Journal of the Egyptian Mathematical Society

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Transient Taylor–Dean flow in a composite annulus with porous walls partially filled with porous material
Journal of the Egyptian Mathematical Society - - 2022
Basant K. Jha, Taiwo S. Yusuf
AbstractThe sole aim of this article is to examine the relative contribution of suction/injection parameter on Taylor–Dean flow in a composite annular gap partially filled with porous material. In the present setup, the Newtonian fluid flow is induced by the circumferential motion of both cylinders and pressure gradient imposed in the Azimuthal direction. The mathe...... hiện toàn bộ
Effects of Navier slip on a steady flow of an incompressible viscous fluid confined within spirally enhanced channel
Journal of the Egyptian Mathematical Society - Tập 28 - Trang 1-24 - 2020
J. A. Gbadeyan, J. U. Abubakar, T. L. Oyekunle
Investigation of the effect of slip on natural convective flow and heat transfer of a viscous incompressible fluid confined within a channel made up of a long vertical wavy wall and a parallel flat wall is carried out in this article. It is assumed that at the flat wall, there exists the slip condition. The coupled non-linear differential equations governing the fluid flow subjected to the relevan...... hiện toàn bộ
Casson rheological flow model in an inclined stenosed artery with non-Darcian porous medium and quadratic thermal convection
Journal of the Egyptian Mathematical Society -
J. U. Abubakar, Q. A. Omolesho, K. A. Bello, A. M. Basambo
AbstractThe current study investigates the combined response of the Darcy–Brinkman–Forchheimer and nonlinear thermal convection influence among other fluid parameters on Casson rheology (blood) flow through an inclined tapered stenosed artery with magnetic effect. Considering the remarkable importance of mathematical models to the physical behavior of fluid flow in...... hiện toàn bộ
Nanofluids flow over a permeable unsteady stretching surface with non-uniform heat source/sink in the presence of inclined magnetic field
Journal of the Egyptian Mathematical Society - Tập 27 - Trang 1-26 - 2019
N. S. Elgazery
This work analyzes the unsteady two-dimensional nanofluid flow over a vertical stretching permeable surface in the presence of an inclined magnetic field and non-uniform heat source/sink. Four different types of nanoparticles, namely silver Ag, copper Cu, alumina Al2O3, and titania TiO2, are considered by using water as a base fluid with the Prandtl number Pr = 6.785. The governing partial differe...... hiện toàn bộ
Edge even graceful labeling of some graphs
Journal of the Egyptian Mathematical Society - Tập 27 Số 1 - 2019
Mohamed R. Zeen El Deen
New traveling wave solutions of MHD micropolar fluid in porous medium
Journal of the Egyptian Mathematical Society - Tập 28 - Trang 1-22 - 2020
Muhammad Jamil, Arsalan Ahmed
This paper aims to determine the exact solutions of non-Newtonian fluid namely micropolar fluid with MHD in a porous medium by traveling wave method. The governing equations of incompressible micropolar fluid with MHD in a porous medium are non-linear PDEs reduced to ODEs through wave parameter ξ=mx+ny+Ut. The set of new exact solutions are determined for five different cases. In special cases, th...... hiện toàn bộ
Bi-univalent properties for certain class of Bazilevič functions defined by convolution and with bounded boundary rotation
Journal of the Egyptian Mathematical Society - Tập 27 Số 1 - 2019
M. K. Aouf, S. M. Madian, A. O. Mostafa
Reduction based on similarity and decision-making
Journal of the Egyptian Mathematical Society - Tập 28 - Trang 1-12 - 2020
Abd El Fattah A. El Atik
Reduction of attributes in an information system (IS) is a basic step for IS analysis. The original rough set model of Pawlak depends on an equivalence relation which is strongly constraints. This paper aims to use similarity classes and similarity degrees to obtain a reduction of IS and indicate an approach by using an example from biochemistry to get a quantitative structure activity relationshi...... hiện toàn bộ
Mathematical modelling of the COVID-19 pandemic with demographic effects
Journal of the Egyptian Mathematical Society - Tập 29 - Trang 1-13 - 2021
Abdul A. Kamara, Lagès N. Mouanguissa, Godfrey Okumu Barasa
In this paper, a latent infection susceptible–exposed–infectious–recovered model with demographic effects is used to understand the dynamics of the COVID-19 pandemics. We calculate the basic reproduction number ( $${R}_{0}$$ ) by solving the differential equations of the model and also using next-ge...... hiện toàn bộ
Bivariate general exponential models with stress-strength reliability application
Journal of the Egyptian Mathematical Society - Tập 28 - Trang 1-15 - 2020
S. K. khames, N. A. Mokhlis
In this paper, we introduce two families of general bivariate distributions. We refer to these families as general bivariate exponential family and general bivariate inverse exponential family. Many bivariate distributions in the literature are members of the proposed families. Some properties of the proposed families are discussed, as well as a characterization associated with the stress-strength...... hiện toàn bộ
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