Numerical study of natural convection heat transfer in a heat exchanger filled with nanofluids
作者： Faroogh Garoosi , Faraz Hoseininejad , Mohammad Mehdi Rashidi
DOI: 10.1016/J.ENERGY.2016.05.051
关键词:
摘要: Abstract Natural convection of nanofluids around several pairs hot and cold cylinders in an adiabatic enclosure is investigated numerically. Hot are maintained at the different constant temperatures (Th > Tc) while walls thermally insulated. A parametric study undertaken to explore effects pertinent parameters, such as; Rayleigh number, size type nanoparticles, shape enclosure, orientation number on fluid flow heat transfer characteristic. The simulations show that low Ra, by changing from square triangular one, rate decreases. It also found each there optimum volume fraction nanoparticles (ϕopt) where within has a maximum value. Moreover, results this showed altering horizontal vertical mode, enhances. Finally, indicated that, decreasing optimal particle loading
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