Advances in nano research

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Thin CNTs nanoliquid film development over a rough rotating disk

  • Swatilekha Nag (Department of Mathematics, Pandit Deendayal Upadhyaya Adarsha Mahavidyalaya) ;
  • Susanta Maity (Department of Basic and Applied Science, National Institute of Technology Arunachal Pradesh) ;
  • Sanjeev K. Metya (Department of Electronics and Communication Engineering, National Institute of Technology Arunachal Pradesh)
  • Received : 2020.01.14
  • Accepted : 2023.05.30
  • Published : 2023.08.25
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Abstract

Development of thin carbon nanotubes (CNTs) nanoliquid film over the rough surface of a horizontal rotating disk is investigated by considering symmetric roughness either along the azimuthal or radial directions. The disk surface is either heated or cooled axisymmetrically from below. The effects of single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs) are analyzed on the film thinning process with different types of base liquids. Closed form solutions for velocity and temperature field are obtained for small values of Reynolds number whereas the numerical solution is derived for moderate values of Reynolds number. It is found that fluid retention / depletion takes place when the roughness is symmetric along the azimuthal / radial directions. It is also seen that the film thinning rate enhances for MWCNTs compare to SWCNTs. Further it is found that two different heat transfer regions exits within the flow domain depending on the fact that heat is transferred from disk to liquid film and vice-versa.

Keywords

Acknowledgement

Authors express their sincere gratitude to the Council of Scientific and Industrial Research (CSIR), New Delhi, India for the financial support with file number 25(0267)/17/EMR-II.

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