Use of COMSOL in Numerical Study of Thermal Jet with Entropy Generation Concept

2022 ◽  
Author(s):  
Fodil Mohammed el Amine ◽  
Imine Zakaria ◽  
Snoussi Mahi ◽  
Belakhal Djamaa
Keyword(s):  
Entropy Generation ◽  
Numerical Study

scholarly journals Numerical Study On Local Entropy Generation In Compressible Flow Through A Suddenly Expanding Pipe

Entropy ◽  
2005 ◽  
Vol 7 (1) ◽  
pp. 38-67 ◽  
Author(s):  
Hüseyin Yapici ◽  
Nesrin Kayatas ◽  
Nafiz Kahraman ◽  
Gamze Bastürk
Keyword(s):  
Compressible Flow ◽  
Entropy Generation ◽  
Numerical Study ◽  
Local Entropy ◽  
Flow Through ◽  
Local Entropy Generation

Numerical study of asymmetric and axisymmetric thermal jet with entropy generation concept

2021 ◽  
Vol 15 (1) ◽  
pp. 7628-7636
Author(s):  
D. Belakhal ◽  
Kouider Rahmani ◽  
Amel Elkaroui Elkaroui ◽  
Syrine Ben Haj Ayech ◽  
Nejla Mahjoub Saïd ◽  
...  
Keyword(s):  
Entropy Generation ◽  
Numerical Study ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Variable Density ◽  
Current Investigation ◽  
Numerical Resolution ◽  
Different Temperatures ◽  
Density Ratios ◽  
The Impact

In the current investigation, numerical study of a thermal jet of asymmetric (rectangular and elliptical) and axisymmetric (circular) geometry was investigated with variable density to verify the impact of the ratio of density and geometry on the generation of entropy. The central jet was brought to different temperatures (194, 293 and 2110 K) to obtain density ratios (0.66, 1 and 7.2) identical to a mixture jet ((Air-CO2), (Air-Air) and (Air-He)), respectively. Solving the three-dimensional numerical resolution of the Navier Stocks for turbulent flow permanent enclosed on the turbulence model K-εstandard was made. The results acquired are compared with that carried out in previous experimental studies, where it was concluded that, the axisymmetric (circular) geometry increases the entropy generation.

scholarly journals Numerical study of effect of oxygen fraction on local entropy generation in a methane-air burner

Sadhana ◽  
2004 ◽  
Vol 29 (6) ◽  
pp. 641-667 ◽  
Author(s):  
Huseyin Yapici ◽  
Gamze Basturk ◽  
Nesrin Kayatas ◽  
Bilge Albayrak
Keyword(s):  
Entropy Generation ◽  
Numerical Study ◽  
Local Entropy ◽  
Oxygen Fraction ◽  
Effect Of Oxygen ◽  
Local Entropy Generation

Entropy Analysis of Mixed Convective Condensation by Evaluating Fan Velocity With a New Approach

2018 ◽  
Vol 10 (5) ◽  
Author(s):  
Dipanka Bhuyan ◽  
Asis Giri ◽  
Pradip Lingfa
Keyword(s):  
Entropy Generation ◽  
Parallel Plate ◽  
Numerical Study ◽  
Channel Length ◽  
Entropy Analysis ◽  
New Approach ◽  
Central Focus ◽  
Plate Channel ◽  
Convective Condensation ◽  
Velocity Channel

Present paper conducts an extensive numerical study on entropy analysis of mixed convective condensation inside a vertical parallel plate channel. A new approach is proposed to separate pump velocity component/Reynolds number from inlet mixed convection velocity. Influence of inlet governing parameters on condensation heat and mass transfer at different inlet pressure, velocity, channel length, and width are widely studied. The central focus of this paper is to study entropy generation under mixed convective condensation. Variation of local as well as overall entropy generation and second law efficiency for different geometric and environmental conditions are presented. For effective condenser design, present study provides two important correlations of overall volumetric entropy generation due to thermal transport and overall volumetric entropy generation due to mass transport.

scholarly journals Numerical Study of Nanofluid Irreversibilities in a Heat Exchanger Used with an Aqueous Medium

Entropy ◽  
2020 ◽  
Vol 22 (1) ◽  
pp. 86
Author(s):  
Guillermo Efren Ovando-Chacon ◽  
Sandy Luz Ovando-Chacon ◽  
Abelardo Rodriguez-Leon ◽  
Mario Diaz-Gonzalez ◽  
Jorge Arturo Hernandez-Zarate ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Aqueous Medium ◽  
Entropy Generation ◽  
Numerical Study ◽  
Oil Extraction ◽  
Hot Water ◽  
Bejan Number ◽  
Extraction Properties ◽  
And Performance

Heat exchangers play an important role in different industrial processes; therefore, it is important to characterize these devices to improve their efficiency by guaranteeing the efficient use of energy. In this study, we carry out a numerical analysis of flow dynamics, heat transfer, and entropy generation inside a heat exchanger; an aqueous medium used for oil extraction flows through the exchanger. Hot water flows on the shell side; nanoparticles have been added to the water in order to improve heat transfer toward the cold aqueous medium flowing on the tube side. The aqueous medium must reach a certain temperature in order to obtain its oil extraction properties. The analysis is performed for different Richardson numbers (Ri = 0.1–10), nanofluid volume fractions (φ = 0.00–0.06), and heat exchanger heights (H = 0.6–1.0). Results are presented in terms of Nusselt number, total entropy generation, Bejan number, and performance evaluation criterion. Results showed that heat exchanger performance increases with the increase in Ri when Ri > 1 and when reducing H.

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