Year 2017, Volume 20, Issue 4, Pages 200 - 208 2017-11-29

Entropy generation in Rayleigh-Bénard problem for different geometrical cavities

Omar Al-Abbasi [1]

155 183

Entropy generation for the natural convection phenomena is studied for different geometrical cavities that have identical boundary conditions and unit area. The key characteristic parameter in this study was the Grashof number. The effect of Grashof number on Nusselt number and entropy generation has been studied using finite element method. The developed models in this study were validated against published work in the literature and results were found to be in close agreement. Entropy generation was found to increase with an increase in the Grashof number and the heat transfer was the dominant factor in increasing the entropy generation. A lower entropy generation is generally expected with an increase in the distance between the hot and cold boundaries. It is also noted that the rate of entropy generation decreases slowly when the flow domain is only slightly distorted, while the rate of entropy generation increases sharply when the flow domain changes significantly.  

Rayleigh-Bénard, entropy generation, heat transfer
  • 1. Magherbi M, Abbassi H, Ben Brahim A. Entropy generation at the onset of natural convection. International Journal of Heat and Mass Transfer 2003; 46:3441-3450.
  • 2. Lam PAK, Arul Prakash K. A numerical study on natural convection and entropy generation in a porous enclosure with heat sources. International Journal of Heat and Mass Transfer 2014; 69:390-407.
  • 3. Famouri M, Hooman K. Entropy generation for natural convection by heated partitions in a cavity. International Communications in Heat and Mass Transfer 2008; 35:492-502.
Subjects Engineering
Journal Section Regular Original Research Article
Authors

Author: Omar Al-Abbasi
Institution: University of Bahrain
Country: Bahrain


Dates

Publication Date: November 29, 2017

Bibtex @research article { ijot314253, journal = {International Journal of Thermodynamics}, issn = {1301-9724}, eissn = {2146-1511}, address = {Uluslararası Uygulamalı Termodinamik Derneği İktisadi İşletmesi}, year = {2017}, volume = {20}, pages = {200 - 208}, doi = {10.5541/eoguijt.314253}, title = {Entropy generation in Rayleigh-Bénard problem for different geometrical cavities}, key = {cite}, author = {Al-Abbasi, Omar} }
APA Al-Abbasi, O . (2017). Entropy generation in Rayleigh-Bénard problem for different geometrical cavities. International Journal of Thermodynamics, 20 (4), 200-208. DOI: 10.5541/eoguijt.314253
MLA Al-Abbasi, O . "Entropy generation in Rayleigh-Bénard problem for different geometrical cavities". International Journal of Thermodynamics 20 (2017): 200-208 <http://dergipark.org.tr/ijot/issue/32334/314253>
Chicago Al-Abbasi, O . "Entropy generation in Rayleigh-Bénard problem for different geometrical cavities". International Journal of Thermodynamics 20 (2017): 200-208
RIS TY - JOUR T1 - Entropy generation in Rayleigh-Bénard problem for different geometrical cavities AU - Omar Al-Abbasi Y1 - 2017 PY - 2017 N1 - doi: 10.5541/eoguijt.314253 DO - 10.5541/eoguijt.314253 T2 - International Journal of Thermodynamics JF - Journal JO - JOR SP - 200 EP - 208 VL - 20 IS - 4 SN - 1301-9724-2146-1511 M3 - doi: 10.5541/eoguijt.314253 UR - https://doi.org/10.5541/eoguijt.314253 Y2 - 2017 ER -
EndNote %0 International Journal of Thermodynamics Entropy generation in Rayleigh-Bénard problem for different geometrical cavities %A Omar Al-Abbasi %T Entropy generation in Rayleigh-Bénard problem for different geometrical cavities %D 2017 %J International Journal of Thermodynamics %P 1301-9724-2146-1511 %V 20 %N 4 %R doi: 10.5541/eoguijt.314253 %U 10.5541/eoguijt.314253
ISNAD Al-Abbasi, Omar . "Entropy generation in Rayleigh-Bénard problem for different geometrical cavities". International Journal of Thermodynamics 20 / 4 (November 2017): 200-208. https://doi.org/10.5541/eoguijt.314253
AMA Al-Abbasi O . Entropy generation in Rayleigh-Bénard problem for different geometrical cavities. International Journal of Thermodynamics. 2017; 20(4): 200-208.
Vancouver Al-Abbasi O . Entropy generation in Rayleigh-Bénard problem for different geometrical cavities. International Journal of Thermodynamics. 2017; 20(4): 208-200.