Topic
Paddle
About: Paddle is a research topic. Over the lifetime, 5649 publications have been published within this topic receiving 28389 citations.
Papers published on a yearly basis
Papers
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12 May 1980
TL;DR: In this article, a floating-on-a-body-of-water compressed-air-generating assemblies and methods are disclosed which are utilized to drive electrical generators powered by compressed air.
Abstract: Floating-on-a-body-of-water compressed-air-generating assemblies and methods are disclosed which are utilized to drive electrical generators powered by compressed air. The integrated assembly utilizes windmills, reciprocating float-linkage means, collapsible paddle blades, and at least one member selected from the water-motion-actuated group consisting of slosh boxes, sliding masses, rack-and-pinions, and combinations thereof.
18 citations
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TL;DR: It is shown that a major source of the agitation in a paddle cell is vortices shed from the paddle, which results in a mass-transfer limit that is periodic in nature and that may exhibit spatial variations related to the paddle wake.
Abstract: Mass-transfer properties of a continuously reciprocating paddle reactor are investigated using computational fluid dynamic simulations. The flow induced by the paddle motion is modeled with a moving mesh assuming laminar flow. Spatial and temporal mass-transfer data are gathered over many paddle cycles under diffusion-limited conditions. Transient, numerical simulations of this type are computationally expensive, but can add insight into flow phenomena that are difficult to observe experimentally. It is shown that a major source of the agitation in a paddle cell is vortices shed from the paddle. This results in a mass-transfer limit that is periodic in nature and that may exhibit spatial variations related to the paddle wake. A simulation-based, mass-transfer correlation is presented that relates various design and operating parameters within a generic paddle reactor. The mass-transfer trends predicted by the numerical simulations are compared with experimental mass-transfer correlations found in the literature.
18 citations
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12 Dec 1991TL;DR: A paddle shaft assembly with adjustable pitch paddles for use in a magnetic stirring apparatus is described in this article, where the paddle assembly is used for suspending cell, or tissue, cultures in a growing medium.
Abstract: A paddle shaft assembly having adjustable-pitch paddles for use in a magnetic stirring apparatus. The paddle assembly is particularly useful for magnetic stirring apparatus used for suspending cell, or tissue, cultures in a growing medium. The paddle shaft assembly includes an upper support shaft lockable to a lower support shaft for allowing the assembly to be mounted within a magnetic stirring vessel closure. The lower shaft includes a bore for accommodating removable stirring magnets. The paddle shaft assembly further includes removable paddle members having a hollow body sized and configured to be positionable within a 360 degree arc upon end portions of stirring magnets.
18 citations
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24 Oct 1996
TL;DR: An agitator for a paint mix tank is characterized by a paddle that has passages in it extending between opposite sides thereof and that is reciprocated up and down in the tank to keep the paint mixed and pigments and fillers in the paint in suspension.
Abstract: An agitator for a paint mix tank is characterized by a paddle that has passages in it extending between opposite sides thereof and that is reciprocated up and down in the tank to keep the paint mixed and pigments and fillers in the paint in suspension. The paddle is reciprocated in the tank in linear directions generally along paths through its passages. Reciprocation is provided by a motor operating through a gearbox, and the speed of the motor is adjustable to control the reciprocation rate of the paddle. The passages through the paddle improve its agitation performance and enable its linear speed to be sufficiently low during agitation of the paint to eliminate foaming of and entrapment of air in the paint. A process is also dislosed for mixing the liquid contents of the tank without foaming and aeration by providing the above apparatus.
18 citations
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20 Mar 2014
TL;DR: In this paper, a rod, a handle, and a weight member are used to adjust the resistance of a paddle exercise apparatus when the user moves the exercise apparatus through a paddling motion.
Abstract: A paddle exercise apparatus includes a rod, a handle, and a weight member. The a rod includes first and second ends and is configured for grasping by a first hand of a user at a location between the first and second ends. The handle is positioned at the first end of the rod and is configured for grasping by a second hand of the user. The weight member is mounted to the rod and adjustably positioned between the first and second ends of the rod to alter a resistance of the paddle exercise apparatus when the user moves the paddle exercise apparatus through a paddling motion.
18 citations