S. M. Abo-Dahab

Bio: S. M. Abo-Dahab is an academic researcher from South Valley University. The author has contributed to research in topics: Thermoelastic damping & Magnetic field. The author has an hindex of 29, co-authored 177 publications receiving 2252 citations. Previous affiliations of S. M. Abo-Dahab include Assiut University & Taif University.

Influence of MWCNT/Fe3O4 hybrid nanoparticles on an exponentially porous shrinking sheet with chemical reaction and slip boundary conditions

Abstract: Hybrid nanofluids are of great importance in the field of industry due to high effective thermal conductivity which causes high rates of heat transfer. The current article investigates the impact of variable magnetic field and chemical reaction of MWCNT/Fe3O4–water hybrid nanofluid over an exponentially shrinking porous sheet with slip boundary conditions. Suitable transformations convert the governing equations into coupled nonlinear ordinary differential equations. Further, these equations are solved by the help of shooting technique. The influences of operating parameters on the flow domain as well as force coefficients and rates of heat and mass transfers are computed and shown through graphs and tables. It is found that hybridity augments the temperature and concentration profiles. Further, suction/injection parameter enriches the skin friction coefficient, but reverse trend is observed for velocity slip parameter.

MHD Casson nanofluid flow over nonlinearly heated porous medium in presence of extending surface effect with suction/injection

Abstract: An exertion is executed to explicate thermophysical aspects of viscoelastic fluid flow produced by a nonlinearized stretched surface. Here, viscoelasticity is characterized by Casson fluid model and expressed rheologically in momentum equation. Flow attributes of Casson fluid are thoroughly investigated under transversal magnetized field and along with provision of suction/injection to surface. Flow medium is also considered to be porous. Convective heating is supplied to the surface to depict heat transfer change within the flow domain. Nanosized particles are hanged into the Casson fluid to understand the effectiveness of Brownian motion and thermophoretic forces on the diffusion of particles. Generative chemical reactions are also considered to measure mass transport. Initially, flow narrating differential equations for concerning a problem are attained in differential equations and later on transforming into ordinary differential coupled system via similarity approach. Variations in flow associated distributions against involved parameters are divulged through graphical structures. Wall drag, thermal and mass fluxes are also calculated. Credibility of computing results is tested with the aid of comparison with previously published data in limiting sense.

"relative State" Formulation of Quantum Mechanics

Abstract: The task of quantizing general relativity raises serious questions about the meaning of the present formulation and interpretation of quantum mechanics when applied to so fundamental a structure as the space-time geometry itself. This paper seeks to clarify the foundations of quantum mechanics. It presents a reformulation of quantum theory in a form believed suitable for application to general relativity. The aim is not to deny or contradict the conventional formulation of quantum theory, which has demonstrated its usefulness in an overwhelming variety of problems, but rather to supply a new, more general and complete formulation, from which the conventional interpretation can be deduced. The relationship of this new formulation to the older formulation is therefore that of a metatheory to a theory, that is, it is an underlying theory in which the nature and consistency, as well as the realm of applicability, of the older theory can be investigated and clarified.

An Introduction to the Theory of Seismology

Abstract: IN view of the number of different lines of approach, a borderline subject is apt to amass a vast literature, some of it difficult of access to investigators This is particularly true of seismology ; the phenomena of earthquakes have attracted the attention of many famous geologists, and the recording of earthquake tremors involves the methods of experimental physics, while the interpretation of the records of earthquakes has provided a great stimulus to the development of the theory of the propagation of disturbances in elastic media and has ultimately thrown considerable light on the composition of the interior of the earth Many books have been written on seismology in its various aspects, but many of the most interesting modern geophysical developments have hitherto been available only in the original papers It is therefore of considerable interest to read the elegant exposition that Prof K E Bullen has presented in the book under review An Introduction to the Theory of Seismology By Prof K E Bullen Pp xiv + 276 (Cambridge: At the University Press, 1947) 18s net