Intensity of vortices: from soap bubbles to hurricanes
نویسندگان
چکیده
By using a half soap bubble heated from below, we obtain large isolated single vortices whose properties as well as their intensity are measured under different conditions. By studying the effects of rotation of the bubble on the vortex properties, we found that rotation favors vortices near the pole. Rotation also inhibits long life time vortices. The velocity and vorticity profiles of the vortices obtained are well described by a Gaussian vortex. Besides, the intensity of these vortices can be followed over long time spans revealing periods of intensification accompanied by trochoidal motion of the vortex center, features which are reminiscent of the behavior of tropical cyclones. An analysis of this intensification period suggests a simple relation valid for both the vortices observed here and for tropical cyclones.
منابع مشابه
On the use of helium‐filled soap bubbles for large‐scale tomographic PIV in wind tunnel experiments
tracing fidelity is controlled by the flow rates of helium, liquid soap and air in HFSB production. A characteristic time response, defined as the ratio of slip velocity and the fluid acceleration, is obtained. The feasibility of performing time-resolved tomographic PIV measurements over large volumes in aerodynamic wind tunnels is also studied. The flow past a 5-cm-diameter cylinder is measure...
متن کاملSoap Bubbles: Part 1
love soap bubbles. They're beautiful, delicate, and though they live only briefly, it's a glorious moment. They float on the air, brilliant colors wobbling over their surface, and when they pop into nothingness, it's just an opportunity to make more bubbles! This issue and next I'll talk about the chemistry, physics, and computer graphics of soap bubbles. Here I'll focus on the physics of soap ...
متن کاملInteractive Blow and Burst of Giant Soap Bubbles
Previous studies on virtual soap bubbles mainly focused on methods for visualizing the physical and geometrical properties of soap bubbles and paid little attention to the possible ways to enhance the interaction between the simulation and the user. In this paper, a user interaction-based giant soap bubble simulation system is proposed in which the free-form shape, size, and position of giant s...
متن کاملCapturing the Reflectance Model of Soap Bubbles
We describe a system for rendering bubbles in natural environments using filtered environment maps. The system incorporates the optical properties of soap bubbles such as the interference patterns generated by the film. We describe a mathematical model to simulate the reflectance properties of the bubbles using a bidirectional reflectance field. This BRDF is used to filter an environment map ca...
متن کاملJellyfish Party: Blowing Soap Bubbles in Mixed Reality Space
This paper describes a Mixed Reality installation named Jellyfish Party, for enjoying playing with soap bubbles. A special feature of this installation is the use of a spirometer sensor to measure the amount and speed of expelled air used to blow virtual soap bubbles.
متن کامل