Rayleigh-Bénard cell formation of green synthesized nano-particles of silver and selenium

Rajesh Kumar, Jyoti Sharma, Jyoti Sood

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


In the present study Rayleigh-Bénard convection has been studied in metallic and non metallic nanofluids, prepared from green synthesized silver and selenium nano-particles (NPs) using Azadirachta indica plant (Neem) as an effective bio-product. It is observed that at room temperature, low concentrations of leaf extract of Neem is sufficient to biosynthesize silver NPs in lab from silver nitrate solution and selenium NPs from sodium selenite, which is indicated by the change in color of the solution. The characterization of the obtained nanoparticles further confirms the green synthesis of the nanoparticles. The formation of Bénard cells is delayed in silver and selenium nano-fluids in comparison to simple water proving that the presence of nano-particles in base fluid increases the heat capacity of fluid. These results are validated by mathematically solving the partial differential equations based on conservation laws to get the analytic expression for thermal Rayleigh number which indicates the presence of convection process.

Original languageEnglish
Pages (from-to)1781-1787
Number of pages7
JournalMaterials Today: Proceedings
StatePublished - 2020
Externally publishedYes
Event2020 International Conference on Aspects of Materials Science and Engineering, ICAMSE 2020 - Chandigarh, India
Duration: 29 May 202030 May 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd.


  • Conservation equations
  • FTIR spectroscopy
  • Green Synthesis of Nanoparticles
  • Rayleigh-Bénard Convection
  • UV-Vis Spectra


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