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Flutter is a dynamic instability of an elastic structure in a fluid flow, caused by positive feedback between the body's deflection and the force exerted by the fluid flow. In a linear system , "flutter point" is the point at which the structure is undergoing simple harmonic motion —zero net damping —and so any further decrease in net ...
Flutter (software) Flutter is an open-source UI software development kit created by Google. It can be used to develop cross platform applications from a single codebase for the web, [ 4] Fuchsia, Android, iOS, Linux, macOS, and Windows. [ 5] First described in 2015, [ 6][ 7] Flutter was released in May 2017.
Flutter valve. In respiratory medicine, a flutter valve (also Pneumostat valve, and Heimlich valve) is a one-way check valve used to prevent airflow back into a chest tube, and usually is applied to drain air from a pneumothorax. [ 1] The design of the flutter valve features a rubber sleeve in a plastic case, where the rubber sleeve is arranged ...
Courtesy, Cesareo de La Rosa Siqueira. In fluid dynamics, vortex shedding is an oscillating flow that takes place when a fluid such as air or water flows past a bluff (as opposed to streamlined) body at certain velocities, depending on the size and shape of the body. In this flow, vortices are created at the back of the body and detach ...
For the case of flutter analysis, lift history for the motion obtained from the Wagner analysis (Herbert A. Wagner) with varying frequency of oscillation shows that magnitude of lift decreases and a phase lag develops between the aircraft motion and the unsteady aerodynamic forces. Reduced frequency can be used to explain the amplitude ...
Coronary artery disease ( CAD ), also called coronary heart disease ( CHD ), ischemic heart disease ( IHD ), [ 13] myocardial ischemia, [ 14] or simply heart disease, involves the reduction of blood flow to the cardiac muscle due to build-up of atherosclerotic plaque in the arteries of the heart. [ 5][ 6][ 15] It is the most common of the ...
Vortex-induced vibration (VIV) is an important source of fatigue damage of offshore oil exploration drilling, export, production risers, including steel catenary risers (SCRs) and tension leg platform (TLP) tendons or tethers. These slender structures experience both current flow and top-end vessel motions, which both give rise to the flow ...
The term controlled aerodynamic instability phenomena was first used by Cristiano Augusto Trein [1] in the Nineteenth KKCNN Symposium on Civil Engineering [2] held in Kyoto, Japan, in 2006. The concept is based on the idea that aerodynamic instability phenomena, such as Kármán vortex street, flutter, galloping and buffeting, can be driven ...