SavedAdd your journal

Journals / Isı Bilimi ve Tekniği Dergisi / 2017 / Cilt: 37 - Sayı: 2 (40. Yıl Özel Baskı)

NUMERICAL INVESTIGATION OF BUOYANCY DRIVEN HEAT TRANSFER OF WATER-BASED CuO NANOFLUIDS IN A RECTANGULAR ENCLOSURE WITH AN OFFCENTER SOLID CONDUCTING BODY

MERKEZ DIŞI KATI İLETKEN BİR CİSİM İÇEREN DİKDÖRTGEN KAPALI BİR ORTAMDA SU BAZLI CuO NANOAKIŞKANLAR İÇİN KALDIRMA KUVVETİ ETKİLİ ISI TRANSFERİNİN NÜMERİK İNCELENMESİ

Çiğdem SUSANTEZ
Kamil KAHVECİ
Pages
109–127
Publication Date
2022-10-18
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)

Finally, results show that heat transfer rate gets its highestvalue for square enclosure case for high values of Rayleigh number.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Abstract: In this study, buoyancy driven heat transfer of water-based CuO nanofluid in a rectangular enclosure with asolid cylinder was investigated numerically for different values of aspect ratio, location and diameter of solid cylinder,solid volume fraction and Rayleigh number.
📊
Key Findings & Data:Resultsshow that heat transfer rate increases considerably with an increase in the Rayleigh number and solid volume fractionand with a decrease in the solid cylinder diameter.
💡
Conclusion & Impact:Finally, results show that heat transfer rate gets its highestvalue for square enclosure case for high values of Rayleigh number.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Abstract: In this study, buoyancy driven heat transfer of water-based CuO nanofluid in a rectangular enclosure with asolid cylinder was investigated numerically for different values of aspect ratio, location and diameter of solid cylinder,solid volume fraction and Rayleigh number. While bottom and upper walls of enclosure are adiabatic, sidewalls areisothermal. Thermal conductivity of solid cylinder was assumed to be equal to that of the base fluid. Governingequations were solved numerically by Comsol Multiphysics finite element modeling and simulation software. Resultsshow that heat transfer rate increases considerably with an increase in the Rayleigh number and solid volume fractionand with a decrease in the solid cylinder diameter. Results also show that heat transfer rate shows an increase with anincrease of aspect ratio for low values of Rayleigh number. Finally, results show that heat transfer rate gets its highestvalue for square enclosure case for high values of Rayleigh number.

Özet

Bu çalışmada, katı bir silindir içeren dikdörtgensel kapalı bir ortamda su bazlı CuO nanoakışkanlar için kaldırma kuvveti etkili ısı transferi farklı yükseklik genişlik oranı, katı silindirin yeri ve çapı, nanoparçacık hacim oranı ve Rayleigh sayısı değerleri için nümerik olarak incelenmiştir. Kapalı ortamın alt ve üst duvarları adyabatik iken, yan duvarları izotermaldir. Silindirin ısı iletim katsayısının baz akışkanınkine eşit olduğu varsayılmıştır. Yönetici denklemler Comsol Multiphysics sonlu eleman modelleme ve simülasyon yazılımı kullanılarak nümerik olarak çözülmüştür. Sonuçlar, ısı transferinin Rayleigh sayısı ve nanoparçacık hacim oranının artışı ve katı silindir çapının düşüşü ile önemli ölçüde arttığını göstermiştir. Sonuçlar aynı zamanda Rayleigh sayısının düşük değerleri için ısı transferinin yükseklik genişlik oranının artışı ile arttığını göstermiştir. Sonuçlar ayrıca ısı transferinin en yüksek değerlerini Rayleigh sayısının yüksek değerleri ve karesel kapalı ortam durumu için aldığını göstermiştir.

🔖

Cite This Article

SUSANTEZ, Ç., KAHVECİ, K. (2022). NUMERICAL INVESTIGATION OF BUOYANCY DRIVEN HEAT TRANSFER OF WATER-BASED CuO NANOFLUIDS IN A RECTANGULAR ENCLOSURE WITH AN OFFCENTER SOLID CONDUCTING BODY. Isı Bilimi ve Tekniği Dergisi, Cilt: 37 - Sayı: 2 (40. Yıl Özel Baskı), 109–127. https://ajindex.com/articles/542501

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (5)

  1. Yu Z. T., Xu X., Hu Y. C., Fan L. W. and Cen K. F., 2011, Numerical Study of Transient Buoyancy-Driven Convective Heat Transfer of Water-Based Nanofluids in a Bottom-Heated Isosceles Triangular Enclosure, Int. J. Heat Mass Transfer, 54(1-3), 526–532. Yu W., and Choi S. U. S., 2003, The Role of Interfacial Layers in the Enhanced Thermal Conductivity of Nanofluids: A Renovated Maxwell Model, J. Nanopart. Res., 5(1), 167–171. Xuan Y. and Li Q., 2003, Investigation on Convective Heat Transfer and Flow Features of Nanofluids, J. Heat Transfer, 125(1), 151–155. Xuan Y. and Li Q., 2000, Heat Transfer Enhancement of Nanofuids, Int. J. Heat Fluid Flow, 21(1), 58–64. Wong K. V. and Leon O., 2010, Applications of Nanofluids: Current and Future (Review Article), Advances in Mechanical Engineering, 2, 1-11.
  2. Wang X., Xu X. and Choi S. U. S., 1999, Thermal Conductivity of Nanoparticle–Fluid Mixture, J. Thermophys Heat Transfer, 13(4), 474–480.
  3. Susantez Ç., Kahveci K., Cihan A. and Hacihafızoğlu O. 2012, Natural Convection of Water-Based CuO Nanofluids in an Enclosure with a Heat Conducting Solid Circular Cylinder at the Center. 6 th International Ege Energy Symposium & Exhibition, İzmir, 653-664.
  4. Rahman M. M., Billah M. M., Rahman A. T. M. M., Kalam M. A., Ahsan A., 2011, Numerical Investigation of Heat Transfer Enhancement of Nanofluids in an Inclined Lid-Driven Triangular Enclosure, Int. Commun. Heat Mass Transfer, 38(10), 1360–1367. Pak B.C. and Cho Y. I., 1998, Hydrodynamic and Heat Transfer Study of Dispersed Fluids with Submicron Metallic Oxide Particles, Exp. Heat Transfer, 11(2), 151– 170. Oztop H. F. and Abu-Nada E., 2008, Numerical Study of Natural Convection in Partially Heated Rectangular Enclosures Filled with Nanofluids, Int. J. Heat Fluid Flow, 29(5), 1326–1336.
  5. Murshed S. M. S., Leong K.C. and Yang C., 2009, A Combined Model for the Effective Thermal Conductivity of Nanofluids, Appl. Therm. Eng., 29(11-12), 2477– 2483. Murshed S. M. S., Leong K.C. and Yang C., 2008, Investigations of Thermal Conductivity and Viscosity of Nanofluids, Int. J. Therm. Sci., 47(5), 560–568. Maxwell J. C., 1873, A Treatise on Electricity and Magnetism (Vol.II), Clarendon Press, Oxford, 54. Li C. H. and Peterson G. P., 2006, Experimental Investigation of Temperature and Volume Fraction Variations on the Effective Thermal Conductivity of Nanoparticle Suspensions (Nanofluids), J. Appl. Phys., 99(8), 084314. Lai F. H. and Yang Y. T., 2011, Lattice Boltzmann Simulation of Natural Co