SavedAdd your journal

Journals / Tesisat Mühendisliği / 2018 / Cilt: 2018 - Sayı: 168

Computational Investigation of the Velocity and Temperature Fields in Corrugated Heat Exchanger Channels using RANS based Turbulence Models with Experimental Validation

Dalgalı Yüzeyli Isı Değiştirici Kanallarında Hız ve Sıcaklık Alanlarının “Rans” Tabanlı Türbülans Modelleri ile Sayısal İncelenmesi ve Deneysel Doğrulaması

Erman ASLAN
İmdat TAYMAZ
Yaşar İSLAMOĞLU
İ. Cem PARMAKSIZOĞLU
Mardiros ENGİN
İlkay ÇOLPAN
Gökhan KARABAŞ
Güven ÖZÇELİK
Pages
25–39
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 best agreement with the experimental data is provided by the SST model, whereas the least accurate results are obtained by the realizable k-ε model.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The characteristics of convective heat transfer and friction factor for a periodic corrugated channel extensively used in compact heat exchangers have been investigated numerically.
📊
Key Findings & Data:Studies were conducted for air flow conditions where contact angle is 30°.
💡
Conclusion & Impact:The best agreement with the experimental data is provided by the SST model, whereas the least accurate results are obtained by the realizable k-ε model.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The characteristics of convective heat transfer and friction factor for a periodic corrugated channel extensively used in compact heat exchangers have been investigated numerically. In numerical study Finite Volume Method (FVM) was used. Four different Reynolds Averaged Navier-Stokes (RANS) based turbulent models, namely the realizable k-ε, k-ω, Shear Stress Transport (SST) and transition SST models are used and compared with each other within RANS formulation. Experimental results which are get from previous study used for validation the numerical results. Studies were conducted for air flow conditions where contact angle is 30°. The Reynolds number is varied from 2.000 to 11.000, while keeping the Prandtl number constant at 0,70. Nusselt number, Colburn factor, friction factor, and goodness factor against Reynolds number have been studied. The effects of the corrugation geometry and channel height have been discussed. The best agreement with the experimental data is provided by the SST model, whereas the least accurate results are obtained by the realizable k-ε model.

Özet

Levhalı ısı değiştiricilerinde yaygın olarak kullanılan periyodik dalgalı yüzeyli kanal için taşınımla ısı geçişi ve sürtünme faktörü sayısal incelenmiştir. Sayısal çalışmada Sonlu Hacimler Yöntemi (Finite Volume Method-FVM) kullanılmıştır. Realize edilebilir k-ε (Realizable k-ε), k-ω, Kayma Gerilmesi Taşınımı (Shear Stress Transport-SST) ve geçiş SST (transition SST) olarak adlandırılan, dört farklı Reynolds Ortalamalı Navier-Stokes (Reynolds Averaged Navier-Stokes Simulations-RANS) tabanlı türbülans modelleri kullanılarak elde edilen sonuçlar karşılaştırılmıştır.Önceki deneysel çalışmalardan elde edilen sonuçlar da sayısal sonuçları doğrulamak için kullanılmıştır. Çalışmalar, dalga eğim açısının 30° olduğu dalgalı yüzeyli kanallarda hava akışı için yapılmıştır. Prandtl sayısı 0,70 sabit kalırken, Reynolds sayısı 2.000 ile 11.000 arasında değiştirilmiştir. Nusselt sayısı, Colburn faktörü, sürtünme faktörü ve ısı geçişi iyileştirme performansı Reynolds sayısına bağlı olarak verilmiştir.Dalgalı yüzeyli geometrinin ve kanal yüksekliğinin etkileri ele alınmıştır. Deneysel ve sayısal sonuçlar arasında en iyi uyum SST modeli ile sağlanırken, en çok hata ise realize edilebilir k-ε modelden elde edilmiştir.

🔖

Cite This Article

ASLAN, E., TAYMAZ, İ., İSLAMOĞLU, Y., PARMAKSIZOĞLU, İ. C., ENGİN, M., ÇOLPAN, İ., KARABAŞ, G., ÖZÇELİK, G. (2018). Computational Investigation of the Velocity and Temperature Fields in Corrugated Heat Exchanger Channels using RANS based Turbulence Models with Experimental Validation. Tesisat Mühendisliği, Cilt: 2018 - Sayı: 168, 25–39. https://ajindex.com/articles/364974

References (13)

  1. KAYNAKÇA Webb, R. L., “Principles Of Enhances Heat Transfer”, Wiley, New York, 1994.
  2. Kuppan, T., “Heat Exchanger Desing Handbook”, Marcel Dekker Inc., New York, 2000.
  3. Elshafei, E. A. M., Awad, E., El-Negiry, E., Ali, A. G., “Heat Transfer And Pressure Drop In Corrugated Channels”, Energy, Cilt 35, Sayfa 101-110, 2010.
  4. Sparrow, E. M., Hossfeld, L. M., “Effect Of Rounding Of Protruding Edges On Heat Transfer And Pressure Drop In A Duct”, International Journal Of Heat And Mass Transfer, Cilt 27, Sayfa 1715-1723, 1984.
  5. Synder, B., Li, K. T., Wirtz, R. A., “Heat Transfer Enhancement In A Serpentine Channel”, International Journal Of Heat And Mass Transfer, Cilt 36, Sayfa 1965-2976, 1983. Bi̇len, K., Çeti̇n, M., Gül, H., Balta, T., “The Investigation Of Groove Geometry Effect On Heat Transfer For Internally Grooved Tubes”, Applied Thermal Engineering, Cilt 29, Sayfa 753-761, 2009.
  6. Nilpueng, K., Wongwises, S., “Flow Pattern And Pressure Drop Of Vertical Upward Gas Liquid Flow In Sinusoidal Wavy Channels”, Experimental Thermal And Fluid Sence, Cilt 30, Sayfa 523-534, 2006.
  7. Ciofalo, M., Stasiek, J., Collins, M. W., “Flow And Heat Transfer In Corrugated Passages: Direct And Large Eddy Simulation And Comparison With Experimental Results”, Proc Of 2nd International Symposiums On Engineering Turbulence Modelling And Measurements, Floransa, İtalya, Sayfa 283-292, 1993.
  8. Zhang, G., Tian, M., “Simulation And Analysis Of Flow Pattern In Cross-Corrugated Plate Heat Exchangers”, Journal Of Hydrodynamics, Ser. B., Cilt 18, Sayı 5, Sayfa 547-551, 2006.
  9. Eimsa-Ard, S., Promvonge, P., “Numerical Study On Heat Transfer Of Turbulent Channel Flow Over Periodic Grooves”, International Communications In Heat And Mass Transfer, Cilt 35, Sayfa 844-852, 2008.
  10. Zhang, L., Chen, Z., “Convective Heat Transfer In Cross-Corrugated Triangular Ducts Under Uniform Heat Flux Boundary Conditions”, International Journal Of Heat And Mass Transfer, Cilt 54, Sayı 597-605, 2011.
  11. Liu, X. P., Niu, J. l., “Effects Of Geometrical Parameters On The Thermohydraulic Characteristics Of Periodic Cross-Corrugated Channels”, International Journal Of Heat And Mass Transfer, Cilt 84, Sayı 542-549, 2015.
  12. Mirzaei, M., Sohankar, A., Davidson, L., Innings, F., “Large Eddy Simulation Of The Flow And Heat Transfer In A Half-Corrugated Channel With Various Wave Amplitudes”, International Journal Of Heat And Mass Transfer, Cilt 76, Sayfa 432-446, 2014.
  13. Artemov, V. İ., Minko, K. B., Yan’kov, G. G., “Numerical Simulation Of Fl