Natural Convection of Nanofluids in Partially Filled Metal Foam Sinusoidal Cavities

• Published in: Transport in porous media 2023-06, Vol.148 (2), p.267-289
• Main Authors: Tian, Zhen, Yue, Linfei, Qi, Cong, Tang, Maoqing
• Format: Article
• Language: English
• Subjects: Civil Engineering; Classical and Continuum Physics; Deionization; Density; Earth and Environmental Science; Earth Sciences; Electronic components; Fluid flow; Foamed metals; Free convection; Geotechnical Engineering & Applied Earth Sciences; Heat transfer; Holes; Hydrogeology; Hydrology/Water Resources; Industrial Chemistry/Chemical Engineering; Iron oxides; Metal foams; Nanofluids; Nanoparticles; Nusselt number; Sine waves; Thermal management
• ISSN: 0169-3913; 1573-1634
• DOI: 10.1007/s11242-023-01940-6

Cavities are often applied in the thermal management of electronic products, to improve the performance of cavities, a new sinusoidal cavity was developed instead of square cavity, some metal foams were partially filled in inner surface of hot and cold wall instead of smooth surface, Fe 3 O 4 –H 2 O nanofluids were chosen as the heat-transfer medium instead of water. Natural convection of Fe 3 O 4 –H 2 O nanofluids in partially filled metal foam sinusoidal cavities is investigated. Some main variables, including various nanoparticle mass fractions (wt% = 0.0%, 0.1%, 0.3%, 0.5%), heating power ( Q  = 10 W, 15 W, 20 W, 25 W), and pore density (PPI = 20, 30, 40), were considered. Compared with deionized water, with the increase of nanofluid concentration from wt% = 0.1% to wt% = 0.5%, the Nusselt number firstly increases significantly and then decreases gradually. Results showed that when Q  = 25 W, PPI = 40, wt% = 0.5%, the Nusselt number is relatively large and the heat transfer effect is the better, which gives certain advices for the structure design and selection of working condition of electronic components. Article Highlights A new partially filled metal foam sinusoidal cavity is developed. Effects of pore density and nanoparticle concentration are studied. A working condition of PPI = 40, Q  = 25 W and wt% = 0.5% is the best one for cooling of electronic components. With the increase of nanoparticle concentration, Nusselt number firstly rises and then reduces.