| dc.description.abstract | The service life of modern, high-power, compact electronic components is affected by their heat dissipation capacity. It has become very important to cool the microchips, which are used in every stage of daily life and have been miniaturized with the developing technology, and the heating problem has arisen. In this study, the cooling of circular hollow and trapezoidal models with fixed 1000 W/m2 heat flux in the channels by impinging jet-cross flow using water and GO (Graphene Oxide)-Water nanofluid with 0.02% volumetric nanoparticle concentration was numerically investigated. The numerical study was carried out steady and in three dimensions by using the Ansys-Fluent program with k-E turbulence model. The thermophysical properties of the nanofluid were obtained experimentally. Considering the studies in the literature, three patterned models were placed in the channels in accordance with the channel dimensions. While the angles of the fins positioned in the channels are 30°and 60°; their distance from the impinging jet inlet is N=D. The channel heights are 4D and the Re number range ofthe fluids is 9000-13000. The accuracy and acceptability ofthe results obtained from the study has been proven by using the equation obtained as a result of experimental research. The results of the study were comparatively surveyed for water and nanofluid in the finless and finned conditions as changes in the average Nu number for each pattern in the channels. In addition, velocity and temperature contour distributions of the impinging jet-cross flow nanofluid flow were presented for different fin angles, taking into account the jet-pattern interactions. However, performance evaluation numbers (PEC) and average Nu number (Num) and surface temperature values (Tın) were evaluated for Re=13000 at different Reynolds numbers for all three models in the channels. At Re=13000, 16% and 17.57% increases in Num value were obtained for circular hollow and trapezoidal model surfaces in the impinging jet-cross flow channel with GO-Water nanofluid and 60° fin angle compared to the water flow and the finless channel, respectively. However, it was found that the PEC number values for the water fluid in both model surface channels were higher than the GO-Water nanofluid. | tr |
