Natural convection heat transfer characteristics of sinusoidal cavities filled with nanofluids

To improve the heat transfer of free convection of cavity in the field of photothermal conversion and cooling of electronic components, new sinusoidal cavities were developed. The heat transfer properties of Fe3O4-H2O nanofluids in the novel cavities were studied experimentally. The influence of three amplitudes (A=1 mm, A=2 mm, A=3 mm) and three wave numbers (n = 1, n = 2, n = 3), four mass fractions (wt%=0.0%, wt%=0.1%, wt %=0.3%, wt%=0.5%) and four heating powers (Q=10 W, Q=15 W, Q=20 W, Q=25 W) on heat transfer behavior was researched. The results showed that when the amplitude is A= 3 mm and the wave number is n = 2, the Nusselt number is the largest, and the heat exchange cavity exhibits the best heat transfer performance, the Nusselt number increases with nanofluids mass fraction and heating power. It provides important guidance for the design of cavities in the field of photothermal conversion and cooling of electronic components.

Automated summary

In this study, the heat transfer properties of nanofluid in a novel cavity were experimentally investigated. The results showed that the best heat transfer performance was achieved when the amplitude was 3mm and the wave number was 2. This provides important guidance for the design of cavities in the field of photothermal conversion and cooling of electronic components.