Radiation and heat generation effects in magnetohydrodynamic mixed convection flow of nanofluids
| Autor: | Sharidan Shafie, Ilyas Khan, Aaiza Gul |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment lcsh:Mechanical engineering and machinery Thermodynamics Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology MHD mixed convection Physics::Fluid Dynamics radiation analytical solutions Viscosity 020303 mechanical engineering & transports Thermal conductivity Nanofluid 0203 mechanical engineering Combined forced and natural convection Heat generation spherical Ag nanofluids heat generation lcsh:TJ1-1570 Magnetohydrodynamic drive Magnetohydrodynamics 0210 nano-technology |
| Zdroj: | Thermal Science, Vol 22, Iss 1 Part A, Pp 51-62 (2018) |
| ISSN: | 2334-7163 0354-9836 |
| Popis: | Radiation and heat generation effects in unsteady magnetohydrodynamic (MHD) mixed convection flow of nanofluids along a vertical channel are investigated. Silver ()Ag nanoparticles of spherical shapes and of different sizes in water as a convectional base fluid are incorporated. The purpose of this study is to measure the effect of different sizes of nanoparticles on velocity and temperature. Keeping in mind the size, particle material, shape, clustering and Brownian motion of nanoparticles, Koo and Kleinstreuer model is used. The problem is modelled in terms of partial differential equations with physical boundary conditions. Analytical solutions are obtained for velocity and temperature, plotted and discussed. It is concluded that increasing the size of Ag nanoparticles (up to specific size (30 nm ) results in a very small velocity increment while for large particle size (30 nm -100nm ), no change in velocity is observed. As the small size of nanoparticles has the highest thermal conductivity and viscosity. This change in velocity with size of nanoparticles is found only in water-based nano fluids with low volume fraction 0.01 while at low volume concentration, no change is observed. |
| Databáze: | OpenAIRE |
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