Because it's a different situation. A ball in free fall accelerates at 1g downwards, regardless of it's horizontal movement. Those air pockets are not always accelerating upwards at the same rate.PeterO said:Why should these bubbles behave so differently to the balls.
The movement of the air pocket is dominated by the flow of the water, which is being modified by the dolphins. The inertia and angular momentum of the water are modulating the effect of the buoyant force.Nickelodeon said:The problem is I can't understand why the ring doesn't immediately float to the surface.
What do you mean by that? The vortex constitutes a circular flow.Nickelodeon said:there doesn't appear to be any modifying air flow associated with the smoke ring
A ring vortex is a type of fluid motion in which a spinning column of fluid forms a ring shape. This occurs when a fluid, such as air or water, is injected into a stagnant fluid, creating a rotating flow pattern.
A ring vortex is created when a fluid is injected into another fluid with opposite or no rotation. This can happen naturally, such as in the formation of tornadoes, or it can be created artificially, such as in laboratory experiments.
A ring vortex is characterized by a rotating column of fluid with a central core of low pressure. It also has a distinct ring shape and can exhibit strong rotational and axial velocities.
Ring vortices have various applications in fluid dynamics, such as in studying turbulence and mixing, as well as in industrial processes like fuel injection and vortex pumps. They are also important in understanding natural phenomena like tornadoes and hurricanes.
Ring vortices are studied using various experimental and computational methods. These include flow visualization techniques, such as dye injection and particle image velocimetry, as well as numerical simulations using computational fluid dynamics (CFD) models.