SavedAdd your journal

Journals / Makine Teknolojileri Elektronik Dergisi (elektronik) / 2015 / Cilt: 12 - Sayı: 4

The Numerical Investigation Of Effect Of Various Obstacles On Heat Transfer Enhancement

ÇEŞİTLİ ENGELLERİN ISI TRANSFERİ İYİLEŞTİRME ÜZERİNE ETKİSİNİN SAYISAL OLARAK İNCELENMESİ

NEHİR TOKGÖZ
Seda ÖZTIRAK
COŞKUN ÖZALP
ÖNDER KAŞKA
Pages
85–93
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The most effective heat transfer enhancement is determined that at low Reynolds number and triangular obstacle.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The aim of this study is to determine the effect of the obstacles on the heat transfer and pressure drop with assuming hydrodynamic fully developed turbulent flow and constant heat flux boundary conditions numerically.
📊
Key Findings & Data:The whole study has been conducted for Reynolds numbers in the range of 10000≤Re≤20000.
💡
Conclusion & Impact:The most effective heat transfer enhancement is determined that at low Reynolds number and triangular obstacle.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The aim of this study is to determine the effect of the obstacles on the heat transfer and pressure drop with assuming hydrodynamic fully developed turbulent flow and constant heat flux boundary conditions numerically. The whole study has been conducted for Reynolds numbers in the range of 10000≤Re≤20000. The governing equations are solved numerically by means of the finite volume method. In numerical calculations, standard k-ε turbulent model was utilized. As a result of numerical studies, Nusselt number Nu, friction factor f, and efficiency index η were calculated for different corrugated channel geometries. The results obtained previously in the literature [14] were compared with the study, it can be seen that results comply with other results. The most effective heat transfer enhancement is determined that at low Reynolds number and triangular obstacle.

Özet

Bu çalışmada kanal içerisine yerleştirilen çeşitli engellerin ısı transferi ve basınç düşümü karakteristikleri üzerine etkisi, hidrodinamik olarak tam gelişmiş türbülanslı akış ve sabit ısı akısı sınır şartları varsayılarak sayısal olarak incelenmiştir. Çalışma 10000≤Re≤20000 aralığında yapılmıştır. Yapılan analizlerde sonlu hacimler yöntemi kullanarak çözüm yapan paket program kullanılmıştır. Sayısal hesaplamada standart k-ε metodu kullanılmıştır. Analizler sonucunda ortalama Nusselt sayısı Nu, sürtünme katsayısı f ve toplam ısı transferi iyileştirme faktörü η hesaplanmıştır. Elde edilen sonuçlar daha önce literatürde[14] yapılan çalışmayla mukayese edilmiş, sonuçların uyumlu olduğu gözlemlenmiştir. En etkili ısı transferi iyileştirme oranının düşük Reynolds sayılarında ve üçgen engelde olduğu belirlenmiştir.

🔖

Cite This Article

TOKGÖZ, N., ÖZTIRAK, S., ÖZALP, C., KAŞKA, Ö. (2015). The Numerical Investigation Of Effect Of Various Obstacles On Heat Transfer Enhancement. Makine Teknolojileri Elektronik Dergisi (elektronik), Cilt: 12 - Sayı: 4, 85–93. https://ajindex.com/articles/282000

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (14)

  1. Bergles, A.E., Augmentation of Heat Transfer. Heat Exchanger Design Handbook. Hemisphere Publishing Co., Washington DC. 1983
  2. Karwa R, Solanki SC, Saini JS., Heat transfer coefficient and friction factor correlations for the transitional flow regime in rib-roughened rectangular ducts. Int J Heat Mass Transf 42(9):1597– 1615,1999
  3. Ceylan K, Kelbaliyev G., The roughness effects on friction and heat transfer in the fully developed turbulent flow in pipes. Appl Therm Eng 23(5):557, 2003
  4. Dalle Donne M, Meyer L., Turbulent convective heat transfer from rough surfaces with twodimensional rectangular ribs. Int J Heat Mass Transf 20:583–62, 1977
  5. Kakac S, Shah RK, Aung W., Handbook of single-phase convective heat transfer. Wiley Interscience, New York, 1987
  6. Nakamura, H., Igarashi,T. and Tsutsui, T., Local Heat Transfer Around a Wall-Mounted Cube at 45o to Flow in a Turbulent Boundary Layer, International Journal of Heat and Fluid Flow, 24: 807–815, 2003
  7. Hong YM, Hsieh SS., Heat transfer and friction factor measurement in ducts with staggered and inline ribs. J Heat Transfer 115:58–65,1993
  8. Bilen K., Cetin M., Gul H., Balta T., The investigation of groove geometry effect on heat transfer for internally grooved tubes. Appl Therm Eng 29:753–761,2009
  9. Jaurker AR, Saini JS, Gandhi BK.,Heat transfer and friction characteristics of rectangular solar air heater duct using rib–grooved artificial roughness. Sol Energy 80:895–907, 2006
  10. Lorenz S, Mukomilow D, Leiner W., Distribution of the heat transfer coefficient in a channel with periodic transverse grooves. Exp Thermal Fluid Sci 11:234–242, 1995
  11. Webb RL, Eckert ERG, Goldstein RJ., Heat transfer and friction in tubes with repeated-rib roughness. Int J Heat Mass Transf 14:601–617, 1971
  12. Sparrow EM, Koram KK, Charmchi M., Heat transfer and pressure drop characteristics induced by a slat blockage in a circular tube. J Heat Transfer 102:64–70, 1980
  13. Meinders, E. R. and Hanjalic, K., Experimental Study of the Convective Heat Transfer form In-line and Staggered Configurations of Two Wall-Mounted Cubes, International Journal of Heat and Mass Transfer, 45: 465-482, 2002
  14. Ramadhan, Abdulmajeed A.; Al Anii, Yaser T.; Shareef, Amer J.(2013), Groove geometry effects on turbulent heat transfer and fluid flow, Heat and Mass Transfer, Volume 49, Issue 2, pp.185-195 15. Fluent 6.3 User’s Guide, 2005.