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CFD modeling and analysis of effect of nanoparticle shape on heat transfer of confined slot-jet impingement with nanofluid

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Abstract

In the past few decades, state-of-the-art technologies for heat transfer have been considerably developed to have more performable systems in industries. Among the available solution to increase the thermal performance, the use of nanofluids can be considered due to their high thermal performance. In the present work, a numerical investigation has been carried out on impingement jet with nanofluid to study its fluid dynamics and thermal performance. In this paper, the working fluid is considered a boehmite alumina nanofluid with a base fluid of water and ethylene glycol mixture (50:50). The impact of changing in Reynolds number, the volume fraction, and shape of nanoparticle such as spherical, plate, blade, cylindrical and brick shapes on heat transfer, and the dynamic of flow have been examined. The outcomes of the current study indicated that heat transfer raises as a result of increasing in the Reynolds number and volume fraction. The maximum Nusselt number and the maximum of heat transfer occurs in the cases with platelet and cylindrical nanofluids. On the other hand, the minimum heat transfer rate occurs in the cases with nanofluids with spherical nanoparticles. Also results showed that at volume fraction equals to 2% and 4%, the Nusselt numbers of nanofluid contains platelet particles are about 28.96% and 83.3%, more than the spherical particle nanofluid, respectively.

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Abbreviations

A :

Viscosity shape factor

Cp:

Specific thermal capacity \((\mathrm{kJ}/\mathrm{kg K})\)

\({C}_{\mathrm{k}}\) :

Shape factor

\(\eta\) :

Dynamic viscosity (\(\mathrm{kg}/\mathrm{m s})\)

\(\phi\) :

Volume fraction of nanofluid

\(\rho\) :

Fluid density \((\mathrm{kg}/{\mathrm{m}}^{3})\)

\(\nu\) :

Kinematic viscosity \((\mathrm{m}/{\mathrm{s}}^{2})\)

h :

Convective heat transfer coefficient (\(\mathrm{W }/{\mathrm{m}}^{2}\mathrm{ K})\)

H :

Height of impingement jet (m)

k :

Conductive heat transfer coefficient \((\mathrm{W }/{\mathrm{m}}^{2}\mathrm{K})\)

L :

Length of targeted wall (m)

M :

Molecular weight (g/mol)

P :

Pressure \((\mathrm{N}/{\mathrm{m}}^{2})\)

T :

Temperature (K)

u :

Inlet velocity of jet (m/s)

V :

Volume \(({\mathrm{m}}^{3})\)

Re :

Reynolds number

Nu :

Nusselt number

\({q}^{{^{\prime}}{^{\prime}}}\) :

Heat flux \((\mathrm{W}/{\mathrm{m}}^{2})\)

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Authors and Affiliations

  1. Institute of Fluid Mechanics and Heat Transfer, Vienna University of Technology, Vienna, Austria

    Javad Sodagar-Abardeh

  2. Depaertment of Mechanical Engineering, University of Birjand, Birjand, Iran

    Ali Edalati-nejad

  3. Department of Industrial Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

    Kimiya Torkamani

  4. Faculty of Engineering, Mechanical Engineering Department, Ferdowsi University of Mashhad, Mashhad, Iran

    Payam Nasery

Authors
  1. Javad Sodagar-Abardeh
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  2. Ali Edalati-nejad
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  3. Kimiya Torkamani
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  4. Payam Nasery
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Correspondence to Javad Sodagar-Abardeh.

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Sodagar-Abardeh, J., Edalati-nejad, A., Torkamani, K. et al. CFD modeling and analysis of effect of nanoparticle shape on heat transfer of confined slot-jet impingement with nanofluid . Microfluid Nanofluid 25, 49 (2021). https://doi.org/10.1007/s10404-021-02451-w

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