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MHD mixed convection flow near the stagnation-point on a vertical permeable surface

Ishak, Anuar; Nazar, Roslinda; Bachok, Norfifah; Pop, Ioan - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 1, pp. 40-46

The steady magnetohydrodynamic (MHD) mixed convection boundary layer flow of a viscous and electrically conducting …

Persistent link: https://www.econbiz.de/10010590915

Entropy generation of nanofluid in presence of magnetic field using Lattice Boltzmann Method

Sheikholeslami, Mohsen; Ganji, Davood Domiri - In: Physica A: Statistical Mechanics and its Applications 417 (2015) C, pp. 273-286

In this paper magnetohydrodynamic free convection flow of CuO–water nanofluid in a square enclosure with a rectangular …

Persistent link: https://www.econbiz.de/10011077859

MHD stagnation point flow towards a stretching sheet

Ishak, Anuar; Jafar, Khamisah; Nazar, Roslinda; Pop, Ioan - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 17, pp. 3377-3383

The steady two-dimensional MHD stagnation point flow towards a stretching sheet with variable surface temperature is investigated. The governing system of partial differential equations are transformed into ordinary differential equations, which are then solved numerically using a...

Persistent link: https://www.econbiz.de/10011062556

On the 3-D stochastic magnetohydrodynamic-α model

Deugoué, Gabriel; Razafimandimby, Paul André; Sango, … - In: Stochastic Processes and their Applications 122 (2012) 5, pp. 2211-2248

We consider the stochastic three dimensional magnetohydrodynamic-α model (MHD-α) which arises in the modeling of …. We also discuss the relation of the stochastic 3D MHD-α model to the stochastic 3D magnetohydrodynamic equations by … stochastic 3D MHD-α model converges to a certain weak martingale solution of the stochastic 3D magnetohydrodynamic equations …

Persistent link: https://www.econbiz.de/10011065035

Second law analysis of crossflow heat exchanger in the presence of axial dispersion in one fluid

Gupta, Arun; Das, Sarit K. - In: Energy 32 (2007) 5, pp. 664-672

In the present paper second law analysis of crossflow heat exchangers has been carried out in the presence of non-uniformity of flow. This non-uniformity is modeled with the help of axial dispersion model and takes into account the back mixing and flow maldistribution. An analytical model for...

Persistent link: https://www.econbiz.de/10010808768

Thermodynamic equilibrium model and second law analysis of a downdraft waste gasifier

Jarungthammachote, S.; Dutta, A. - In: Energy 32 (2007) 9, pp. 1660-1669

The management of municipal solid waste (MSW) and the current status of world energy resources crisis are important problems. Gasification is a kind of waste-to- energy conversion scheme that offers the most attractive solution to both waste disposal and energy problems. In this study, the...

Persistent link: https://www.econbiz.de/10010808829

Binary ORC (organic Rankine cycles) power plants for the exploitation of medium–low temperature geothermal sources – Part A: Thermodynamic optimization

Astolfi, Marco; Romano, Matteo C.; Bombarda, Paola; … - In: Energy 66 (2014) C, pp. 423-434

This two-part paper investigates the potential of ORC (organic Rankine cycles) for the exploitation of low-medium enthalpy geothermal brines. Part A deals with thermodynamic analysis and optimization, while Part B focuses on economic optimization.

Persistent link: https://www.econbiz.de/10010808843

Entropy and exergy in irreversible renewable energy systems

Lucia, Umberto - In: Renewable and Sustainable Energy Reviews 20 (2013) C, pp. 559-564

Exergy and entropy generation analysis of the open systems allows to obtain a measure of how far the open real systems deviate from equilibrium with their environment. A link between entropy generation maximum principle and the exergy analysis of engineering and natural systems is suggested in...

Persistent link: https://www.econbiz.de/10010617110

Exergy analysis of lithium bromide/water absorption systems

Şencan, Arzu; Yakut, Kemal A.; Kalogirou, Soteris A. - In: Renewable Energy 30 (2005) 5, pp. 645-657

losses are less than those of the generator and absorber. This is due to the heat of mixing in the solution, which is not …

Persistent link: https://www.econbiz.de/10011046052

Molar exergy and flow exergy of pure chemical fuels

Zanchini, Enzo; Terlizzese, Tiziano - In: Energy 34 (2009) 9, pp. 1246-1259

Expressions of the molar exergy and of the molar flow exergy of a pure chemical fuel are deduced rigorously from the basic principles of thermodynamics. It is shown that molar exergy and molar flow exergy coincide when the temperature T and the pressure p of the fuel are equal to the temperature...

Persistent link: https://www.econbiz.de/10011054320