Effect of rotating and oscillating blade on the heat transfer enhancement of non-Newtonian fluid flow in a channel
| Autor: | Marzie Babaie Rabiee, Ehsan Izadpanah, Shahram Talebi, Hosein Sadeghi |
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| Rok vydání: | 2017 |
| Předmět: |
Pressure drop
Materials science Power-law fluid 020209 energy Heat transfer enhancement Energy Engineering and Power Technology Thermodynamics 02 engineering and technology Mechanics Heat transfer coefficient 01 natural sciences Churchill–Bernstein equation Nusselt number Industrial and Manufacturing Engineering Non-Newtonian fluid 010305 fluids & plasmas Physics::Fluid Dynamics 0103 physical sciences Heat transfer 0202 electrical engineering electronic engineering information engineering |
| Zdroj: | Applied Thermal Engineering. 113:1277-1282 |
| ISSN: | 1359-4311 |
| Popis: | In the present work, the effect of rotating and oscillating blade on heat transfer enhancement of Newtonian and non-Newtonian fluid flow in a channel is investigated numerically. The non-Newtonian fluid with shear thinning and shear thickening behavior is modeled by the power-law relationship. The results are presented for local and average Nusselt number, pressure drop and temperature and vorticity contours for various power law indexes. Depending on the power law index, the rotating or stationary blade can have more effects on heat transfer. Also, it is observed that by increasing power law index the value of heat transfer decreases. Comparing the results of channel with and without the blade, it can be found that the presence of the blade for all power law indexes has a positive effect on the heat transfer enhancement. The maximum heat transfer enhancement to straight channel is 58.7% for a stationary blade with n = 0.4. |
| Databáze: | OpenAIRE |
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