Abstract
In this paper, we report our numerical and analytical investigation of AC Electro Thermal (ACET) flow for cooling of localized hotspots in multi-core processors. AC Electro Thermal Flows are caused by gradients in electrical conductivity and permittivity of an electrolytic fluid, which in turn, result from temperature gradient. In our proposed configuration, the heat generated at the CPU hot spots result in the required temperature gradients that drive the ACET flow. The flow is governed by a set on non-linear equations that are difficult and time consuming to solve numerically. In this study, a nonlinear thermal resistance matrix and capacitive impedance matrix based on transient analysis have been obtained by solving traditional energy balance equations to predict the hot spot temperatures for the system. The average axial flow and heat transfer coefficient of vertical ET convection have been found to increase with the increase in Joule number and ACET force number. The reduced order model predictions were found to match the values from detailed numerical simulations within 10%.
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