation as well as increase in its stability, lifespan, and size. In addition, in the finite time stability of the nano-bubble, its radius of curvature slightly shift. These changes lead to oscillate motions, which can be considered as the nano-bubble breathing. The breathing movements cause more flexibility of the vapor nano-bubble, which makes it more stable. Moreover, the obtained results indicate that in the presence of water the contact angle increases.Importantly, we observed that the three-phase contact line is not only unstable during the stability of the nano-bubble, but also its values are slightly changing. Therefore, we showed what factors could be related to changes and fluctuations in the three-phase contact line.