TURBULENT HEAT TRANSFER FOR INTERNAL FLOW OF ETHYLENE GLYCOL-AL2O3 NANOFLUID IN A SPIRAL GROOVED TUBE WITH TWISTED TAPE INSERTS

Year 2021, , 761 - 772, 01.05.2021

Ahmed Fakhrey Khudheyer Audai Hussein Al-abbas Mihail-bogdan Carutasiu Horia Necula

https://doi.org/10.18186/thermal.928556

Cited By: 4

Abstract

Numerical investigation for turbulent flow of nanofluid (Ethylene glycol/water-Al2O3) is carried out with a volume fraction of 0.5%, 1%, and 1.5%. The diameter of solid nanoparticles is equal to 20 nm. The range of Reynolds number in this simulation is from 6300 to 27500 through a three-dimensional steel corrugated spirally tube. For enhancement of the heat transfer performance in internal flow through the horizontal tube, the tube is combined with aluminum twist tape of a thickness of 0.8 mm and a width of 10 mm along the spirally corrugated tube. In the present work, the same twisted ratios TR=(y/w) are implemented for corrugated tube and tape. The predicted results showed that there is a clear increase in the values of heat transfer and the pressure drop in the direction of flow. Furthermore, the friction factor is increased because of the grooved and twisted tape which rise the resistance of the fluid flow. The values of Nusselt number are increased with the VOF of nanofluid. These numerical results are compared with the experiment found in the literature and showed a good agreement.

Keywords

Ethylene glycol, Water-Al2O3, Numerical analysis, Corrugated spirally tube, Heat transfer, Internal flow

References

• [1] Mohammadiun H, Mohammadiun M, Hazbehian M, Maddah H. Experimental study of ethylene glycol-based Al 2 O 3 nanofluid turbulent heat transfer enhancement in the corrugated tube with twisted tapes. Heat Mass Transf 2016;52:141–51.
• [2] Qi C, Wan Y-L, Li C-Y, Han D-T, Rao Z-H. Experimental and numerical research on the flow and heat transfer characteristics of TiO2-water nanofluids in a corrugated tube. Int J Heat Mass Transf 2017;115:1072–84.
• [3] Hashim WM, Hoshi HA, Al-Salihi HA. Enhancement the performance of swirl heat exchanger by using vortices and NanoAluminume. Heliyon 2019;5:e02268.
• [4] Jayakumar JS, Mahajani SM, Mandal JC, Iyer KN, Vijayan PK. CFD analysis of single-phase flows inside helically coiled tubes. Comput Chem Eng 2010;34:430–46.
• [5] Thianpong C, Eiamsa-Ard P, Promvonge P, Eiamsa-Ard S. Effect of perforated twisted-tapes with parallel wings on heat tansfer enhancement in a heat exchanger tube. Energy Procedia 2012;14:1117–23.
• [6] Nadila NI, Lazim TM, Mat S. Verification of heat transfer enhancement in tube with spiral corrugation. AIP Conf. Proc., vol. 2062, AIP Publishing LLC; 2019, p. 20032.
• [7] Abu-Mulaweh HI. Experimental comparison of heat transfer enhancement methods in heat exchangers. Int J Mech Eng Educ 2003;31:160–7.
• [8] Shrirao PN, Sambhe RU, Bodade PR. Experimental Investigation on Turbulent Flow Heat Transfer Enhancement in a Horizontal Circular Pipe using internal threads of varying depth. IOSR J Mech Civ Eng 2013;5:23–8.
• [9] Song D, Hatami M, Wang Y, Jing D, Yang Y. Prediction of hydrodynamic and optical properties of TiO2/water suspension considering particle size distribution. Int J Heat Mass Transf 2016;92:864–76.
• [10] Piriyarungrod N, Eiamsa-Ard S, Thianpong C, Pimsarn M, Nanan K. Heat transfer enhancement by tapered twisted tape inserts. Chem Eng Process Process Intensif 2015;96:62–71.
• [11] Promthaisong P, Jedsadaratanachai W, Eiamsa-Ard S. Effect of geometrical parameters on turbulent flow and heat transfer behaviors in triple-start corrugated tubes. J Therm Sci Technol 2018;13:JTST0008–JTST0008.
• [12] Li Y, Wu J, Wang H, Kou L, Tian X. Fluid flow and heat transfer characteristics in helical tubes cooperating with spiral corrugation. Energy Procedia 2012;17:791–800.