Numerical study of a hybrid jet impingement/micro-channel cooling scheme

Stepwise varying width microchannel cooling device for uniform wall temperature: Experimental and numerical study

“…These results were found after validating the CFD model with the experimental data extracted from the heat sink device proposed in a previous study [19]. Generally, such a correlation is required to guide the design, and could be obtained by experimental measurements or parametric CFD studies for different channels widths.…”

“…The main objective of this procedure is to improve the temperature uniformity of the cooled object, while maintaining thermal resistance levels achieved in the previous works [18,19].…”

“…Furthermore, this design maintains the global high heat removal capability inherent to microchannel technologies. Numerical parametric studies [19,20] also showed that the temperature distribution provided by the variable width microchannel heat sink can be tailored, through the non-uniform distribution of its local heat removal capability, according to the cooling needs of the system. Some subsequent studies such as that conducted by Karathanassis et al [21] and Dede and Liu [22] confirmed that the introduction of stepwise varying channels increases the thermal performance of this heat-sink configuration without introducing a severe pressure drop penalty.…”

Constructal Vascular Structures With High-Conductivity Inserts for Self-Cooling

“…Therefore, increasing the convective heat transfer coefficient after a ceiling value does not change the order of the overall heat transfer rate. The current literature shows that embedding microchannels in the solid domain increases the overall thermal conductance by decreasing the conductive resistances [18,19]. These references also show that the pumping power increases with added microchannels and the rate of increase can be decreased by morphing the design.…”

“…This theory shows how the shape should be morphed freely in order to minimize resistances in a flow system (flow of heat, fluid and/or stress) [16,17,21,22]. Constructal theory is used in distinct fields, such as engineering, biology, geology, and physics [17,18,[21][22][23][24][25][26][27][28][29][30]. In addition, this theory shows the connection between these fields by uncovering how the designs evolve in time in order to minimize resistances, and how the designs in different fields look alike because their designs are governed by the same objective, i.e., design of river-deltas, human lungs, Eiffel Tower, lightning bolts, and trees has the same objective: minimization of resistances to the flow of fluid, heat, and stress [18,31].…”