Molecular Dynamics Simulations of Nanobubble Collapse Near Different Boundaries | Chapter 10 | Advances and Challenges in Science and Technology Vol. 3

 In this study, microscopic dynamics simulations were used to search the dynamics of a distinct nanobubble caused by a sudden strong wave collapsing nearly two hard and one adaptable boundaries. Molecular movement (MD) is a computer imitation method for resolving the physical drives of atoms and molecules. The atoms and fragments are admitted to interact for a established period of time, bestowing a view of the dynamic "progress" of the system. Polyethylene dressed as the flexible obstruction, while aluminum and iron were used to devise the stiff limits. A pattern called the impetus mirror was used to create the shock waves that hit the nanobubble inside a microscopic system. The movement of a single nanobubble made by shock and its collapse at responsive and stiff hurdles were investigated in this place work for two various distances from the walls. The bounds' collapse-induced damage in addition to the atomic speed contours surrounding the alone nanobubble were studied.  The collapse-inferred damage on the boundaries was acquired from ten giving way nanobubbles. Results showed that the relative divider distance affected the distinct nanobubble’s collapse dynamics forthcoming the boundaries. A produce nanojet was directed on the surfaces all along the collapse process for all cases. In addition, the induced damages in the wisdom of the polyethylene surface, iron surface, and aluminum surface for the relative obstruction distance of γ = 1.3 were obtained as 6.0, 0.47, and 0.63 nm, individually. It was observed that the insight of the collapse-induced damage for the nanobubble breaking near the iron barrier was lower than the collapse-persuaded damage for the aluminum perimeter. However, the erosion insight formed on the polyethylene perimeter was much greater than the deterioration depth of two together rigid borders. Furthermore, the damage width made on the surfaces of polyethylene and aluminum was 12.0 nm and 7.0 nm, individually. This shows that the deterioration width for polyethylene was again much greater than the deterioration width for container. Finally, the damages formed on the frontiers for the relative wall distance of γ = 1.3 were as well the damages on the boundaries at relative obstruction distance of γ = 1.8.

Author(s) Details:

Ebrahim Kadivar,
Institute of Ship Technology, Ocean Engineering and Transport Systems, University of Duisburg-Essen, 47057 Duisburg, Germany.

Ali Rajabpour,
Advanced Simulation and Computing Laboratory (ASCL), Mechanical Engineering Department, Imam Khomeini International University, P.O. Box: 341489-6818, Qazvin, Iran.

Ould el Moctar,
Institute of Ship Technology, Ocean Engineering and Transport Systems, University of Duisburg-Essen, 47057 Duisburg, Germany.

Please see the link here: https://stm.bookpi.org/ACST-V3/article/view/12022