Numerical investigation of effect of variable viscosity on transient heat transfer over a non-isothermal axisymmetric body: nanoparticle volume fraction-dependent viscosity
| Autor: | Mridu Sharma, Shobha Bagai |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Buoyancy
Materials science Natural convection General Chemical Engineering General Engineering General Physics and Astronomy Mechanics engineering.material Nusselt number Sherwood number Thermophoresis Physics::Fluid Dynamics Viscosity Nanofluid engineering General Earth and Planetary Sciences General Materials Science Brownian motion General Environmental Science |
| Zdroj: | SN Applied Sciences. 2 |
| ISSN: | 2523-3971 2523-3963 |
| DOI: | 10.1007/s42452-020-2381-4 |
| Popis: | The current research paper delibrates the effect of variable viscosity of the nanofluid that saturates a porous media, on transient free convection. The viscosity term that appears in the equation of conservation of momentum depends on nanoparticle volume fraction. The effect of viscosity parameter on reduced Nusselt number and reduced Sherwood number for different combinations of Buoyancy ratio Nr, Brownian motion Nb and thermophoresis Nt is examined using the unconditionally stable Keller Box method. The conditions for existence of the numerical solution has been analytically derived. The study illustrates that the variation in viscosity has an insignificant effect on the reduced Nusselt number, but the reduced Sherwood number increases with an increase in the viscosity. Although the study can accommodate any arbitrary axisymmetric body, vertical flat plate, horizontal cylinder and sphere are three particular geometries that are considered in the paper. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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