Structure Optimization And Thermodynamic Analysis Of Jet Microchannel Radiator

With the continuous improvement of the integrated circ uit manufacturing process,the heat generation is also increasing.Therefore,the integrated circuit industry requires efficient thermal management techniques to continuously improve the performance and reliability of electronic devices.Based on this,this paper combines microchannel cooling te chnology and impinging jet cooling technology,optimizes its structure,designs a series of jet microchannel models with compact structure and hi gh heat dissipation performance,and analyzes the flow and heat transfer characteristics and performance of jet microchannel from the aspects of flow characteristics,heat transfer characteristics,entropy generation characteristics in thermodynamics and heat transfer efficiency through numerical simulation.According to the second law of thermodynamics,the entropy production model and the heat energy transfer effici ency model of the flow and heat transfer process of the jet microchannel are deduced.From the perspective of thermodynamics,the essential reasons that affect the enhanced heat transfer of the jet microchannel are analyzed.Theoretical analysis shows that reducing the net value of fluid temperature gradient can enhance heat transfer.Through the analysis of entropy production principle and thermal energy transfer efficiency,it is found that the irreversible loss caused by heat transfer is much larger than that caused by flow friction,which means that the irreversible loss of heat transfer acco unts for the main part of the total entropy production.The increase of convex rib structure can increase the b ottom fluid vortex,thereby enhancing the heat transfer performance.Therefore,a series of micro channel models of convex rib jet are designed f rom three aspects of convex rib size,convex rib cutting shape and convex rib arrangement,and are compared with those of non convex rib jet micro channel.The results show that the optimal convex rib size is 0.6 mm,the optimal convex rib shape is a rectangular rib,and the optimal convex rib arrangement is that the convex rib faces the jet holes.In order to improve the disadvantage of the unbalanced effect of fixed jet on the flow field in the microchannel,a self-excited oscillator was added to build an oscillating jet microchannel model,which was compared with the fixed jet microchannel.The results show that,compared with the fixed jet,the jet swept by the oscillating jet has a larger diffusion angle and a larger impact coverage,and the oscillating jet drives the fluid domain under the oscillator and the fixed jets on both sides to change continuously,whic h affects the entire microchannel.The disturbance of the fluid domain has a greater impact.Through this feature,the oscillating jet microchann el heat sink is superior to the fixed jet microchannel in all parameters,and its thermal energy transfer efficiency is as high as 98.48%,showing a good potential.