Open Access Original Research Article

Structure Equations, Permitted Movement of Relativistic Continuum and Sagnac’s, Erenfest’s and Bell’s Paradoxes

S. A. Podosenov, J. Foukzon, E. R. Men’kova

Physical Science International Journal, Page 1-18
DOI: 10.9734/PSIJ/2017/30616

From obtained structure equations, restrictions on a space-time geometry for possible solutions of relativistic continua are studied. The Minkowski space proved to be “cramped” to describe the continuum if except for the medium motion equations one imposes rigidity and rotation conditions. The continuum is a basis of noninertial reference frames (NRF) where one studies different physical processes. For example, bases of simplest NRF are constructed: 1. Relativistic globally uniformly accelerated Born rigid NRF. 2. Relativistic Born rigid uniformly rotating reference frame (RF) without a horizon. 3. Rigid irrotational spherically symmetrical quasi-Einstein’s NRF. One can’t describe bases of these systems in the Minkowski space, the Riemannian space-time is needed. The space-time of these RF is not directly connected with the general relativity theory (GRT), though it imposes conditions on some solutions of the Einstein equations. A solution of the Sagnac’s, Erenfest’s and Bell’s paradoxes is proposed.

Open Access Original Research Article

Warming Effect Reanalysis of Greenhouse Gases and Clouds

Antero Ollila

Physical Science International Journal, Page 1-13
DOI: 10.9734/PSIJ/2017/30781

The author has reanalysed the warming effects of greenhouse (GH) gases utilising the latest HITRAN 2012 database and improved water continuum calculations in the spectral analysis tool. The contributions of GH gases in the GH effect in the all-sky conditions are found to be: H2O 81%, CO2 13%, O3 4%, CH4 & N2O 1%, and clouds 1%. Because the total absorption is already 93% from the maximum in the altitude of 1.6 km, which is the average global cloud base, the GH gas impacts are almost the same in the clear and all-sky conditions. The impacts of clouds are based on the normal cloudiness changes between the clear and cloudy skies. The positive impact of clouds is analysed and it is based on the warming impact of clouds during the night-time. The warming impact of CO2 is very nonlinear and it means that in the present climate the strength of H2O is 11.8 times stronger than CO2, when in the total GH effect this relationship is 6.2:1. The atmospheric Total Precipitable Water (TPW) changes during ENSO events are the essential parts of the ENSO process and they are not actually separate feedback processes. The TPW changes during the ENSO events almost double the original ENSO effects. On the other hand, during Mt. Pinatubo eruption and during the three latest solar cycles, the long-term water feedback effect cannot be found despite of rapid warming from 1980 to 2000. This empirical result confirms that the assumption of no water feedback in calculating the climate sensitivity of 0.6°C is justified. Because there is no long-term positive feedback, it explains why the IPCC model calculated temperature 1.2°C in 2015 is 44 % greater than the average 0.85ºC of the pause period since 2000. 

Open Access Original Research Article

Electroconductivity of Steady Viscous MHD Incompressible Fluid between Two Porous Parallel Plates Provoked by Chemical Reaction and Radiation

Alalibo T. Ngiangia, Sozo T. Harry

Physical Science International Journal, Page 1-13
DOI: 10.9734/PSIJ/2017/30177

The effect of electroconductivity on MHD fluid flow through an even pore spaces on two parallel plates was carried out. Solution to the governing equations and analysis of the resulting parameters showed that an increase in Schmidt number and Chemical reaction result in an increase in both the concentration and velocity profiles of the fluid. The increase in Prandtl number and radiation parameter also led to a decrease in the temperature and velocity profiles of the fluid. An increase in Reynolds number, Grashof number due to temperature and concentration all led to an increase in velocity profile of the fluid while Hartmann number and electroconductivity bring about a decrease in the velocity profile of the fluid. Special cases of the fluid configuration, shear stress, Nusselt number and Sherwood number is also examined.

Open Access Original Research Article

The Influence of Suspended Particles on Jeans Instability in Magneto Quantum Plasma with Thermal Conductivity

D. L. Sutar, R. K. Pensia

Physical Science International Journal, Page 1-9
DOI: 10.9734/PSIJ/2017/31508

The Jeans instability in magnetized quantum plasma is investigated by taking into account the thermal conductivity and suspended particles. The general dispersion relation is derived with the help of linearized perturbation equation using the normal mode analysis technique, which is reduced for both the transverse and the longitudinal mode of propagation. In the case of longitudinal propagation, the Jeans criterion of instability is affected by the thermal conductivity and quantum effect but the transverse mode of propagation, the Jeans condition is modified by the thermal conductivity, magnetic field, and quantum parameter. It is observed from curves that, thermal conductivity is destabilizing effect while magnetic field, suspended particles, Stoke drag parameter and quantum parameter have stabilized influence on the growth rate of gravitational instability.  

 

Open Access Original Research Article

Quantum Corrections to the Newton’s Law from the Galilean Limit of Quantum Gravity

Piero Chiarelli

Physical Science International Journal, Page 1-16
DOI: 10.9734/PSIJ/2017/31114

In this work the author derives the Galilean limit of the quantum gravity obtained by using the hydrodynamic approach. The result shows that the quantum interaction generates, in the limit of weak gravity, a non-zero contribution. The paper derives the small deviation from the Newtonian law due to the quantum gravity and analyzes the experimental features to validate the theoretical model. The work also shows that in the frame of the quantum gravity the equivalence principle between the inertial and gravitational mass can be violated in very extreme conditions.

 

Open Access Review Article

Jeans Instability of Self-gravitating Porous Medium under the Effect of Electron Plasma Frequency and Coriolis Force

A. Kumar, D. L. Sutar, R. K. Pensia

Physical Science International Journal, Page 1-12
DOI: 10.9734/PSIJ/2017/29315

This paper deals with the theoretical investigation of the combined effect of electron plasma frequency and Coriolis force on the hydromagnetic waves through a self gravitating porous medium in the presence of fine dust particles subjected to a transverse uniform magnetic field. A general dispersion relation is obtained using the normal mode analysis with the help of relevant linearized perturbation equation of motion. This dispersion relation is reduced for longitudinal and transverse modes of propagation. Dispersion relations for two modes are further reduced for the axis of rotation parallel and perpendicular to the direction of the magnetic field. We find that Jean’s criterion of instability remains valid but the expression of the critical Jean’s wave number is modified. The numerical analysis is performed to show the effect of thermal conductivity, relaxation time, rotation, Stokes drag and porosity of the medium on the growth rate of instability.