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Advances in Nano Research Volume 15, Number 2, August 2023 , pages 91-104 DOI: https://doi.org/10.12989/anr.2023.15.2.091 |
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Thin CNTs nanoliquid film development over a rough rotating disk |
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Swatilekha Nag, Susanta Maity and Sanjeev K. Metya
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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. | ||
| Key Words | ||
| carbon nanotubes (CNTs); nanoliquid; rotating disk; thermocapillary flow; thin film | ||
| Address | ||
| Swatilekha Nag: Department of Mathematics, Pandit Deendayal Upadhyaya Adarsha Mahavidyalaya, Behali, Assam-784184, India Susanta Maity: Department of Basic and Applied Science, National Institute of Technology Arunachal Pradesh, Jote, Papum Pare-791113, India Sanjeev K. Metya: Department of Electronics and Communication Engineering, National Institute of Technology Arunachal Pradesh, Jote, Papum Pare-791113, India | ||