#### Physica Scripta

Journal Information
ISSN / EISSN : 00318949 / 14024896
Current Publisher: IOP Publishing (10.1088)
Former Publisher: Royal Swedish Academy of Sciences (10.1238)
Total articles ≅ 19,496
Current Coverage
SCOPUS
SCIE
COMPENDEX
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#### Latest articles in this journal

Published: 18 November 2019
Physica Scripta; doi:10.1088/1402-4896/ab588e

Abstract:This article presents the theoretical study of the physiological phenomenon brought up by filtration of a non-Newtonian Casson fluid between two parallel permeable membranes. This situation corresponds to blood filtration process in a flat plate hemodialyzer (FPH). Seepage of fluid across the membrane is considered in accordance with the Darcy's law and the equations of motion governing the flow are modeled. Using the low Reynolds number and long membrane length assumption, equations of motion are solved exactly. Equations describing velocity and pressure filed and various flow variables are derived and effects of wall slip parameter, wall filtration coefficient and the yield stress are presented graphically. A strong influence of these parameters is observed on the flow in an FPH. Theoretical values of the membrane filtration coefficient and mean pressure drop in an FPH are calculated and they are found to be in close agreement with the corresponding available empirical and experimental values in the literature. For certain limiting range of physical parameters, derived solutions reveal that the axial flow rate of Casson fluid in an FPH decays at an exponential rate. This is a physically valid and widely admitted result, used by several researchers in studying the blood filtration process in renal tubules of mammalian kidneys. Since the presented solutions in this article are reduced to their corresponding Newtonian fluid flow solutions between permeable membrane, therefore, it is concluded that a wide range of applications in physiology and engineering can be covered up by the present investigation.
Rima Mebrek, Rachid Fermous, Mourad Djebli
Published: 15 November 2019
Physica Scripta; doi:10.1088/1402-4896/ab57fb

Abstract:Based on fluid model, the three-dimensional expansion of ultracold plasma is studied. The model considered both thermal pressure and ambipolar potential rising due to the local charge separation. By using isothermal assumption and quasi-neutrality condition, the time dependent asymetric expansion parametric investigation is conducted for two different ultracold plasma ion species ($Sr^+$ and $Ca^+$). It is found that ion temperature, in the range of ultracold limit, didn't affect strongly the expanding profile but decreases the expanding density by an amount of $\sim 0.5\%$ to $\sim 7\%$.The ion inertia is also found to enhance the asymetric aspect of the anisotrpic plasma expansion.
Published: 15 November 2019
Physica Scripta, Volume 95; doi:10.1088/1402-4896/ab3d5d

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Yating Yu, Kuanhou Gao, Theodoros Theodoulidis, Fei Yuan
Published: 15 November 2019
Physica Scripta, Volume 95; doi:10.1088/1402-4896/ab3d66

Binayak S Choudhury, Soumen Samanta
Published: 15 November 2019
Physica Scripta, Volume 95; doi:10.1088/1402-4896/ab3d43

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Published: 15 November 2019
Physica Scripta, Volume 95; doi:10.1088/1402-4896/ab3ddf

The publisher has not yet granted permission to display this abstract.
Published: 15 November 2019
Physica Scripta, Volume 95; doi:10.1088/1402-4896/ab3d06

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Ilya Vilkoviskiy
Published: 15 November 2019
Physica Scripta, Volume 95; doi:10.1088/1402-4896/ab3d1a

Abstract:In this paper, we explore the persistent current in thin superconducting wires and accurately examine the effects of the phase slips on that current. The main result of the paper is the formula for persistent current in terms of the solutions of certain (nonlinear) integral equation. This equation allows to find asymptotics of the current at long(small) length of the wire, in that paper, we interested in the region in which the system becomes strongly interacting and very few amounts of information can be extracted by perturbation theory. Nevertheless, due to the integrability, exact results for the current can be obtained. We observe that at the limit of a long wire, the current becomes exponentially small, we believe that it is the signal that phase slips may destroy superconductivity for long wires, below BKT phase transition.
Aihua Lin, Per Kristen Jakobsen
Published: 15 November 2019
Physica Scripta, Volume 95; doi:10.1088/1402-4896/ab3d0d

Abstract:In this paper we discuss some of the mathematical and numerical issues that have to be addressed when calculating wave scattering using the EOS approach. The discussion is framed in context of light scattering by objects whose optical response can be of a non-linear and/or inhomogeneous nature. The discussions address two issues that, more likely than not, will be part of any investigation of wave scattering using the EOS approach.
Pablo Martin, Fernando Maass, Francisco Calderon, Freddy Lastra
Published: 15 November 2019
Physica Scripta, Volume 95; doi:10.1088/1402-4896/ab2b1a

Abstract:An analytic solution is presented in this paper for the electric potential nearby a wall in a confined plasma. This is well fitted for both sheath and pre-sheath regions. In the sheath region, the potential is well adapted to the differential equation proposed by Bohm. Following to the pre-sheath region, the potential is also well suited decaying to zero electric field in the plasma, which is a physical condition. The potential is also valid for any value of the parameter K measuring the dimensionless Bohm velocity.