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首页> 外文会议>IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems >Maldistribution of Two-Phase Flow in Parallel Channel Heat Sinks: Effects of Thermal Connection Between Channels
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Maldistribution of Two-Phase Flow in Parallel Channel Heat Sinks: Effects of Thermal Connection Between Channels

机译：平行通道散热器中的两相流分布不均：通道之间的热连接效应

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Two-phase cold plates, in which heat is transferred to a fluid flow via the process of flow boiling, offer a high performance thermal management solution for a variety of applications. Studies have identified that flow in such cold plates can be accompanied by flow instabilities. This work studies the maldistribution of flow in parallel channel cold plates. A dynamic model is developed to solve the hydrodynamics and the heat transfer in a system of parallel channels, embedded in a common base, connected to common inlet and outlet headers. The model solves the hydrodynamics by combining the pressure drop models for single channels with a model for the driving pump. The conduction in the base and the walls is solved by using a resistance network approach. The stability of the steady-state solutions of the model is used to identify the effects of heat transfer in the cold plate base and walls on the distribution of flow in the parallel channels. It is observed that increasing thermal connection among the channels, via the base and the walls, reduces the degree of maldistribution in the parallel channel cold plate. A threshold in the value of the base and wall thermal conductivity is identified, such that any higher value would necessarily lead to a uniform flow distribution in the channels. It is also identified that this threshold increases with increasing number of channels; the threshold has a quadratic polynomial relation with the number of channels. These results provide insight into the relevance of thermal connection between the parallel channels regarding mitigating the maldistribution of flow in parallel channel cold plates.
机译：两相冷板通过流沸腾过程将热量传递到流体流中，为各种应用提供了高性能的热管理解决方案。研究已经确定，在这种冷板上的流动可能伴随着流动的不稳定性。这项工作研究了平行通道冷板中流动的不均匀分布。建立了一个动力学模型，以解决平行通道系统中的流体动力学和传热问题，该系统并联在一个公共底座中，并连接到公共进出水管。该模型通过将单通道的压降模型与驱动泵的模型相结合来解决流体动力学问题。通过使用电阻网络方法可以解决底部和墙壁中的导电问题。该模型的稳态解的稳定性用于确定冷板底部和壁中传热对平行通道中流动分布的影响。可以看出，通过底部和壁增加了通道之间的热连接，减少了平行通道冷板中分布不均的程度。确定基础导热系数和壁导热系数的阈值，以便任何更高的值必然会导致通道中的流量均匀分布。还可以确定，此阈值随通道数量的增加而增加;阈值与通道数呈二次多项式关系。这些结果提供了对平行通道之间的热连接与减轻平行通道冷板中流量分布不均的相关性的见解。

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