Heat Analysis Of Double-layer Heat Sources Based On The Serpentine Channel Water-cooling Heat Sink

The double-layer heat sources model exists in 3-D ICs and Double Layer Planar Motor. Because of the impact of too high temperature produced by the excessive integration density on those components, the components will become invalid. Therefore, it is much important to analyze the question of cooling of double-layer heat sources. Air cooling, in addition, as the traditional cooling method which cannot satisfy the cooling requirement of double-layer heat sources any longer, has been replaced by water cooling which has a higher coefficient of convection heat transfer.Firstly, the thesis builds a double-layer heat sources model which three heat sinks and two heat sources overlie alternately to study the heat distribution of heat sources. Meanwhile, the idea of relative proportion of convection heat transfer will be proposed. Secondly, the paper sets up a 3-D equivalent thermal resistance model and starts the analysis based on the theory of heat distribution of heat sources. Accordingly, the chart of equivalent thermal resistance of the double-layer heat sources will be got. At last, the paper will model the thermal resistance of serpentine channel heat sink. Through the analysis of cooling of heat sink, separating the heat sink into several units and building its equivalent thermal resistance model, the total thermal resistance will be got and obtain the theory result of temperature field of double-layer heat sources model.Next, the paper, by means of the Fluent software of computational fluid dynamics, will make the numerical simulating calculation of double-layer heat sources with serpentine channel heat sink. At the same time, it will solve the distribution of temperature and pressure in heat sink of the double-layer heat sources with different conditions. In the different inlet flow velocity of heat sink, the compare, with the calculation results of theory model and numerical simulation model about heat sources’ own average temperature and heat sources’ every surface’s average temperature, will tell that the theory model and numerical simulation calculation have a much good fit. By means of the numerical simulating calculation, in the same inlet flow velocity, the double-layer heat sources model in the serpentine channel heat sink proposed in the paper has the lowest average temperature compared with existed two models. So this model’s cooling effect is the best.At last, for realizing the better cooling of heat sources, the serpentine channel heat sink in double-layer heat sources model is needed to be optimized. The paper is supposed to set the average temperature of the heat sources as target function to go off multi-objective optimization. As the result, the optimum solution set can be got and is compared with simulation results. The goodness of fit is excellent between them.