The current paper reports the major trends in scientific research that occurred recently in the field of removing generated heat in electronic equipments using passive majorly and active minorly. The studies in literature are distributed between many sub-categories like: changing the geometry of extended surfaces, or the material that manufactured from, the working fluid that passed over them and / or the dimension of channel whether mini or micro.

Improving the thermal design of geometric Heat Sinks (HSs) reduces their size and weight and improves heat dissipation, hence enhancing the speed of electronic devices. In this numerical study, a novel thermal design of HSs is proposed by inserting various forms in order to obtain the optimum thermal design for this type of HSs. This study has two primary objectives: determining the influence of varying types of HSs while maintaining the volume of fins, and introducing new geometries such as circular fin and circular cut fin. The tests were conducted with a heat flux of 11.1 kW/m2 and a Reynolds number (Re) ranging from 2418.56 to 819.19. For forced convection, three-dimensional numerical simulations utilising the Navier-Stokes equations laminar model and energy equation are acquired using the commercially available COMSOL Multi-physics version 5.6a CFD software. The results indicate that. A comparison analysis of HSs with different geometries revealed that the circular-cut shape exhibited the highest thermal efficiency, as measured by the Nusselt number about 153 as well as the heat transfer coefficient and the minimum thermal resistance.

In this study, the effect of changing geometry of the heat sinks on forced convection heat transfer and laminar fluid flow features in a rectangular channel has been studied experimentally and numerically of the circular fins and circular-cut fins heat sinks with straight continuous fins as reference comparison. For the experimental conditions, the Reynolds number value varied as 2418.56- 806.19 according to the variation of flow rate values. The wall heat flux was varied as 11.11, 31.11, 58.05, 83.05, 112.5, 155 kW/m2. COMSOL Multiphysics was used to solve the governing equations under laminar flow conditions with air as the working fluid. To verify the accuracy of the analytical model, the simulation's optimal design was constructed and experimentally validated. The results indicated that circular-cut fins enhanced heat dissipation. Nusselt numbers for CCFs with Reynolds numbers of 797.7 and 2393.1 are roughly 83.6 and 132.4 at a heat flux of 11.1, kW/m2.    

Improving the thermal design of geometric Heat Sinks (HSs) reduces their size and weight and improves heat dissipation, hence enhancing the speed of electronic devices. In this numerical study, a novel thermal design of HSs is proposed by inserting various forms in order to obtain the optimum thermal design for this type of HSs. This study has two primary objectives: determining the influence of varying types of HSs while maintaining the volume of fins, and introducing new geometries such as circular fin and circular cut fin. The tests were conducted with a heat flux of 11.1 kW/m2 and a Reynolds number (Re) ranging from 2418.56 to 819.19. For forced convection, three-dimensional numerical simulations utilising the Navier–Stokes equations laminar model and energy equation are acquired using the commercially available COMSOL Multi-physics version 5.6a CFD software. The results indicate that. A comparison analysis of HSs with different geometries revealed that the circular-cut shape exhibited the highest thermal efficiency, as measured by the Nusselt number about 153 as well as the heat transfer coefficient and the minimum thermal resistance.