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transfer-phenomenon
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Enhancing energy transfer in quantum systems via periodic driving: Floquet master equations
, Article Physical Review A ; Volume 105, Issue 1 , 2022 ; 24699926 (ISSN) ; Rezakhani, A. T ; Sharif University of Technology
American Physical Society
2022
Abstract
We provide a comprehensive study of the energy-transfer phenomenon - populating a given energy level - in three- and four-level quantum systems coupled to two thermal baths. In particular, we examine the effects of an external periodic driving and the coherence induced by the baths on the efficiency of the energy transfer. We consider the Floquet-Lindblad and the Floquet-Redfield scenarios, which both are in the Born-Markov, weak-coupling regime but differ in the treatment of the secular approximation, and for the latter we develop an appropriate Floquet-type master equation by employing a partial secular approximation. Throughout the whole analysis we keep Lamb-shift corrections in the...
Simulation analysis of MHD hybrid Cu-Al2O3/H2O nanofluid flow with heat generation through a porous media
, Article International Journal of Energy Research ; Volume 45, Issue 13 , 2021 , Pages 19165-19179 ; 0363907X (ISSN) ; Ahmad, S ; Nisar, K. S ; Faridi, A. A ; Ashraf, M ; Sharif University of Technology
John Wiley and Sons Ltd
2021
Abstract
Hybrid nanoliquids comprise of better physical strength, mechanical resistance, thermal conductivity, and chemical stability as equated to individual nanoliquids. The present work investigates the MHD laminar flow, containing hybrid nanoparticles, with heat transfer phenomenon over a stretching sheet immersed in a porous medium. The effect of induced magnetic field has also been taken into account. The flow model PDEs are rehabilitated into ordinary ones using a persuasive tool of similarity variables. The analogous system of dimensionless equations alongside the boundary conditions is numerically treated with the Successive-Over-Relaxation (SOR) technique. Flow and heat transfer aspects of...
Simulation analysis of MHD hybrid Cu-Al2O3/H2O nanofluid flow with heat generation through a porous media
, Article International Journal of Energy Research ; Volume 45, Issue 13 , 2021 , Pages 19165-19179 ; 0363907X (ISSN) ; Ahmad, S ; Nisar, K. S ; Faridi, A. A ; Ashraf, M ; Sharif University of Technology
John Wiley and Sons Ltd
2021
Abstract
Hybrid nanoliquids comprise of better physical strength, mechanical resistance, thermal conductivity, and chemical stability as equated to individual nanoliquids. The present work investigates the MHD laminar flow, containing hybrid nanoparticles, with heat transfer phenomenon over a stretching sheet immersed in a porous medium. The effect of induced magnetic field has also been taken into account. The flow model PDEs are rehabilitated into ordinary ones using a persuasive tool of similarity variables. The analogous system of dimensionless equations alongside the boundary conditions is numerically treated with the Successive-Over-Relaxation (SOR) technique. Flow and heat transfer aspects of...