Korean Chemical Engineering Research

  • 제52권3호
  • /
  • Pages.294-301
  • /
  • 2014
  • /
  • 0304-128X(pISSN)
  • /
  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
권호 표지
DOI QR코드

DOI QR Code

Entropy Generation Analysis for Various Cross-sectional Ducts in Fully Developed Laminar Convection with Constant Wall Heat Flux

  • Haghgooyan, M.S. (Department of Mechanical Engineering, Islamic Azad University-South branch) ;
  • Aghanajafi, C. (Department of Mechanical Engineering, K.N. Toosi University of Technology)
  • 투고 : 2013.12.07
  • 심사 : 2014.03.19
  • 발행 : 2014.06.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This study focuses on analysis and comparison of entropy generation in various cross-sectional ducts along with fully developed laminar flow and constant uniform wall heat flux. The obtained results were compared in ducts with circular, semicircular, and rectangular with semicircular ends, equilateral triangular, and square and symmetrical hexagonal cross-sectional areas. These results were separately studied for aspect ratio of different rectangular shapes. Characteristics of fluid were considered at average temperature between outlet and inlet ducts. Results showed that factors such as Reynolds number, cross section, hydraulic diameter, heat flux and aspect ratio were effective on entropy generation, and these effects are more evident than heat flux and occur more in high heat fluxes. Considering the performed comparisons, it seems that semicircular and circular cross section generates less entropy than other cross sections.

키워드

참고문헌

  1. Bejan, A., Int. J. Heat Transfer, 99, 374-380(1977). https://doi.org/10.1115/1.3450705
  2. Sahin, A. Z., Int. J. Heat Mass Transfer, 42, 1-11(2005). https://doi.org/10.1007/s00231-005-0637-6
  3. Ou, J. W. and Cheng, K. C., Am Soc Mech Eng Pap, 74, HT-50(1974).
  4. Nag, P. K. and Mukherjee, P., Int. J. Heat Mass Transfer, 30, 401-405(1987). https://doi.org/10.1016/0017-9310(87)90128-1
  5. Shah, R. K. and London, A. L., Laminar Flow Forced Convection in Ducts, Academic Press (1978).
  6. Ozotop, H. F., Int. J. Heat and Mass Transfer, 32, 266-274(2005). https://doi.org/10.1016/j.icheatmasstransfer.2004.05.018
  7. Falahat, A. R., Int. J. Elixir Mech. Eng., 42, 6135-6138(2012).
  8. Jankowski, T. D., Int. J. Heat and Mass Transfer, 52, 3439-3445 (2009). https://doi.org/10.1016/j.ijheatmasstransfer.2009.03.016
  9. Jarungthammachote, S. P., Int. J. Energy, 35, 5374-5379(2010). https://doi.org/10.1016/j.energy.2010.07.020
  10. Vandadi, V. and Aghanajafi, C., Journal of Mechanics, 28(1), March(2012).
  11. Aghanajafi, C. and Mansourizadeh, M., J. Fusion Energy, 26, 299-305(2007). https://doi.org/10.1007/s10894-007-9084-3
  12. Langeroudi, H. G. and Aghanajafi, C., J. Fusion Energy, 25, No. 3/4(2006).
  13. Langeroudi, H. G. and Aghanajafi, C. J. Fusion Energy, 25, No. 3/4(2006).
  14. Satapathy, A. K., J Energy, 34, 1122e6(2009).
  15. Hong, S. W. and Bergles, A. E., Int. J. Heat Mass Transfer, 19, 123(1976). https://doi.org/10.1016/0017-9310(76)90021-1
  16. Haddad, O. M., Alkam, M. K. and Khasawneh, M. T., Int. J. Energy, 29, 35-55(2004). https://doi.org/10.1016/S0360-5442(03)00156-7