Entropy generation minimization in a channel flow: Application to different advection-diffusion processes and boundary conditions

Avellaneda, J.M.; Bataille, Françoise; Toutant, Adrien; Flamant, Gilles

doi:10.1016/j.ces.2020.115601

Cited by 7 publications

(3 citation statements)

References 41 publications

(59 reference statements)

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“…Zhang et al [ 86 ] established a reaction distillation model of Fetol synthesis and studied the multi-objective optimization problem in the reaction process. Avellaneda et al [ 87 ] carried out multi-objective optimization on the heat and mass transfer process of convective flows in the flow passage. Magnanellia et al [ 88 ] investigated the membrane device to separate carbon dioxide from natural gas, and the research results showed that EGR due to mass transfer in the membrane permeable process could be minimized by controlling the partial pressure and total pressure of the gas components on the permeable side.…”

Section: Introductionmentioning

confidence: 99%

Minimization of Entropy Generation Rate in Hydrogen Iodide Decomposition Reactor Heated by High-Temperature Helium

Kong

Chen

Xia

et al. 2021

Entropy

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The thermochemical sulfur-iodine cycle is a potential method for hydrogen production, and the hydrogen iodide (HI) decomposition is the key step to determine the efficiency of hydrogen production in the cycle. To further reduce the irreversibility of various transmission processes in the HI decomposition reaction, a one-dimensional plug flow model of HI decomposition tubular reactor is established, and performance optimization with entropy generate rate minimization (EGRM) in the decomposition reaction system as an optimization goal based on finite-time thermodynamics is carried out. The reference reactor is heated counter-currently by high-temperature helium gas, the optimal reactor and the modified reactor are designed based on the reference reactor design parameters. With the EGRM as the optimization goal, the optimal control method is used to solve the optimal configuration of the reactor under the condition that both the reactant inlet state and hydrogen production rate are fixed, and the optimal value of total EGR in the reactor is reduced by 13.3% compared with the reference value. The reference reactor is improved on the basis of the total EGR in the optimal reactor, two modified reactors with increased length are designed under the condition of changing the helium inlet state. The total EGR of the two modified reactors are the same as that of the optimal reactor, which are realized by decreasing the helium inlet temperature and helium inlet flow rate, respectively. The results show that the EGR of heat transfer accounts for a large proportion, and the decrease of total EGR is mainly caused by reducing heat transfer irreversibility. The local total EGR of the optimal reactor distribution is more uniform, which approximately confirms the principle of equipartition of entropy production. The EGR distributions of the modified reactors are similar to that of the reference reactor, but the reactor length increases significantly, bringing a relatively large pressure drop. The research results have certain guiding significance to the optimum design of HI decomposition reactors.

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Section: Introductionmentioning

confidence: 99%

Minimization of Entropy Generation Rate in Hydrogen Iodide Decomposition Reactor Heated by High-Temperature Helium

Kong

Chen

Xia

et al. 2021

Entropy

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“…It was reported that entropy rate boosts up subject to higher estimations of Brinkman number while Bejan number declines via same parameter. Few other fruitful studies on entropy generation can be found in previous studies 6–15 …”

Section: Introductionmentioning

confidence: 99%

“…Few other fruitful studies on entropy generation can be found in previous studies. [6][7][8][9][10][11][12][13][14][15] Heat transport in a radiated electrical conducting flow belongs to the most influential class of boundary layer theory problems, and this can be found in numerous industrial and mechanical applications, for example, fire engineering, nuclear reactors, and combustion modeling. In the last couple of decades, engineers and researchers have been carried out examinations on the important characteristics of fluid flow and heat transfer subject to various assumptions.…”

Section: Introductionmentioning

confidence: 99%

Interpretation of entropy generation in Williamson fluid flow with nonlinear thermal radiation and first‐order velocity slip

Qayyum

Khan

Masood

et al. 2020

Math Methods in App Sciences

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This research article investigates the impacts of magnetohydrodynamics (MHD), nonlinear thermal radiation, Darcy‐Forchheimer porous medium, viscous dissipation, first‐order velocity slip, and convective boundary condition on the entropy generation optimization in flow of non‐Newtonian fluid (Williamson fluid) towards a flat and stretchable surface. A general entropy equation is derived for thermal heat irreversibility, porosity irreversibility, Joule heating irreversibility, and fluid friction irreversibility. The bvp4c (built‐in‐shooting) technique is utilized to solve the governing equations for the entropy generation. Our obtained results highlight that enhancement in the thermal radiation and magnetic causes an abrupt change in the entropy generation rate. Moreover, the heat transfer rate and velocity gradient (skin friction) are calculated numerically subject to pertinent parameter, and the results are displayed in tabular form.

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Topology optimization of subsonic compressible flows

Sá

Okubo

Silva

2021

Struct Multidisc Optim

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Entropy generation minimization in a channel flow: Application to different advection-diffusion processes and boundary conditions

Cited by 7 publications

References 41 publications

Minimization of Entropy Generation Rate in Hydrogen Iodide Decomposition Reactor Heated by High-Temperature Helium

Minimization of Entropy Generation Rate in Hydrogen Iodide Decomposition Reactor Heated by High-Temperature Helium

Interpretation of entropy generation in Williamson fluid flow with nonlinear thermal radiation and first‐order velocity slip

Topology optimization of subsonic compressible flows

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