When a bubble impacts on a solid surface, it creates a complex flow field that can be difficult to predict. This is due to a number of factors, including the shape of the bubble, the speed at which it is moving, and the properties of the solid surface.
The new model developed by the researchers from the Chinese Academy of Sciences takes all of these factors into account and can accurately predict the flow field created by a bubble impact. The model is based on the Navier-Stokes equations, which are the governing equations of fluid dynamics. The researchers used a high-resolution numerical method to solve the Navier-Stokes equations for a variety of bubble impact scenarios.
The results of the researchers' simulations show that the flow field created by a bubble impact is highly three-dimensional and unsteady. The bubble initially deforms and then collapses, creating a jet of liquid that is ejected from the bubble. The jet then impinges on the solid surface and creates a splash.
The researchers' model can be used to predict the size and shape of the splash, as well as the velocity of the liquid jet. This information could be useful for a variety of applications, such as the design of underwater vehicles and the development of new medical treatments.
For example, the model could be used to design underwater vehicles that are more resistant to damage from bubble impacts. The model could also be used to develop new medical treatments that use bubbles to deliver drugs to specific parts of the body.
