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Now showing items 1-10 of 17

#### Couette flow of a binary gas mixture

(AIP Publishing, 1988-03)

The linearized binary model described by Hamel [Phys. Fluids 8, 418 (1964)] is used to obtain a set of kinetic equations and boundary conditions for the Couette flow problem. The derived set of two coupled integrodifferential ...

#### Pulse propagation in a randomly perturbed ocean: Single pulse statistics

(Acoustical Society of America, 1980-10)

A statistical theory of broadband single pulse propagation in a random ocean is presented. The mutual coherence function of the received signal is derived using an analysis based upon coupled mode theory. As propagation ...

#### the effect of nonzero viscosity ratio on the stability of fingers and bubbles in a Hele-Shaw cell

(AIP Publishing, 1988-11)

The linear stability of a steadily moving bubble or a finger in a Hele–Shaw cell is considered in the case when gravity and the ratio between the viscosities of the less and more viscous fluids are nonzero. The effect of ...

#### analytical solutions of model equations for two phase gas mixtures: Transverse velocity perturbations

(AIP Publishing, 1984)

Model equations for a dilute binary gas system are derived, using a linear BGK scheme. Complete analytical solutions for the stationary half_space problem are obtained for transverse velocity perturbations. The method of ...

#### the effect of surface tension on the shape of a Hele-Shaw cell bubble

(AIP Publishing, 1986-11)

Numerical and asymptotic solutions are found for the steady motion of a symmetrical bubble through a parallel‐sided channel in a Hele–Shaw cell containing a viscous liquid. The degeneracy of the Taylor–Saffman zero ...

#### exact behavior of Jost functions at low-energy

(AIP Publishing, 1988-01)

For Schrödinger operators with central potential q(r) and angular momentuml, the behavior of the Jost function F l (k) as k→0 is investigated. It is assumed that ∫∞ 0 d r (1+r)σ‖q(r)‖<∞, where σ≥1. Situations where q is ...

#### analytic theory for the selection of a two-dimensional needle crystal at arbitrary Péclet number

(American Physical Society, 1989-10)

An accurate analytic theory is presented for the velocity selection of a two-dimensional needle crystal for arbitrary Péclet number for small values of the surface-tension parameter. The velocity selection is caused by the ...

#### spectral properties of the Kronig-Penney Hamiltonian with a localized impurity

(AIP Publishing, 1989-06)

It is shown that there exist bound states of the operator H ±λ=−(d 2/d x 2) +∑ m∈Z δ(⋅−(2m+1)π)±λW, W being an L 1(−∞,+∞) non‐negative function, in every sufficiently far gap of the spectrum of H 0=−d 2/d x 2 +∑ m∈Z ...

#### location of essential spectrum of intermediate Hamiltonians restricted to symmetry subspaces

(AIP Publishing, 1988-10)

A theorem is presented on the location of the essential spectrum of certain intermediate Hamiltonians used to construct lower bounds to bound‐state energies of multiparticle atomic and molecular systems. This result is an ...

#### Peano compactifications and property metric spaces

(Hindawi, 1980-01-01)

Let (X,d) denote a locally connected, connected separable metric space. We say the X is S-metrizable provided there is a topologically equivalent metric ρ on X such that (X,ρ) has Property S, i.e. for any ϵ>0, X is the ...