Documents disponibles écrits par cet auteur

Diffusion-thermo effects on free convective heat and mass transfer flow in a vertical channel with symmetric boundary conditions / Basant K. Jha in Journal of heat transfer, Vol. 133 N° 5 (Mai 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 5 (Mai 2011) . - pp. [052502/1-8] Titre : Diffusion-thermo effects on free convective heat and mass transfer flow in a vertical channel with symmetric boundary conditions Type de document : texte imprimé Auteurs : Basant K. Jha, Auteur ; Abiodun O. Ajibade, Auteur Année de publication : 2011 Article en page(s) : pp. [052502/1-8] Note générale : Physique Langues : Anglais (eng) Mots-clés : Free  convection  Diffusion-thermo  Mass  flux  Vertical  channel  Symmetric  boundary  conditions Index. décimale : 536 Chaleur. Thermodynamique Résumé : This article investigates the influence of diffusion-thermo effect on transient free convective heat and mass transfer flow in a channel bounded by two infinite vertical parallel plates. Fully developed laminar flow is considered when the boundaries are subjected to symmetric concentration and thermal input. The Dufour effect is taken into consideration. The velocity, temperature, and concentration profiles are obtained analytically using the Laplace transforms technique and used to compute the shear stress, Nusselt number, and mass flux. During the course of computation, it was found that transient solution at large time coincides with steady-state solution derived separately. Diffusion-thermo (Dufour effect) is observed to create an anomalous situation in temperature and velocity profiles for small Prandtl numbers. There is also flow reversal for a small Dufour number and negative values of the sustentation parameter (N). At steady-state, there is neither heat nor mass transfer between the fluid and the plates. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Diffusion-thermo effects on free convective heat and mass transfer flow in a vertical channel with symmetric boundary conditions [texte imprimé] / Basant K. Jha, Auteur ; Abiodun O. Ajibade, Auteur . - 2011 . - pp. [052502/1-8]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 5 (Mai 2011) . - pp. [052502/1-8] Mots-clés : Free  convection  Diffusion-thermo  Mass  flux  Vertical  channel  Symmetric  boundary  conditions Index. décimale : 536 Chaleur. Thermodynamique Résumé : This article investigates the influence of diffusion-thermo effect on transient free convective heat and mass transfer flow in a channel bounded by two infinite vertical parallel plates. Fully developed laminar flow is considered when the boundaries are subjected to symmetric concentration and thermal input. The Dufour effect is taken into consideration. The velocity, temperature, and concentration profiles are obtained analytically using the Laplace transforms technique and used to compute the shear stress, Nusselt number, and mass flux. During the course of computation, it was found that transient solution at large time coincides with steady-state solution derived separately. Diffusion-thermo (Dufour effect) is observed to create an anomalous situation in temperature and velocity profiles for small Prandtl numbers. There is also flow reversal for a small Dufour number and negative values of the sustentation parameter (N). At steady-state, there is neither heat nor mass transfer between the fluid and the plates. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]

Transient pressure-driven flow in interface region between a uniform porous medium and a clear fluid in parallel-plate with suction/injection / M. L. Kaurangini in International journal of management science and engineering management, Vol. 5 N° 1 (Fevrier 2010) 

Public ISBD [article]  in International journal of management science and engineering management > Vol. 5 N° 1 (Fevrier 2010) . - pp.15-23 Titre : Transient pressure-driven flow in interface region between a uniform porous medium and a clear fluid in parallel-plate with suction/injection Type de document : texte imprimé Auteurs : M. L. Kaurangini, Auteur ; Basant K. Jha, Auteur Année de publication : 2011 Article en page(s) : pp.15-23 Note générale : Management Langues : Anglais (eng) Mots-clés : Transient  Suction  Injection  Composite  channel  Porous  media Résumé : In this paper, solutions for the transient flow fully developed laminar fluid flow in the parallel-plates partially filled with a uniform porous medium and partially with a clear fluid are presented in the presence of suction/injection using numerical technique. The Brinkman-extended Darcy equation is utilized to model the flow in the porous region. The solutions account for the boundary effects and for the stress jump boundary condition at the interface recently suggested by Ochoa-Tapia and Whitaker (1995) [15, 16] and also reported by Alazmi and Vafai (2001) [5]. The dependence of the velocity on the Pressure gradient, the adjustable coefficient in the stress jump boundary conditions, porous medium and suction/injection are investigated. It is shown that accounting for a jump in the shear stress at the interface and suction are essentially influence velocity profiles. It is also observed that the unsteady velocity coincides with the steady state velocity at large value of time. DEWEY : 658 ISSN : 1750-9653 En ligne : http://www.ijmsem.org/OnlineJournal.do/?118.html [article] Transient pressure-driven flow in interface region between a uniform porous medium and a clear fluid in parallel-plate with suction/injection [texte imprimé] / M. L. Kaurangini, Auteur ; Basant K. Jha, Auteur . - 2011 . - pp.15-23. Management Langues : Anglais (eng) in International journal of management science and engineering management > Vol. 5 N° 1 (Fevrier 2010) . - pp.15-23 Mots-clés : Transient  Suction  Injection  Composite  channel  Porous  media Résumé : In this paper, solutions for the transient flow fully developed laminar fluid flow in the parallel-plates partially filled with a uniform porous medium and partially with a clear fluid are presented in the presence of suction/injection using numerical technique. The Brinkman-extended Darcy equation is utilized to model the flow in the porous region. The solutions account for the boundary effects and for the stress jump boundary condition at the interface recently suggested by Ochoa-Tapia and Whitaker (1995) [15, 16] and also reported by Alazmi and Vafai (2001) [5]. The dependence of the velocity on the Pressure gradient, the adjustable coefficient in the stress jump boundary conditions, porous medium and suction/injection are investigated. It is shown that accounting for a jump in the shear stress at the interface and suction are essentially influence velocity profiles. It is also observed that the unsteady velocity coincides with the steady state velocity at large value of time. DEWEY : 658 ISSN : 1750-9653 En ligne : http://www.ijmsem.org/OnlineJournal.do/?118.html