HBRP Publication
Published April 18, 2020 | Version v1
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Numerical Study of Heat Transfer Characteristics of Nanofluid Flow in the Finned Pipe Subjected to Variable Heat Flux

Authors/Creators

  • 1. Department of Mechanical Engineering, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran

Description

Attempts for investigation of flows forced convective heat transfer using nanofluids have been made by numerous researchers in the recent years‎. ‎Utilizing nanofluid as a working fluid in lots of the literatures is greatly recommended To achieve higher efficiency in cooling systems. ‎ The present study surveys laminar flow forced convective heat transfer of Al‎2‎O‎3-‎water nanofluid, numerically under variable heat flux‎. Classical models which have been widely utilized for evaluating thermophysical characteristics of a nanofluid are used in the study and the effects of nanofluid heat transfer characteristics are assessed‎. ‎Two types of the pipe consist of finless tube and finned pipe are investigated‎. ‎Effects of the parameters such as variable heat flux parameter‎, ‎nanoparticle concentration‎, ‎and the Reynolds number are also assessed‎. ‎The numerical results demonstrate that the convective heat transfer coefficient of nanofluid in the both type pipes increases in accordance with volume concentration as well as Reynolds number of nano‎-particles. Furthermore‎, ‎the average convective heat transfer coefficient in the finless pipe is the same as the constant heat flux case; but‎, ‎thermal efficiency of the finned pipe under variable heat flux has higher value in comparison with the constant heat flux case‎.

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References

  • Suranjan Sarkar and R. Panneer Selvam. Molecular dynamics simulation of effective thermal conductivity and study of enhanced thermal transport mechanism in nanofluids. Journal of Applied Physics, 102(7), 074302, 2007
  • N. Sankar and Nithin Mathew and C.B. Sobhan. Molecular dynamics modeling of thermal conductivity enhancement in metal nanoparticle suspensions. International Communications in Heat and Mass Transfer, 35(7), 867 – 872p, 2008
  • Ling Li and Yuwen Zhang and Hongbin Ma and Mo Yang. An investigation of molecular layering at the liquid-solid interface in nanofluids by molecular dynamics simulation. Physics Letters A, 372(25), 4541-4544p, 2008
  • Rudyak, V. Ya. and Belkin, A. A. and Tomilina, E. A. On the thermal conductivity of nanofluids. Technical Physics Letters. 36(7), 660-662p, 2010
  • Ghosh, Madan Mohan and Roy, Someshwar and Pabi, Shyamal Kumar and Ghosh, Sudipto. A Molecular Dynamics-Stochastic Model for Thermal Conductivity of Nanofluids and Its Experimental Validation. Journal of Nanoscience and Nanotechnology. 11(3), 2196-2207p, 2011
  • Kang, Hongbo and Zhang, Yuwen and Yang, Mo. Molecular dynamics simulation of thermal conductivity of Cu–Ar nanofluid using EAM potential for Cu–Cu interactions. Applied Physics A, 103(4), 1001, 2011
  • Xiao, BO-QI and Jiang, GUO-PING and Yang, YI and Zheng, DONG-MEI. Prediction of convective heat transfer of nanofluids based on fractal Monte Carlo simulations. International Journal of Modern Physics C, 24(1), 1250090, 2013
  • Sadegh Khalili and Saeed Dinarvand and Reza Hosseini and Hossein Tamim and Ioan Pop. Unsteady MHD flow and heat transfer near stagnation point over a stretching/shrinking sheet in porous medium filled with a nanofluid, Chinese Physics B, 23(4), 48203, 2014
  • A. Ahmad and S. Asghar and A. Alsaedi. Flow and heat transfer of a nanofluid over a hyperbolically stretching sheet. Chinese Physics B, 23(7), 74401, 2014
  • Jongwook Choi and Yuwen Zhang. Numerical simulation of laminar forced convection heat transfer of Al2O3water nanofluid in a pipe with return bend. International Journal of Thermal Sciences, 55, 90-102p, 2012

Subjects

Mechanical Engineering
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