Search references for EDDY DIFFUSION. Phrases containing EDDY DIFFUSION
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Mixing of fluids due to eddy currents
dynamics, eddy diffusion, eddy dispersion, or turbulent diffusion is a process by which fluid substances mix together due to eddy motion. These eddies can vary
Eddy_diffusion
Swirling and reverse current in a turbulent flow regime
plans. Vortex Eddy pumping - component of vertical motion in eddies relevant for biology and biogeochemistry Eddy diffusion Haida Eddies Irminger Rings
Eddy_(fluid_dynamics)
Index of articles associated with the same name
Mass diffusivity, molecular diffusivity (often called "diffusion coefficient") Eddy diffusion, eddy diffusivity Kinematic viscosity, characterising momentum
Diffusivity
Transport of dissolved species from the highest to the lowest concentration region
enhances high gradients Atomic diffusion, in solids Bohm diffusion, spread of plasma across magnetic fields Eddy diffusion, in coarse-grained description
Diffusion
Layer of an atmosphere where the bulk gases are homogeneously mixed
where the bulk gases are homogeneously mixed due to turbulent mixing or eddy diffusion. The bulk composition of the air is mostly uniform so the concentrations
Homosphere
Altitude in the Earth's atmosphere below which turbulent mixing dominates
where the coefficient of Eddy diffusion is equal to the coefficient of molecular diffusion. Because the molecular diffusion coefficient is dependent on
Turbopause
Fluid transport regime by random walk
differential equation considering only the turbulent diffusion approximation in eddy diffusion: ∂ c i ∂ t + u ¯ j ∂ ( c ) ∂ x j = ∂ ∂ x j ( K j j ∂ (
Turbulent_diffusion
Loops of electric current induced within conductors by a changing magnetic field
In electromagnetism, an eddy current (also called Foucault's current) is a loop of electric current induced within conductors by a changing magnetic field
Eddy_current
American chemist credited with the invention of field flow fractionation
well as other separation techniques, including non-equilibrium, diffusion & eddy diffusion, pressure changes, flow in paper and thin-layer chromatography
J._Calvin_Giddings
Escape of gases from the atmosphere
mol + Φ i eddy {\displaystyle \Phi _{i}=\Phi _{i}^{\text{mol}}+\Phi _{i}^{\text{eddy}}} The vertical eddy diffusion flux is given by Φ i eddy = − K n d
Diffusion-limited_escape
Topics referred to by the same term
equation Eddy diffusion Anomalous diffusion, the movement of particles from a region of lower concentration to a region of higher concentration Diffusion MRI
Diffusion_(disambiguation)
Long rolls of counter-rotating air
layer flow and fluxes. The linear approximation, the eddy diffusivity equation with an eddy diffusion coefficient K, allowed Ekman to obtain a simple logarithmic
Horizontal_convective_rolls
Strait connecting the Atlantic and Caribbean
Pichincho can elevate the turbulent vertical diffusivity values (or eddy diffusion), and with a reduction of the Richardson number at the base of the pycnocline
Mona_Passage
Relation in chromatography
power of the column [m] A = Eddy-diffusion parameter, related to channeling through a non-ideal packing [m] B = diffusion coefficient of the eluting particles
Van_Deemter_equation
Method of utilizing water in magnetic resonance imaging
Diffusion-weighted magnetic resonance imaging (DWI or DW-MRI) is the use of specific MRI sequences as well as software that generates images from the
Diffusion-weighted magnetic resonance imaging
Diffusion-weighted_magnetic_resonance_imaging
(TKE) to improve parameterization of eddy diffusion coefficient K c {\displaystyle K_{c}} to account for large eddy transport in typical CBL. TKE gives
Convective planetary boundary layer
Convective_planetary_boundary_layer
British physicist and mathematician (1886–1975)
Cambridge University Press, ISBN 0-521-46121-9 Taylor, G. I. (January 1915). "I. Eddy motion in the atmosphere" (PDF). Philosophical Transactions of the Royal
G._I._Taylor
Zone in which oxygen saturation in seawater in the ocean is at its lowest
A.; Bianchi, D.; Pradal, M.A. (2013). "Critical role for mesoscale eddy diffusion in supplying oxygen to hypoxic ocean waters". Geophysical Research Letters
Oxygen_minimum_zone
Process of mechanically stirring a heterogeneous mixture to homogenize it
of reactants and products to and from the particles. The associated eddy diffusion increases the rate of mass transfer within the bulk of the fluid, and
Mixing_(process_engineering)
Accumulation of unwanted material on solid surfaces
fouling surface. This transport is often by molecular or turbulent-eddy diffusion, but may also occur by inertial coasting/impaction, particle interception
Fouling
Form of chromatography
diameter/solute diffusion coefficient in the mobile phase) A, B, and C are constants related to solute flow anisotropy (eddy diffusion), molecular longitudinal
Micellar liquid chromatography
Micellar_liquid_chromatography
Physical phenomenon
is different. Anomalous diffusion is the result of turbulence. Regions of higher or lower electric potential result in eddies because the plasma moves
Bohm_diffusion
Dutch physicist (1918–2004)
height equivalent theoretical plate, A is the eddy-diffusion parameter, B is the longitudinal diffusion coefficient of the eluting material in the longitudinal
Jan_van_Deemter
Mathematical model for turbulence
Large eddy simulation (LES) is a mathematical model for turbulence used in computational fluid dynamics. It was initially proposed in 1963 by Joseph Smagorinsky
Large_eddy_simulation
Mathematical modeling of chemical processes
reaction involves solving conservation equations describing convection, diffusion, and reaction source for each component species. ∂ ( ρ Y i ) ∂ t + ∇ ⋅
Chemical_reaction_model
Climate model
was broadened to the polar regions. It included parametrized drag, eddy diffusion, radiative processes but no topography. It could simulate the day-night
Leith_AGCM
heat conduction were important for the laboratory measurements, but eddy diffusion of heat and momentum dominated the atmospheric cells. Wind shear must
Remote sensing atmospheric boundary layer
Remote_sensing_atmospheric_boundary_layer
Mathematical concept applicable to physics
particles. In turbulent flows, the transport by eddy motion can be expressed as a grossly increased diffusion coefficient. In quantum mechanics, particles
Flux
Eddington number Eddington–Finkelstein coordinates Eddy (fluid dynamics) Eddy current Eddy diffusion Eden growth model Edgar Buckingham Edgar Choueiri
Index_of_physics_articles_(E)
Mathematical model of turbulence
eddy-viscosity based turbulence models, while being computationally cheaper than Direct Numerical Simulations (DNS) and Large Eddy Simulations. Eddy-viscosity
Reynolds stress equation model
Reynolds_stress_equation_model
Model in combustion
categories oxygen-rich diffusion flames and oxygen-deficient. Flame shapes also depend on the discharging velocity of fuel and air. Eddies inside the air flow
Eddy_break-up_model
Resistance of a fluid to shear deformation
"Revised Enskog theory for Mie fluids: Prediction of diffusion coefficients, thermal diffusion coefficients, viscosities, and thermal conductivities"
Viscosity
Dimensionless quantity in magnetohydrodynamics
a magnetic field by the motion of a conducting medium to the magnetic diffusion. It is the magnetic analogue of the Reynolds number in fluid mechanics
Magnetic_Reynolds_number
represents the isopycnal-flattening effects of eddies as advection (often misinterpreted as diffusion of surfaces). This parametrization is not perfect
Parametrization (atmospheric modeling)
Parametrization_(atmospheric_modeling)
Process by which aerosol particles collect onto solid surfaces
through sedimentation (settling) or impaction processes, while Brownian diffusion has the greatest influence on small particles. This is because very small
Deposition_(aerosol_physics)
Gas produced naturally within marshes, swamps and bogs
air–water interface. The diffusion can be accelerated and intensified by upwelling, such as the motion from turbulent eddies, and cooling processes. At
Marsh_gas
(eddy currents). Due to ohmic losses, the induced surface currents dissipate—this causes a change in the magnetic field, which induces subsequent eddy
Transient_electromagnetics
Ratio of a fluid's kinematic viscosity to mass diffusivity
characterize fluid flows in which there are simultaneous momentum and mass diffusion convection processes. It was named after German engineer Ernst Heinrich
Schmidt_number
Motion characterized by chaotic changes in pressure and flow velocity
which produces a hierarchy of eddies. Eventually this process creates structures that are small enough that molecular diffusion becomes important and viscous
Turbulence
Heat transfer due to the movement of fluid
convective heat transfer involves the combined processes of conduction (heat diffusion) and advection (heat transfer by bulk fluid flow). Convection is usually
Convection_(heat_transfer)
Length scale used in fluid dynamics
droplet of fluid that will diffuse in the same time it takes the energy in an eddy of size η to dissipate. The Batchelor scale can be determined by: λ B = η
Batchelor_scale
Mean kinetic energy per unit mass of eddies in turbulent flow
kinetic energy (TKE) is the mean kinetic energy per unit mass associated with eddies in turbulent flow. Physically, the turbulence kinetic energy is characterized
Turbulence_kinetic_energy
Dimensionless ratio of viscous to Coriolis forces
for the thickness of an Ekman layer, a boundary layer in which viscous diffusion is balanced by Coriolis effects, rather than the usual convective inertia
Ekman_number
Turbulence model
Transport turbulence model, or SST, is a widely used and robust 2-equation eddy-viscosity turbulence model used in Computational Fluid Dynamics. The model
Menter's Shear Stress Transport
Menter's_Shear_Stress_Transport
Electrical resistance of a thin film
as a four-point probe measurement) or indirectly by using a non-contact eddy-current-based testing device. Sheet resistance is invariable under scaling
Sheet_resistance
Combustion models of fuel reactions and energy release for computational fluid dynamics
model also takes into account an additional assumption that the mass diffusion coefficients of all species are equal. Owing to this additional assumption
Combustion_models_for_CFD
Model of electrically conducting fluids
magnetic Reynolds numbers, in which magnetic induction dominates magnetic diffusion at the velocity and length scales under consideration. Consequently, processes
Magnetohydrodynamics
Type of explosion
combustion). In a deflagration, the flame front grows through heat transfer and diffusion at speeds that are below the speed of sound, while in contrary in detonation
Deflagration to detonation transition
Deflagration_to_detonation_transition
Process in plasma physics
plasmas with oppositely directed magnetic fields together, resistive diffusion is able to occur on a length scale much shorter than a typical equilibrium
Magnetic_reconnection
Partial differential equation
equation is a fundamental partial differential equation and convection–diffusion equation occurring in various areas of applied mathematics, such as fluid
Burgers'_equation
Norwegian actress
ABCs of Death Frau Scheisse (voice) segment "H is for Hydro-Electric Diffusion" Escape (Flukt) Dagmar 2013 Kill Buljo 2 Anniken Skaiwalker Grandmother
Ingrid_Bolsø_Berdal
American inventor, executive, and musician (1943–2015)
Calmes' lifelong fascination with music first showed itself when playing Eddy Arnold songs on the ukulele, before learning guitar at the age of 15. The
Jack_Calmes
Former French television channel (1986–1987)
allocated the sixth channel slot to M6. Serge Gainsbourg, Johnny Hallyday, Eddy Mitchell and other personalities, called on the government in vain to try
TV6_(French_TV_channel)
Ratio of inertial to viscous forces acting on a liquid
intersect or even move counter to the overall direction of the flow (eddy currents). These eddy currents begin to churn the flow, using up energy in the process
Reynolds_number
Research of materials
evolving in materials including shape, size, composition and structure. Diffusion is important in the study of kinetics as this is the most common mechanism
Materials_science
Flow where fluid particles follow smooth paths in layers
surface. Laminar flow is a flow regime characterized by high momentum diffusion and low momentum convection. When a fluid is flowing through a closed
Laminar_flow
Vaporization of a liquid from its surface
the evaporation surface decreasing with flow velocity, decreasing the diffusion distance in the stagnant layer. The amount of minerals dissolved in the
Evaporation
137- 170, 2006. Edwards, J. R., Franklin, R., and Liou, M.-S., “Low-Diffusion Flux-Splitting Methods for Real Fluid Flows with Phase Transitions,” AIAA
Advection upstream splitting method
Advection_upstream_splitting_method
Immortal bird that is cyclically reborn
among them such as a Napoleon, have already been licked into that high-eddying Flame, and like moths consumed there. Still also have we to fear that incautious
Phoenix_(mythology)
the concept of collective intelligence and knowledge ecology (Pór 2000). Eddy et al. (2014) use information ecology for science-policy integration in ecosystems-based
Information_ecology
Fluid dynamics physicist
1976; Cambridge University Press). The terms Townsend's eddies (or Townsend's wall-attached eddies), Batchelor–Howells–Townsend spectrum and Townsend–Perry
Albert_Alan_Townsend
Process of water movement through a plant
decrease in hydrostatic pressure in the upper parts of the plants due to the diffusion of water out of stomata into the atmosphere. The word transpiration comes
Transpiration
Haida Eddies are episodic, clockwise rotating ocean eddies that form during the winter off the west coast of British Columbia's Haida Gwaii and Alaska's
Haida_Eddies
Spanish cyclist (1945–1996)
Retrieved 2007-07-20. Merckx, Eddy (1972). Plus d'un Tour dans mon sac; Mes carnets de route 1972. Editions arts et voyages diffusion gamma. "CLAS - RAZESA"
José_Manuel_Fuente
British milliner (born 1957)
Covent Garden, London as of 1995. In 1990, Jones launched a Miss Jones diffusion line for hats, and in 1993, this was followed by Jonesgirl which was exclusive
Stephen_Jones_(milliner)
Name list
first monk. The later saint Anthony of Padua also contributed to its diffusion. Equivalents include Antoine in French; Antonio in Italian and Spanish;
Anthony
législatives 2024 : LFI saisit la justice contre Renaissance pour « diffusion de fausses informations »". Le Monde. 28 June 2024. Archived from the
2024 French legislative election
2024_French_legislative_election
Belgian French-language television channel
the Belgian version of the JTL show, presented by Jean-Charles De Keyser, Eddy de Wilde and Bibiane Godfroid, was launched from a small studio in Roosevelt
RTL-TVI
One of the five families of stainless steel
penetrant inspection method but not the magnetic particle inspection method. Eddy-current testing may also be used. Grade EN 1.4980 (also known as A286) is
Austenitic_stainless_steel
Reduction in ductility of a metal exposed to hydrogen
turbo-aggregates. Non-Destructive methods like In situ eddy current and ultrasonic monitoring of hydrogen diffusion is also reported Recent studies have shown that
Hydrogen_embrittlement
Call Sony Computer Entertainment 2003-03-20JP Arcade Action: 30 Games SG Diffusion Phoenix Games 2004-11-19PAL Arcade Classics Volume One Play It! Play It
List of PlayStation 2 games (A–K)
List_of_PlayStation_2_games_(A–K)
Materials engineered to have properties that have not yet been found in nature
transverse waves), and diffusion equations (pertaining to diffusion processes). Crafted to govern a range of diffusion activities, diffusion metamaterials prioritize
Metamaterial
Unstable wave
interior of the wave after breaking, as the eddies on the surface become more viscous. Advection and molecular diffusion play a part in stretching the vortex
Breaking_wave
f)\,\,\,\forall {v}_{h}\in {\mathcal {V}}_{h}} Consider an advection–diffusion problem: { − μ Δ u + b ⋅ ∇ u = f in Ω u = 0 on ∂ Ω {\displaystyle
Variational_multiscale_method
Electricity generation by nuclear fusion
reactor volume larger, which reduces the rate of leakage due to classical diffusion. This is why ITER is so large. In contrast, inertial confinement systems
Fusion_power
Equations of motion for viscous fluids
acceleration ⏞ Inertia (per volume) = ∂ ∂ − ∇ w ⏟ Internal source + ν ∇ 2 u ⏟ Diffusion ⏞ Divergence of stress + g ⏟ External source . {\displaystyle \overbrace
Navier–Stokes_equations
introduced during the same period. Also of note is the fact that the period of diffusion of a technology can begin modestly and can extend well beyond the "age"
Technological and industrial history of Canada
Technological_and_industrial_history_of_Canada
Energy transfer between scales of motion
from k to k + dk. The largest eddies have low wavenumber, and the small eddies have high wavenumbers. Since diffusion goes as the Laplacian of velocity
Energy_cascade
Deep geological repository for radioactive waste
WIPP is located approximately 26 miles (42 km) east of Carlsbad, in eastern Eddy County, in an area known as the southeastern New Mexico nuclear corridor
Waste_Isolation_Pilot_Plant
1962 A Dialogue for This Decade: Sterling McMurrin B&W 20m June 5, 1962 Diffusion and Osmosis Stanley Croner (producer); Charles F. Finance color 14m August
List of Encyclopædia Britannica Films titles
List_of_Encyclopædia_Britannica_Films_titles
Non-fatal disease of the lungs
function. The majority (approximately 80%) of patient will have decrease diffusion capacity while fewer patients (approximately 20%) will have issues with
Diffuse_alveolar_damage
Transport protein
and mapped in 1989. At the cell surface, GLUT4 permits the facilitated diffusion of circulating glucose down its concentration gradient into muscle and
GLUT4
Canadian artist and fashion designer (born 1982)
overseeing the entire womenswear range. In 2013, Wu launched his debut diffusion line (a collection designed with a younger target in mind and retailed
Jason_Wu
Layering of a body of water due to density variations
until it has either mixed with its surroundings through turbulence and diffusion to match the density of the surroundings, reaches a depth where it has
Stratification_(water)
Widespread norms in a society
constantly evolving and occurs uniquely in place and time. It forms currents and eddies, and represents a complex of mutually interdependent perspectives and values
Popular_culture
1985 film by Robert Zemeckis
reduced to twenty frames. The bolt was drawn in black ink on white paper; diffusion effects and a glow were added by the optical department. The DeLorean
Back_to_the_Future
Model used in computational fluid dynamics
the transport of k or ε by advection, equals the transport of k or ε by diffusion, plus the rate of production of k or ε, minus the rate of destruction
K-epsilon_turbulence_model
Form of electroacoustic music
across the speaker array, using a performative technique known as sound diffusion. Bayle has commented that the purpose of the Acousmonium is to "substitute
Musique_concrète
American jazz trumpeter and singer (1901–1971)
2009. Morgenstern, Dan (1994), "Louis Armstrong and the Development and Diffusion of Jazz", in Miller, Marc H. (ed.), Louis Armstrong: A Cultural Legacy
Louis_Armstrong
1997 American crewed spaceflight
the Sodium Sulfur Battery Experiment (NaSBE), the Turbulent GAS Jet Diffusion (G-744) experiment, and the Autonomous EVA Robotic Camera/Sprint (AERCam
STS-87
Fluid flow revolving around an axis of rotation
streamlines is said to be solenoidal. As long as the effects of viscosity and diffusion are negligible, the fluid in a moving vortex is carried along with it
Vortex
Flow of the cytoplasm inside the cell
approximately 0.1 mm[vague]. In smaller cells, the diffusion of molecules is more rapid, but diffusion slows as the size of the cell increases, so larger
Cytoplasmic_streaming
Law of electrical current and voltage
{\displaystyle \eta =1/\mu _{0}\sigma } . Electronics portal Fick's law of diffusion Hopkinson's law ("Ohm's law for magnetics") Maximum power transfer theorem
Ohm's_law
Sports car
wider rear wing with larger end plates, new front plate with optimised diffusion under the front end. As part of NASCAR's embracing of GT3 in their Grand
Audi_R8_(Type_42)
Strong increase in phytoplankton abundance that typically occurs in the early spring
Increasing light intensity (in shallow water environments). Eddies (see ‘The role of eddies in the onset of the North Atlantic spring bloom’) A 2012 study
Spring_bloom
Ethio-Semitic language
of Ethiopia: A New Lexicostatistic Classification and Some Problems of Diffusion". Anthropological Linguistics. 13 (5): 173. JSTOR 30029540. Hetzron, Robert
Amharic
Sixth planet from the Sun
reactions with the resulting products being carried downward by eddies and diffusion. This photochemical cycle is modulated by Saturn's annual seasonal
Saturn
Source of gas emissions
relatively slow diffusion of methane through the soil. Additionally, because methane can travel more quickly through soil than water, diffusion plays a much
Greenhouse gas emissions from wetlands
Greenhouse_gas_emissions_from_wetlands
European cultural movement
and in St. Petersburg under Catherine II. In Italy, the main centers of diffusion of the Enlightenment were Naples and Milan: in both cities the intellectuals
Age_of_Enlightenment
Electromagnetic effect in physics
important role in star formation, research models indicate that Hall diffusion critically influences the dynamics of gravitational collapse that forms
Hall_effect
EDDY DIFFUSION
EDDY DIFFUSION
Surname or Lastname
English (Devon)
English (Devon) : from the Middle English personal name Edwy, Old English Ēadwīg, composed of the elements ēad ‘prosperity’, ‘fortune’ + wīg ‘war’.
Surname or Lastname
English
English : perhaps, as Reaney suggests, a patronymic from a personal name, a short form of Edwin or Edward, or for Eade 1.
Surname or Lastname
English
English : from a pet form of Eade.
Boy/Male
Hebrew English
Son of Adam: Man of the red earth.
Surname or Lastname
English
English : probably a variant of Eade. This name is also found in Normandy, France.
Boy/Male
American, Anglo, British, Christian, Danish, Dutch, English, French, German, Gothic, Netherlands, Swedish, Swiss
Names Beginning with Ed; Form of Edward; Guardian of Prosperity; Wealthy Defender; Wealthy Protector; Wealthy Guard
Surname or Lastname
English (West Yorkshire)
English (West Yorkshire) : from the Middle English personal name Addy, a pet form of Adam.
Surname or Lastname
English
English : unexplained.
Girl/Female
Norse Dutch German
Poetry.
Surname or Lastname
English and Scottish
English and Scottish : variant spelling of Eddy.
Girl/Female
French German
Nobility. French form of the Old German Adalheidis, a compound of 'athal' (noble) and 'haida'...
Boy/Male
French American English Swedish
Prosperous protector. A FrenchOld English name Eadmund, meaning rich or happy, and protection.
Boy/Male
French American English Greek
Prosperous protector. A FrenchOld English name Eadmund, meaning rich or happy, and protection.
Female
Italian
 Pet form of Italian Edvige, EDDA means "contending battle." Compare with another form of Edda.
Male
English
Variant spelling of English Eddie, EDDY means "guardian of prosperity."
Female
English
Pet form of English Adelaide, ADDY means "noble sort."
Surname or Lastname
English
English : from the Middle English personal name Ode (see Ott).
Female
English
 Variant spelling of English Eda, EDDA means "rich battle." Compare with another form of Edda.
Surname or Lastname
English
English : from a pet form of Eade.
Girl/Female
German, Hebrew
Pleasure; Enjoyment
EDDY DIFFUSION
EDDY DIFFUSION
Girl/Female
Arabic, Muslim
A Flower; Delicate; Soft; Slender
Boy/Male
Indian, Sanskrit
Lord Krishna
Boy/Male
Hindu, Indian, Sanskrit
Blissful
Female
Arthurian
, little moon.
Boy/Male
Hindu, Indian
God of Happiness; Good Health
Boy/Male
Hindu
Variant of shivani. Hindu Lord Shiva
Girl/Female
Israeli American
The laurel crown.
Girl/Female
Hindu
The intelligent
Surname or Lastname
English
English : unexplained; probably of French origin (see 2).Respelling of French Gambrelle, a reduced form of Gambarelle, a nickname denoting someone with long legs, from a derivative of gambe, Norman and Picard form of jambe ‘leg’.
Girl/Female
Australian, Chinese, Indonesian, Latin, Ukrainian
Young; Youthful; Soft Bearded; Female Version of Julius
EDDY DIFFUSION
EDDY DIFFUSION
EDDY DIFFUSION
EDDY DIFFUSION
EDDY DIFFUSION
v. t.
To collect as into an eddy.
pl.
of Eddy
n.
A backset; a countercurrent; an eddy.
n.
To whirl, or cause to whirl, as in an eddy.
n.
A current of water or air moving in a circular direction; a whirlpool.
pl.
of Edda
n.
A circle made by the notion of a fluid; an eddy; a ripple.
n.
A current of air or water running back, or in a direction contrary to the main current.
imp. & p. p.
of Eddy
v. i.
To whirl; to eddy.
a.
Easily irritated; sharp; as, an edgy temper.
p. pr. & vb. n.
of Eddy
v. i.
To run swiftly round, as a small stream flowing among stones or other obstructions; to eddy; also, to make a murmuring sound, as water does in running over or through obstructions.
v. i.
To move as an eddy, or as in an eddy; to move in a circle.
n.
A whirling motion; an eddy, as of water; a whirl.
n.
A pet name for a donkey.
a.
Having some of the forms, such as drapery or the like, too sharply defined.
n.
That which swallows irretrievably; a whirlpool; a sucking eddy.
pl.
of Neddy
n.
The religious or mythological book of the old Scandinavian tribes of German origin, containing two collections of Sagas (legends, myths) of the old northern gods and heroes.