A simple explicit formula for the effective dielectric constant of binary 0-3 composites

We have derived a simple, analytic formula for the prediction of the effective dielectric constant of binary 0-3 composite materials. In comparison with a popular formula in the field (Jayasundere and Smith [1]), it gives the expected asymptotic value for the internal electric field of the inclusions when their total volume fraction tends to one. It is also applicable to the whole range of the volume fraction of the inclusions and is reasonably good for all values of the dielectric constants of the constituents. For non-conductive constituents, it gives effective complex permittivity prediction that fits well to experimental data, out-performs the Jayasundere-Smith formula and a linearized version [2, 3] of the well-known Bruggeman formula.     

A theory of binary liquid mixture evaporation from capillaries

A theory of binary liquid mixture evaporation from capillaries is developed. Expressions defining mixture composition and the law of meniscus motion during evaporation are obtained.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 46, No. 3, pp. 442–446, March, 1984.     

Viscous isothermal motion of a binary gas mixture through an orifice

Motion of gases through an orifice at low Knudsen number is studied.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 55, No. 1, pp. 77–85, July, 1988.     

Development of convection in binary mixture with soret effect

The future Space experiment IVIDIL is planned to study the influence of vibration stimuli on the measurements of diffusion and thermodiffusion coefficients. A binary mixture of water and isopropanol is chosen as a working liquid. The principle of the Space experiment and ground based research are outlined. In addition preparatory experiments might be performed during parabolic flights. Results of 3D numerical simulations of thermal vibrational convection in binary mixture at the conditions of the parabolic flight are presented. Heat and mass transport arising in the system with increasing of vibration actions is discussed.     

Minimum spouting velocity of binary mixture with non-spherical particles

The minimum spouting velocity, U_ms, defined for stable external spouting, is found also crucial to ensure good mixing when multi-component particles are involved in spouted beds. In this study, experiments were performed in a cylindrical-conical spouted bed to study the influences of diverse factors on the U_ms of a binary system with the cylindrical particles and the spherical bed material. The results showed that the changes in U_ms with the particle properties (particle shape, size, and density) and operating conditions were closely related to the blending ratio of the mixture. When the volume fraction of the non-spherical particles was relatively small (less than 40% to 50%), U_ms mainly depended on the properties of the bed material. It was considered acceptable to estimate U_ms by assuming that the system only consisted of the spherical bed material. Otherwise, the cylindrical particle shape has a significant influence on the flow dynamics and U_ms. For such spouting systems, an equivalent diameter of the bed material was proposed to reflect the shape effects of non-spherical particles, whereby U_ms would be independent of the blending ratio. Consequently, a novel empirical correlation is proposed to quantitatively predict the U_ms of binary mixtures.     

Influence of surface interaction between drug and excipient in binary mixture for dry powder inhaler applications

The present study documents the drug-excipient incompatibility in the physical mixtures and its influence on bulk homogeneity and flowability for dry powder inhalers (DPI) applications. Binary mixtures with the model drugs (aceclofenac; salbutamol sulphate) and lactose monohydrate were prepared separately at varied drug loading (1–33 wt.%), and their physicochemical properties were assessed using various characterization techniques. The DSC, P-XRD and FT-IR studies show a significant shift in the signature peak of drug and excipient while ss-NMR, LC-MS show the absence of peaks. In contrast, new peaks are observed in LC-MS and GC studies. The insights are comprehended through a series of XPS studies. The findings indicated the formation of condensed or addition compound. This is attributed to an interaction between polar protic groups (-NH-, -COOH, -OH) and hemiacetal carbon (HO-C-OR) of drug and excipient in the solid-state. It induces crystal strain and alters bulk properties related to mixing (relative standard deviation, %RSD), cohesion and flow function coefficient (FFC). However, surface modification of excipient using MgSt and aerosil R972 (model nano-particle) eliminates such inter-particle interactions, crystal level changes. It improves the bulk properties of binary mixtures pivotal for DPI performance.     

Unsteady flows of a binary mixture of incompressible Newtonian fluids in an annulus

This paper is concerned with applying the mixture theory of two chemically inert incompressible Newtonian fluids to some simple unsteady flows in the annular region between two infinitely long coaxial cylinders. The equations governing the motion of the binary mixture under discussion are reduced to a system of coupled partial differential equations. With the help of finite Hankel transforms, the exact solutions of these equations are obtained in series form for the following three problems: (i) unsteady axial Couette flow in an annulus, (ii) unsteady Poiseuille flow in an annulus, (iii) unsteady circular Couette flow in an annulus.     

二元相互作用系数推算方法的发展

回顾了二元相互作用系数直接估算方法的研究进展,细致分析了这些推导方式的应用范围,理论基础,以及精度范围,以期获得更有通用性的二元相互作用系数的预测模型,以能更方便地计算混合工质相平衡,尤其是缺乏实验数据的体系.     

Some ground-state properties of a binary boson mixture

The optimal Jastrow wave function in the hypernetted-chain scheme is shown to generate numerically suitable expressions for the pressure and the compressibility of a binary boson mixture. In the single-component case, spin-polarized tritium is shown to be unstable for densities below 0.0044 Å^–3.     

Stochastic laser-beam transfer through a binary Markovian mixture

We present an approximate analysis of a stochastic laser-beam transfer through a scattering two-component Markovian mixture. We also compare this transfer with a transfer of the beam through an equivalent uniform medium. The problem is considered by use of the so-called small-angle approximation. Within the framework of our approach we obtain some sets of differential equations, defining a total transferred energy and an effective beam size. Our results show that transfer of laser radiation through binary Markovian media differs considerably from transfer through uniform media.     

Effect of an electric field on the ignition of a binary mixture of gaseous reactants

It is shown that under certain conditions in an electric field a reactant can be ignited or can ignite spontaneously before electrical breakdown occurs in the gas.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 24, No. 6, pp. 1015–1022, June, 1973.     

An enumeration formula for certain irreducible polynomials with an application to the construction of irreducible polynomials over the binary field

We establish a formula for the number of irreducible polynomialsf(x) over the binary fieldF ₂ of given degreen 2 for which the coefficient ofx ^n-1 and ofx is equal to 1. This formula shows that the number of such polynomials is positive for alln 2 withn 3. These polynomials can be applied in a construction of irreducible self-reciprocal polynomials overF ₂ of arbitrarily large degrees.     

Separation of a binary mixture in a thermodiffusion column with a spiral winding

The solution of the transfer equation in a thermodiffusion column with spiral winding in sampling conditions is given for the case c(l -c) const.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 48, No. 1, pp. 92–95, January, 1985.