AIP Publishing
SCOPUS (1965,1967-1970,1972-1976,1979,1981,1983-1988,1992)
0031-9171
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Các bài báo tiêu biểu
Equation of motion for a small rigid sphere in a nonuniform flow
Tập 26 Số 4 - Trang 883-889 - 1983
The forces on a small rigid sphere in a nonuniform flow are considered from
first prinicples in order to resolve the errors in Tchen’s equation and the
subsequent modified versions that have since appeared. Forces from the
undisturbed flow and the disturbance flow created by the presence of the sphere
are treated separately. Proper account is taken of the effect of spatial
variations of the undist...
Finite-Resistivity Instabilities of a Sheet Pinch
Tập 6 Số 4 - Trang 459-484 - 1963
The stability of a plane current layer is analyzed in the hydromagnetic
approximation, allowing for finite isotropic resistivity. The effect of a small
layer curvature is simulated by a gravitational field. In an incompressible
fluid, there can be three basic types of ``resistive'' instability: a long-wave
``tearing'' mode, corresponding to breakup of the layer along current-flow
lines; a short-wa...
Couple Stresses in Fluids
Tập 9 Số 9 - Trang 1709-1715 - 1966
The effects of couple stresses in fluids are considered. Linearized constitutive
equations are proposed for force and couple stresses. A series of boundary-value
problems are solved to indicate the effects of couple stresses as well as for
experiments measuring the various material constants. It is found that a size
effect comes in which is not present in the nonpolar case (couple stresses
absent)...
Collisionless Damping of Nonlinear Plasma Oscillations
Tập 8 Số 12 - Trang 2255-2262 - 1965
It is well known that the linear theory of collisionless damping breaks down
after a time τ ≡ (m/eεκ)½, where κ is the wavenumber and ε is the amplitude of
the electric field. Jacobi elliptic functions are now used to provide an exact
solution of the Vlasov equation for the resonant electrons, and the damping
coefficient is generalized to be valid for times greater than t = τ. This
generalized dam...
Nonlinear, three-dimensional magnetohydrodynamics of noncircular tokamaks
Tập 19 Số 1 - Trang 134-140 - 1976
Rosenbluth’s nonlinear, approximate tokamak equations of motion are generalized
to three dimensions. The equations describe magnetohydrodynamics in the low β,
incompressible, large aspect ratio limit. Conservation laws are derived and a
well-known form of the energy principle is recovered from the linearized
equations. The equations are solved numerically to study kink modes in tokamaks
with recta...
Coherent structures—reality and myth
Tập 26 Số 10 - Trang 2816-2850 - 1983
The nature and significance of large-scale coherent structures in turblent shear
flows are addressed. A definition for the coherent structure is proposed and its
implications discussed. The characteristic coherent structure properties are
identified and the analytical and experimental constraints in the eduction of
coherent structures are examined. Following a few comments on coherent motions
in w...
Mechanism of atomization of a liquid jet
Tập 25 Số 10 - Trang 1730-1742 - 1982
In the atomization regime of a round liquid jet, a diverging spray is observed
immediately at the nozzle exit. The mechanism that controls atomization has not
yet been determined even though several have been proposed. Experiments are
reported with constant liquid pressures from 500 psia (33 atm) to 2500 psia (166
atm) with five different mixtures of water and glycerol into nitrogen, helium,
and x...
Rotational and Vibrational Relaxation in Diatomic Gases
Tập 2 Số 4 - Trang 449-462 - 1959
Calculations of rotational and vibrational relaxation times for gases composed
of homonuclear diatomic molecules have been carried out. The model used for the
molecular interaction potential consists of an attractive component, which acts
between geometrical centers of the molecules, and a repulsive component which is
assumed to originate from two centers of force in each of the molecules. For
lar...
Geodesic Acoustic Waves in Hydromagnetic Systems
Tập 11 Số 11 - Trang 2448-2450 - 1968
In toroidal systems with geodesic curvature an electrostatic acoustic mode
occurs with plasma motion in the magnetic surfaces, perpendicular to the field.
In typical stellarators this mode should dominate ordinary sound waves
associated with motion along the field.
Statistical theory for compressible turbulent shear flows, with the application to subgrid modeling
Tập 29 Số 7 - Trang 2152-2164 - 1986
A statistical theory for compressible turbulent shear flows subject to buoyancy
effects is developed. Important correlation functions in compressible shear
flows are calculated with the aid of a multiscale direct-interaction
approximation. They are expressed in the gradient-diffusion form similar to the
eddy-viscosity representation for the Reynolds stress in incompressible flows.
The results obta...