Skip to main content
SpringerLink
Log in

Numerical study of a dimpled tube with conical turbulator using the first and second laws of thermodynamics

  • Published:
Journal of Thermal Analysis and Calorimetry Aims and scope Submit manuscript

Abstract

The novelty of this numerical study is integrating strategy of dimpling the tube and using turbulators in the center of a tube under constant heat flux to improve heat transfer rate. This research focused on evaluating the effect of the geometric parameters in a dimpled tube equipped with a conical turbulator based on the first and second laws of thermodynamics. In CFD modeling, the uniform inlet velocity at the inlet of the dimpled tube, non-slip condition in the walls, and atmospheric pressure at the outlet of the dimpled tube, a uniform heat flux on the tube wall and an inlet temperature of 300 K are selected as boundary conditions. The effect of pitch (S) and number of dimples (N), Reynolds number (Re = in the range of 5000 to 20,000) and heat flux (3000, 5000, 10,000 W m−2) on entropy generation, Nusselt number and the pressure drop in a dimpled tube equipped with the turbulator was investigated. The results showed that increase in S reduces the Nusselt number, pressure drop and friction factor, but thermal entropy and friction entropy decrease and so the total entropy decreases. As the number of dimples increases, the Nusselt number increases, which has similar effect on the pressure drop and friction factor. Increase in the number of dimples leads to increase in the frictional and the overall entropy, but decrease in the thermal entropy. The results showed that in low Reynolds number, the share of thermal entropy generation is much higher than the friction entropy generation and as the Reynolds number increases the share of friction entropy generation in the total entropy generation increases. The maximum Nusselt number and friction factor are related to Re = 20,000, S = 14 mm and N = 4. Based on the obtained data from modeling, heat flux has not significant influence on heat transfer and pressure drop. The maximum thermal entropy and total entropy are at Re = 5000, S = 14 mm and N = 2, while the highest friction entropy is related to Re = 5000, S = 14 mm, N = 4 and heat flux = 10,000 W m–2. Finally, the results of this research confirm that the dimples on the tube body and inserting the turbulator in the center of the dimpled tube with the efficient pitch and the number of dimples can be a logical technique to intensify the heat transfer process.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Fig. 18
Fig. 19
Fig. 20

Similar content being viewed by others

References

  1. Sheikholeslami M, Gorji-Bandpy M, Ganji DD. Review of heat transfer enhancement methods: focus on passive methods using swirl flow devices. Renew Sustain Energy Rev 2015;49:444–469.

  2. Khanmohammadi S, Mazaheri N. Second law analysis and multi-criteria optimization of turbulent heat transfer in a tube with inserted single and double twisted tape. Intern J Therm Sci. 2019;145:105998. https://doi.org/10.1016/j.ijthermalsci.2019.105998

    Article  Google Scholar 

  3. Kia S, Khanmohammadi S, Jahangiri A. Experimental and numerical investigation on heat transfer and pressure drop of SiO2 and Al2O3 oil-based nanofluid characteristics through the different helical tubes under constant heat fluxes. Intern J Therm Sci. 2023;185:108082. https://doi.org/10.1016/j.ijthermalsci.2022.108082

    Article  CAS  Google Scholar 

  4. Khanmohammadi S, Mazaheri N, Bahiraei M. Multi-criterion optimization of a biologically-produced nanofluid flow inside tubes fitted with coaxial twisted tape based on first and second law viewpoints. Powder Technology. 2022;412:117930. https://doi.org/10.1016/j.powtec.2022.117930

    Article  CAS  Google Scholar 

  5. Khan MZU, et al. Investigation of heat transfer in dimple-protrusion micro-channel heat sinks using copper oxide nano-additives. Case Stud Therm Eng. 2021;28: 101374.

    Article  Google Scholar 

  6. Manoram RB, Moorthy RS, Ragunathan R. Investigation on influence of dimpled surfaces on heat transfer enhancement and friction factor in solar water heater. J Therm Anal Calorim. 2021;145(2):541–58.

    Article  CAS  Google Scholar 

  7. Rashidi S, Hormozi F, Sundén B, Mahian O. Energy saving in thermal energy systems using dimpled surface technology—a review on mechanisms and applications. Appl Energy. 2019;250:1491–547.

    Article  Google Scholar 

  8. Thianpong C, Eiamsa-ard P, Wongcharee K, Eiamsa-ard S. Compound heat transfer enhancement of a dimpled tube with a twisted tape swirl generator. Int Commun Heat Mass Transf. 2009;36(7):698–704.

    Article  CAS  Google Scholar 

  9. Wang Y, He Y-L, Li R, Lei Y-G. Heat transfer and friction characteristics for turbulent flow of dimpled tubes. Chem Eng Technol. 2009;32(6):956–63.

    Article  CAS  Google Scholar 

  10. Kumar P, Kumar A, Chamoli S, Kumar M. Experimental investigation of heat transfer enhancement and fluid flow characteristics in a protruded surface heat exchanger tube. Exp Therm Fluid Sci. 2016;71:42–51.

    Article  Google Scholar 

  11. Li M, Khan TS, Al-Hajri E, Ayub ZH. Single phase heat transfer and pressure drop analysis of a dimpled enhanced tube. Appl Therm Eng. 2016;101:38–46.

    Article  Google Scholar 

  12. Kukulka DJ, Smith R, Li W. Comparison of condensation and evaporation heat transfer on the outside of smooth and enhanced 1EHT tubes. Appl Therm Eng. 2016;105:913–22.

    Article  CAS  Google Scholar 

  13. Shafaee M, Mashouf H, Sarmadian A, Mohseni SG. Evaporation heat transfer and pressure drop characteristics of R-600a in horizontal smooth and helically dimpled tubes. Appl Therm Eng. 2016;107:28–36.

    Article  CAS  Google Scholar 

  14. Aroonrat K, Wongwises S. Condensation heat transfer and pressure drop characteristics of R-134a flowing through dimpled tubes with different helical and dimpled pitches. Int J Heat Mass Transf. 2018;121:620–31.

    Article  CAS  Google Scholar 

  15. Aroonrat K, Wongwises S. Experimental investigation of condensation heat transfer and pressure drop of R-134a flowing inside dimpled tubes with different dimpled depths. Int J Heat Mass Transf. 2019;128:783–93.

    Article  CAS  Google Scholar 

  16. Chen J, Li W. Local flow boiling heat transfer characteristics in three-dimensional enhanced tubes. Int J Heat Mass Transf. 2018;121:1021–32.

    Article  CAS  Google Scholar 

  17. Chang SW, Chiang KF, Chou TC. Heat transfer and pressure drop in hexagonal ducts with surface dimples. Exp Therm Fluid Sci. 2010;34(8):1172–81.

    Article  Google Scholar 

  18. Xie S, Liang Z, Zhang L, Wang Y, Ding H, Zhang J. Numerical investigation on heat transfer performance and flow characteristics in enhanced tube with dimples and protrusions. Int J Heat Mass Transf. 2018;122:602–13.

    Article  Google Scholar 

  19. Pimsarn M, Samruaisin P, Eiamsa-ard P, Koolnapadol N, Promthaisong P, Eiamsa-ard S. Enhanced forced convection heat transfer of a heat exchanger tube utilizing serrated-ring turbulators. Case Stud Therm Eng. 2021;28: 101570.

    Article  Google Scholar 

  20. Fang Y, Mansir IB, Shawabkeh A, Mohamed A, Emami F. Heat transfer, pressure drop, and economic analysis of a tube with a constant temperature equipped with semi-circular and teardrop-shaped turbulators. Case Stud Therm Eng. 2022;33: 101955.

    Article  Google Scholar 

  21. Panahi D, Zamzamian K. Heat transfer enhancement of shell-and-coiled tube heat exchanger utilizing helical wire turbulator. Appl Therm Eng. 2017;115:607–15.

    Article  Google Scholar 

  22. Eiamsa-ard S, Promvonge P. Enhancement of heat transfer in a tube with regularly-spaced helical tape swirl generators. Sol Energy. 2005;78(4):483–94.

    Article  CAS  Google Scholar 

  23. Jasiński PB. Numerical study of the thermo-hydraulic characteristics in a circular tube with ball turbulators. Part 1: PIV experiments and a pressure drop. Int J Heat Mass Transf. 2014;74:48–59.

    Article  Google Scholar 

  24. Jasiński PB. Numerical study of the thermo-hydraulic characteristics in a circular tube with ball turbulators. Part 2: Heat transfer. Int J Heat Mass Transf. 2014;74:473–83.

    Article  Google Scholar 

  25. Bashtani I, Esfahani JA, Kim KC. Hybrid CFD-ANN approach for evaluation of bio-inspired dolphins dorsal fin turbulators of heat exchanger in turbulent flow. Appl Therm Eng. 2023;219: 119422.

    Article  Google Scholar 

  26. Mustafa J, Alqaed S, Sharifpur M. Economic and thermo-hydraulic features of multiphase nanofluids in a heat exchanger equipped with novel turbulators: a numerical study. Eng Anal Bound Elem. 2022;144:55–66.

    Article  Google Scholar 

  27. Pourahmad S, Pesteei SM, Ravaeei H, Khorasani S. Experimental study of heat transfer and pressure drop analysis of the air/water two-phase flow in a double tube heat exchanger equipped with dual twisted tape turbulator: simultaneous usage of active and passive methods. J Energy Storage. 2021;44: 103408.

    Article  Google Scholar 

  28. Salhi J-E, Zarrouk T, Merrouni AA, Salhi M, Salhi N. Numerical investigations of the impact of a novel turbulator configuration on the performances enhancement of heat exchangers. J Energy Storage. 2022;46: 103813.

    Article  Google Scholar 

  29. Mohammed AM, Kapan S, Sen M, Celi̇k N. Effect of vibration on heat transfer and pressure drop in a heat exchanger with turbulator. Case Stud Therm Eng. 2021;28:101680.

  30. Turgut E, Yardımcı U. Comprehensive analysis of the performance of the coaxial heat exchanger with turbulators. Int J Therm Sci. 2022;176: 107502.

    Article  Google Scholar 

  31. Nakhchi ME, Hatami M, Rahmati M. Effects of CuO nano powder on performance improvement and entropy production of double-pipe heat exchanger with innovative perforated turbulators. Adv Powder Technol. 2021;32(8):3063–74.

    Article  CAS  Google Scholar 

  32. Ribeiro F, de Conde KE, Garcia EC, Nascimento IP. Heat transfer performance enhancement in compact heat exchangers by the use of turbulators in the inner side. Appl Therm Eng. 2020;173: 115188.

    Article  Google Scholar 

  33. Liou T-M, Chen C-C, Wang C-S, Wang E-S. Thermal-fluidic correlations for turbulent flow in a serpentine heat exchanger with novel wing-shaped turbulators. Int J Heat Mass Transf. 2020;160: 120220.

    Article  Google Scholar 

  34. Chen J, Müller-Steinhagen H, Duffy GG. Heat transfer enhancement in dimpled tubes. Appl Therm Eng. 2001;21(5):535–47.

    Article  CAS  Google Scholar 

  35. Bhattacharyya S, et al. Thermal performance enhancement in heat exchangers using active and passive techniques: a detailed review. J Therm Anal Calorim. 2022;147(17):9229–81.

    Article  CAS  Google Scholar 

  36. Pesteei S, Mashoofi N, Pourahmad S, Roshana A. Numerical investigation on the effect of a modified corrugated double tube heat exchanger on heat transfer enhancement and exergy losses. Int J Heat Technol. 2017;35(2):243–8.

    Article  Google Scholar 

  37. Mashoofi N, Pourahmad S, Pesteei SM. Study the effect of axially perforated twisted tapes on the thermal performance enhancement factor of a double tube heat exchanger. Case Stud Therm Eng. 2017;10:161–8.

    Article  Google Scholar 

  38. Said Z, Rahman S, Sharma P, Amine Hachicha A, Issa S. Performance characterization of a solar-powered shell and tube heat exchanger utilizing MWCNTs/water-based nanofluids: an experimental, numerical, and artificial intelligence approach. Appl Therm Eng. 2022;212:118633.

  39. Karami E, Rahimi M, Azimi N. Convective heat transfer enhancement in a pitted microchannel by stimulation of magnetic nanoparticles. Chem Eng Process Process Intensif. 2018;126.

  40. Xie C, et al. Performance boost of a helical heat absorber by utilization of twisted tape turbulator, an experimental investigation. Case Stud Therm Eng. 2022;36: 102240.

    Article  Google Scholar 

  41. Xu P, Zhou T, Xing J, Chen J, Fu Z. Numerical investigation of heat-transfer enhancement in helically coiled spiral grooved tube heat exchanger. Prog Nucl Energy. 2022;145: 104132.

    Article  CAS  Google Scholar 

  42. Goh LHK, Hung YM, Chen GM, Tso CP. Entropy generation analysis of turbulent convection in a heat exchanger with self-rotating turbulator inserts. Int J Therm Sci. 2021;160: 106652.

    Article  Google Scholar 

  43. Sheikholeslami M, Jafaryar M, Shafee A, Li Z. Nanofluid heat transfer and entropy generation through a heat exchanger considering a new turbulator and CuO nanoparticles. J Therm Anal Calorim. 2018;134(3):2295–303.

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Kermanshah University of Technology, Kermanshah, Iran

    Shoaib Khanmohammadi & Faezeh Nazari

  2. Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, Tehran, Iran

    Ali Jahangiri

  3. Chemical Engineering Department, CFD Research Center, Razi University, Kermanshah, Iran

    Neda Azimi

  4. Department of Chemical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

    Neda Azimi

Authors
  1. Shoaib Khanmohammadi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Ali Jahangiri
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Faezeh Nazari
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Neda Azimi
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Shoaib Khanmohammadi.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Khanmohammadi, S., Jahangiri, A., Nazari, F. et al. Numerical study of a dimpled tube with conical turbulator using the first and second laws of thermodynamics. J Therm Anal Calorim 148, 8497–8510 (2023). https://doi.org/10.1007/s10973-022-11886-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10973-022-11886-4

Keywords

Search

Navigation