Fluid dynamics Fluid dynamics Acoustic theory is the field relating to mathematical description of sound waves. It is derived from fluid dynamics. See acoustics for the engineering approach. ...more on Wikipedia about "Acoustic theory"
Added mass is the weight added to a system due to the fact that an ...more on Wikipedia about "Added mass"
Advection is the transport of a conserved scalar quantity that is transported in a vector field. A good example to have in mind would be the transport of pollution in a river: the motion of the water carries the polluted water downstream (see pigpen problem). ...more on Wikipedia about "Advection"
(Advection equation) [2] Zang, T: 1991, On the rotation and skew-symmetric forms for incompressible flow simulations, Applied Numerical Mathematics,7,27-40. ...more on Wikipedia about "Advection equation"
An adverse pressure gradient occurs when the static pressure increases in the direction of the flow. This is important for boundary layers, since increasing the fluid pressure is akin to increasing the potential energy of the fluid, leading to a reduced kinetic energy and a deceleration of the fluid. Since the fluid in the inner part of the boundary layer is relatively slower, it is more greatly affected by the increasing pressure gradient. For a large enough pressure increase, this fluid may slow to zero velocity or even become reversed. When flow reversal occurs, the flow is said to be separated from the surface. This may have practical consequences in aerodyanamics since flow separation significantly modifies the pressure distribution along the surface and hence the lift and drag. ...more on Wikipedia about "Adverse pressure gradient"
Aerodynamics is a branch of fluid dynamics concerned with the study of gas flows, first analysed by George Cayley in the 1800s. The solution of an aerodynamic problem normally involves calculating for various properties of the flow, such as velocity, pressure, density, and temperature, as a function of space and time. Understanding the flow pattern makes it possible to calculate or approximate the forces and moments acting on bodies in the flow. This mathematical analysis and empirical approximation form the scientific basis for heavier-than-air flight. The most aerodynamic shape is a raindrop. ...more on Wikipedia about "Aerodynamics"
An agitator is a mechanism to put something into motion by shaking or stirring. ...more on Wikipedia about "Agitator (device)"
An antibubble is a droplet of water surrounded by a thin film of air, as opposed to an air bubble, which is a sphere of air surrounded by a thin film of water. Antibubbles are formed when water drops or flows turbulently into water. They can either skim across the surface of the liquid, in which case they are also called water globules, or they can be completely submerged in the liquid. ...more on Wikipedia about "Antibubble"
An Archimedes number (not to be confused with Archimedes constant, π), named after the ancient Greek scientist Archimedes, to determine the motion of fluids due to density differences, is a dimensionless number in the form: ...more on Wikipedia about "Archimedes number"
Atmospheric physics is the application of physics to the study of the atmosphere. Atmospheric physicists attempt to model Earth's atmosphere and the atmospheres of the other planets using fluid flow equations, chemical models, radiation balancing, and energy transfer processes in the atmosphere (as well as how these tie in to other systems such as the oceans). In order to model weather systems, atmospheric physicists employ elements of scattering theory, wave propagation models, cloud physics, statistical mechanics and spatial statistics which are highly mathematical and related to physics. ...more on Wikipedia about "Atmospheric physics"
Atmospheric sciences is an umbrella term for the study of the atmosphere, its processes, the effects other systems have on the atmosphere, and the effects of the atmosphere on these other systems. ...more on Wikipedia about "Atmospheric sciences"
Atomization is the reduction of infinitesimal particles (such as of a fluid) to a fine spray or mist, often by passing the particles through a nozzle. ...more on Wikipedia about "Atomization"
AUTODYN is an explicit software package for non-linear dynamics. It incorporates finite element analysis, computational fluid dynamics, a meshfree (SPH) capability and coupling between these techniques and material physics. ...more on Wikipedia about "AUTODYN"
Baroclinic Instability is a fluid dynamic instability which helps to understand some important features of the so-called large scale waves in the mid-latitude atmosphere. These waves provide a mechanism for transporting heat and angular momentum and are believed to control the temperature gradient between the equator and the pole. The first ...more on Wikipedia about "Baroclinic instability"
The www.shortopedia.com spirit Fluid_dynamics
In fluid dynamics, the baroclinity (sometimes called baroclinicity) is a measure of the stratification in a fluid. A baroclinic atmosphere is one for which the density depends on both the temperature and the pressure; contrast this with barotropic atmosphere, for which the density depends only on the pressure. ...more on Wikipedia about "Baroclinity"
In meteorology, a barotropic atmosphere is one in which the density depends only on the pressure, so that isobaric surfaces are also isopycnic surfaces (i.e. surfaces of constant density). The isobaric surfaces will also be isothermal surfaces, hence (from the thermal wind equation) the geostrophic wind is independent of height. Hence the motions of a rotating barotropic fluid are strongly constrained. ...more on Wikipedia about "Barotropic"
A simplified form of the vorticity equation for an inviscid, divergence-free flow, the barotropic vorticity equation can simply be stated as ...more on Wikipedia about "Barotropic vorticity equation"
The mathematical model for the velocity in the Θ direction in the Batchelor vortex is: ...more on Wikipedia about "Batchelor vortex"
There are two Bejan numbers (Be) in use, named after Adrian Bejan in two scientific domains: thermodynamics and fluid mechanics. ...more on Wikipedia about "Bejan number"
The Benedict-Webb-Rubin equation (BWR) is an equation of state used in fluid dynamics. ...more on Wikipedia about "Benedict-Webb-Rubin equation"
In fluid dynamics, Bernoulli's equation, derived by Daniel Bernoulli, describes the behavior of a fluid moving along a streamline. There are typically two different formulations of the equations; one applies to incompressible fluids and the other applies to compressible fluids. ...more on Wikipedia about "Bernoulli's equation"
—Bernoulli's principle states that in fluid flow, an increase in velocity occurs simultaneously with decrease in pressure. This principle is a simplification of Bernoulli's equation which states that the sum of all forms of energy in a fluid flowing along an enclosed path is the same at any two points in that path. It is named after the Dutch/ Swiss mathematician/scientist Daniel Bernoulli, though it was previously understood by Leonhard Euler and others. For a mathematical formulation, see Bernoulli's equation. In a fluid flow with no viscosity, and therefore one in which a pressure difference is the only accelerating force, it is equivalent to Newton's laws of motion. It is important to note that the only cause of the change in fluid velocity is the difference in pressures either side of it. It is very common for the Bernoulli effect to be quoted as if it states that a change in velocity causes a change in pressure. The Bernoulli principle does not make this statement and it is not the case. ...more on Wikipedia about "Bernoulli's principle"
Blade element theory is a mathematical process originally designed in the nineteenth century to determine the behaviour of propellers. It involves breaking an airfoil down into several small parts then determining the forces on them. These forces are then converted into accelerations, which can be integrated into velocities and positions. ...more on Wikipedia about "Blade element theory"
The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid. A liquid may change to a gas at temperatures below the boiling point through the process of evaporation. Any change of state from a liquid to a gas at boiling point is considered vaporization. However, evaporation is a surface phenomenon, in which only molecules located near the gas/liquid surface could evaporate. Boiling on the other hand is a bulk process, so at the boiling point molecules anywhere in the liquid may be vaporized, resulting in the formation of vapor bubbles. ...more on Wikipedia about "Boiling point"
In physics and fluid mechanics, the boundary layer is that layer of fluid in the immediate vicinity of a bounding surface. In the atmosphere the boundary layer is the air layer near the ground affected by diurnal heat, moisture or momentum transfer to or from the surface. On an aircraft wing the boundary layer is the part of the flow close to the wing. The Boundary layer effect occurs at the field region in which all changes occur in the flow pattern. The boundary layer distorts surrounding nonviscous flow. It is a phenomenon of viscous forces. This effect is related to the Leidenfrost effect and the Reynolds number. ...more on Wikipedia about "Boundary layer"
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