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Seam-shifted Wake
Seam-shifted wake (SSW) is an aerodynamic phenomenon involving baseballs. The term was coined in 2019 by Andrew Smith during his work on the phenomenon with Barton L. Smith (no relation) at Utah State University (USU). Nazmus Sakib and John Garrett also contributed to the early work. The USU group showed that Major League Baseball (MLB) baseball seams, when in specific locations relative to the direction of the ball, force the boundary layer to separate earlier (closer to the front of the ball) than it normally would. If this occurs on one side of the ball and not on the opposite side, a net force is produced. This force can be similar in magnitude to that caused by spin (i.e. the Magnus effect). In the particle image velocimetry image shown, the seam on the top of the ball is causing separation (wake formation) on the top closer to the front of the ball than normal. The separation on the bottom of the ball is at the normal location. The resultant movement from this effect had bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utah State University
Utah State University (USU or Utah State) is a public university, public land grant colleges, land-grant research university with its main campus in Logan, Utah, United States. Founded in 1888 under the Morrill Land-Grant Acts as Utah's federal land-grant institution, Utah State serves as one of Utah's two flagship universities. It is Carnegie Classification of Institutions of Higher Education, classified among "R1: Doctoral Universities – Very high research activity". The Logan campus is the state's largest public residential campus, with more than 84% of students living away from home. As of fall 2023, Utah State had 28,063 enrolled students, including 20,259 at its main Logan campus. The university has a presence statewide, with a total of 30 statewide campuses and more than 50 research institutes and centers. Among these research institutes is the Space Dynamics Laboratory (SDL), which is the sole University Affiliated Research Center (UARC) for the Missile Defense Agency, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boundary Layer
In physics and fluid mechanics, a boundary layer is the thin layer of fluid in the immediate vicinity of a Boundary (thermodynamic), bounding surface formed by the fluid flowing along the surface. The fluid's interaction with the wall induces a No-slip condition, no-slip boundary condition (zero velocity at the wall). The flow velocity then monotonically increases above the surface until it returns to the bulk flow velocity. The thin layer consisting of fluid whose velocity has not yet returned to the bulk flow velocity is called the velocity boundary layer. The air next to a human is heated, resulting in gravity-induced convective airflow, which results in both a velocity and thermal boundary layer. A breeze disrupts the boundary layer, and hair and clothing protect it, making the human feel cooler or warmer. On an aircraft wing, the velocity boundary layer is the part of the flow close to the wing, where viscosity, viscous forces distort the surrounding non-viscous flow. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnus Effect
The Magnus effect is a phenomenon that occurs when a spin (geometry), spinning Object (physics), object is moving through a fluid. A lift (force), lift force acts on the spinning object and its path may be deflected in a manner not present when it is not spinning. The strength and direction of the Magnus force is dependent on the speed and direction of the rotation of the object. The Magnus effect is named after Heinrich Gustav Magnus, the German physicist who investigated it. The force on a rotating cylinder is an example of Kutta–Joukowski theorem, Kutta–Joukowski lift, named after Martin Kutta and Nikolay Zhukovsky (scientist), Nikolay Zhukovsky (or Joukowski), mathematicians who contributed to the knowledge of how lift is generated in a fluid flow. Description The most readily observable case of the Magnus effect is when a spinning sphere (or cylinder) curves away from the arc it would follow if it were not spinning. It is often used by football (soccer) and volleybal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SSW Sinker
SSW may refer to: * South-southwest, a compass direction (one of the eight "half-winds") * SSW (TV station), the callsign of a TV station in the South West and Great Southern regions of Western Australia * Seminary of the Southwest, an Episcopal seminary in Austin, Texas, USA * St. Louis Southwestern Railway, reporting mark SSW * South Schleswig Voter Federation, German: ''Südschleswigscher Wählerverband'' * Schichau Seebeckwerft, a German shipbuilding corporation * Siemens-Schuckertwerke, a German electrical engineering company * Special Service Wing, a special forces unit of the Pakistan Air Force * Sudden stratospheric warming, a meteorological phenomenon in the upper troposphere * Sutton SignWriting * Southern States Wrestling, a professional wrestling promotion * Swati language ISO 639 code * Samsung White, former ''League of Legends'' team * Seam-shifted wake Seam-shifted wake (SSW) is an aerodynamic phenomenon involving baseballs. The term was coined in 2019 by Andrew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Athletic
''The Athletic'' is a subscription-based sports journalism department of ''The New York Times''. It provides national and local coverage in 47 North American cities as well as the United Kingdom. ''The Athletic'' also covers national stories from top professional and college sports. ''The Athletic'' coverage focuses on a mix of long-form journalism, original reporting, and in-depth analysis. Its business model is predicated on dis-aggregating the sports section of local newspapers, and reaching non-local fans not reached by a local newspaper. ''The Athletic'' was launched by Alex Mather and Adam Hansmann in January 2016 as an independent subscription-based online sports magazine. It gradually expanded its stable of writers over the next few years to provide better coverage of more teams in more markets, including in the United Kingdom. However, the magazine remained unable to earn enough revenue without advertising to make a profit, and the owners began to seek an outside buy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laminar Flow
Laminar flow () is the property of fluid particles in fluid dynamics to follow smooth paths in layers, with each layer moving smoothly past the adjacent layers with little or no mixing. At low velocities, the fluid tends to flow without lateral mixing, and adjacent layers slide past one another smoothly. There are no cross-currents perpendicular to the direction of flow, nor eddies or swirls of fluids. In laminar flow, the motion of the particles of the fluid is very orderly with particles close to a solid surface moving in straight lines parallel to that surface. Laminar flow is a flow regime characterized by high momentum diffusion and low momentum convection. When a fluid is flowing through a closed channel such as a pipe or between two flat plates, either of two types of flow may occur depending on the velocity and viscosity of the fluid: laminar flow or turbulent flow. Laminar flow occurs at lower velocities, below a threshold at which the flow becomes turbulent. The thresh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbulence
In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to laminar flow, which occurs when a fluid flows in parallel layers with no disruption between those layers. Turbulence is commonly observed in everyday phenomena such as surf, fast flowing rivers, billowing storm clouds, or smoke from a chimney, and most fluid flows occurring in nature or created in engineering applications are turbulent. Turbulence is caused by excessive kinetic energy in parts of a fluid flow, which overcomes the damping effect of the fluid's viscosity. For this reason, turbulence is commonly realized in low viscosity fluids. In general terms, in turbulent flow, unsteady vortices appear of many sizes which interact with each other, consequently drag due to friction effects increases. The onset of turbulence can be predicted by the dimensionless Reynolds number, the ratio of kinetic energy to viscous damping ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swing Bowling
Swing bowling is a bowling (cricket), bowling technique in cricket, in which the ball is made to curve through the air. This is in the hope that the change in the ball's flight path will deceive the batter and cause them to play the ball incorrectly. A bowler who uses this technique is called a swing bowler. Swing bowling is generally classed as a type of fast bowling. A swing bowling Delivery (cricket), delivery is either an inswinger, where the ball curves in towards the batter, or an outswinger, where the ball curves away from the batter. A swing bowler often bowls a mixture of inswingers and outswingers (as well as other non-swinging types of delivery), by changing how they hold the ball. To make the ball swing, a bowling side continually polishes one side of the ball by applying sweat to it, as well as rubbing it against their clothing to shine it, while allowing the opposite side to become gradually more rough through the course of play. Conventional swing, also called o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baseball
Baseball is a bat-and-ball games, bat-and-ball sport played between two team sport, teams of nine players each, taking turns batting (baseball), batting and Fielding (baseball), fielding. The game occurs over the course of several Pitch (baseball), plays, with each play beginning when a player on the fielding team (baseball), fielding team, called the pitcher, throws a Baseball (ball), ball that a player on the batting team (baseball), batting team, called the Batter (baseball), batter, tries to hit with a baseball bat, bat. The objective of the offensive team (batting team) is to hit the ball into the field of play, away from the other team's players, allowing its players to run the Base (baseball), bases, having them advance counter-clockwise around four bases to score what are called "Run (baseball), runs". The objective of the defensive team (referred to as the fielding team) is to prevent batters from becoming Base running, runners, and to prevent runners base running ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerodynamics
Aerodynamics () is the study of the motion of atmosphere of Earth, air, particularly when affected by a solid object, such as an airplane wing. It involves topics covered in the field of fluid dynamics and its subfield of gas dynamics, and is an important domain of study in aeronautics. The term ''aerodynamics'' is often used synonymously with gas dynamics, the difference being that "gas dynamics" applies to the study of the motion of all gases, and is not limited to air. The formal study of aerodynamics began in the modern sense in the eighteenth century, although observations of fundamental concepts such as aerodynamic drag were recorded much earlier. Most of the early efforts in aerodynamics were directed toward achieving Aircraft#Heavier-than-air – aerodynes, heavier-than-air flight, which was first demonstrated by Otto Lilienthal in 1891. Since then, the use of aerodynamics through mathematical analysis, empirical approximations, wind tunnel experimentation, and computer si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
