Open Access Original Research Article

Heat and Mass Transfer of Laminar Boundary Layer Flow of Non-Newtonian Power Law Fluid past a Porous Flat Plate with Soret and Dufour effects

K. Saritha, M. N. Rajasekhar, B. Shashidar Reddy

Physical Science International Journal, Page 1-13
DOI: 10.9734/PSIJ/2016/26957

This article numerically studies the heat and mass transfer of a laminar boundary layer flow of a non-Newtonian power law fluid past a porous flat plate. The solution takes the suction/injection, power law index, Soret and Dufour effects into consideration. The governing boundary layer partial differential equations along with boundary conditions are first cast into a dimensionless form by a similarity transformation and the resulting ordinary differential equations are then solved numerically using implicit finite difference scheme. The influence of Soret and Dufour parameters, suction/injection, power law index, Prandtl number and Lewis number on non-dimensional velocity, temperature and concentration fields are discussed graphically. Tha variation of Power law index, Soret and Dufour numbers on heat and mass transfer rates is presented in tabular form.

 

Open Access Original Research Article

A New Approach in Interpretation and Solving Certain Hydrodynamic Phenomena and Systems

Andrei Nechayev

Physical Science International Journal, Page 1-11
DOI: 10.9734/PSIJ/2016/26624

A new theoretical description of a number of hydrodynamic phenomena and paradoxes (such as laminar-turbulent transition, Magnus effect, Einstein's tea leaves paradox, drag mechanism, wing lift, Karman vortex Street) is proposed. This description is based on the fundamental equations of hydrodynamics and corresponding detection of low and high pressure zones in the given fluid flow.

 

Open Access Original Research Article

Energy Management Optimizing in Energy HUB with Regard to Pollution and Storage Effects

Gholamreza Sarlak, Seyed Morteza Moghimi

Physical Science International Journal, Page 1-10
DOI: 10.9734/PSIJ/2016/25255

Aims: This paper reduced total cost of system, generation cost and pollution cost in a proposed HUB (multi carrier energy system) model simultaneously.

Study Design: Model design includes an energy HUB with different characteristics in economic dispatch mode.

Place and Duration of Study: IAU, Iran, November 2014 - February 2016.

Methodology: Scenario model has obtained through DICOPT solver of GAMS software version 24.1.

Results: Using simulation result of the paper, authors have obtained selecting of the best optimal device that has reduced generation cost, pollution cost and total cost.

Conclusion: The paper will be able to get limiting of equipment to unpredictable extra cost that not logged to system (it discusses affect the cost of the system). This paper has developed a hybrid approach for an integrated energy system, ambient temperature and the pollution effects. Therefore, the pollution has saw as output cost of energy HUB. In fact, the pollution has considered as negative yields. Also, the paper has presented optimal scheduling using charging and discharging mechanism equations (effecting of storage) where has reduced by the pollution, the generation and total cost as an objective function in the economic dispatch mode simultaneously.

 

Open Access Original Research Article

Some of the Complexities in the Special Theory of Relativity: New Paradoxes

Sergey Artekha, Andrew Chubykalo, Augusto Espinoza

Physical Science International Journal, Page 1-15
DOI: 10.9734/PSIJ/2016/26788

In this article we analyze some logical contradictions of the special relativity theory (SRT), concerning the time dilation and length contraction. The Lorentz transformations and the relativistic law for velocity addition are considered in detail. The notion of relativity and the transverse Doppler effect are discussed. The whole complex of numerous contradictions proves that the special theory of relativity is the Procrustean bed of physics.

 

Open Access Original Research Article

Bouncing Behavior of Kaluza-Klein Cosmological Model in General Relativity

H. R. Ghate, Atish S. Sontakke, Yogendra D. Patil

Physical Science International Journal, Page 1-9
DOI: 10.9734/PSIJ/2016/24990

Kaluza-Klein cosmological model has been obtained in the general theory of relativity. The source for energy-momentum tensor is assumed a perfect fluid. The field equations have been solved by using a special form of the average scale factor  proposed by Cai et al. [10]. The physical properties and the bouncing behavior of the model are also discussed.

Open Access Original Research Article

Effective Atomic Numbers for Some Alloys at 662 keV Using Gamma Rays Backscattering Technique

Renu Sharma, J. K. Sharma, Tejbir Singh

Physical Science International Journal, Page 1-6
DOI: 10.9734/PSIJ/2016/27243

The gamma backscattering is a useful technique in determining effective atomic number of backscattering material. In gamma backscattering technique there is no direct contact with the detector and material under study. So, in the present work the intensity distribution of backscattered photons was determined both as a function of atomic number of the target  and thickness of the target and then find out the effective atomic number of (Pb-Sn, Pb-Zn and Zn-Sn) alloys at 662 keV. These alloys were synthesized in different compositions of Pb, Sn and Zn elements using melt quenching technique with the help of muffle furnace. The intensity distribution of backscattered photons was recorded with the help of GAMMARAD5 (76 mm x 76 mm NaI(Tl) scintillator detector. The experimental results so obtained were compared with the theoretical ones which were computed using atomic to electronic cross-section method with the help of mass attenuation coefficients database of WinXCom. A good agreement has been observed between theoretical and experimental results of the effective atomic numbers for the selected alloys.