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Natural convection in a cavity with undulated walls filled with water-based non-Newtonian power-law CuO–water nanofluid under the influence of the external magnetic field.
- Source :
- Numerical Heat Transfer: Part A -- Applications; 2019, Vol. 76 Issue 7, p552-575, 24p, 4 Color Photographs, 5 Charts, 9 Graphs
- Publication Year :
- 2019
-
Abstract
- Natural convection heat transfer in a square cavity (with wavy or plane wall) filled with non-Newtonian power-law nanofluid has been elucidated for several input parameters like Ra spanning from 10<superscript>5</superscript> to 10<superscript>6</superscript>, power-law index (n) from 0.6 to 1.4, and volume fraction of CuO nanoparticles (ϕ) from to 0 to 0.12. Effect of external magnetic field on heat transfer has been illustrated by varying the Ha from 0 to 90. In the present study, our main objective is to explore the effect of nanoparticles on heat transfer enhancement in non-Newtonian power-law fluid. It is found that the addition of nanoparticles (ϕ) to shear thinning fluid enhances the heat transfer approximately 15% when ϕ increases from 0 to 0.12 for Ha less than 60 at all Ra. For a shear thickening fluid, the same thing happens for all Ha at any Ra. The average surface Nusselt number for a cavity with wavy wall is less than that of a plane wall for all cases which is not true for the case of local Nusselt number. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10407782
- Volume :
- 76
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Numerical Heat Transfer: Part A -- Applications
- Publication Type :
- Academic Journal
- Accession number :
- 138478890
- Full Text :
- https://doi.org/10.1080/10407782.2019.1644898