Mohsen H. Al-Rashed

CPU Heat Sink Cooled by Nanofluids and Water: Experimental and Numerical Study

Abstract In this study, a commercial heat sink was employed for cooling a PC processor. Two liquids were used (i) water and (ii) copper oxide (II) nanofluids with 0.0086 and 0.0225 volume fractions. In the experiments, the heat sink was fixed to the CPU. The maximal power dissipated by the investigated processor was 115 W. The mass flow rate of the liquids was in the range of 0.009 to 0.05 kg/s and the inlet temperature was in the range of 300 to 305 K. The experimental results were used to validate the numerical model of the analyzed system. The commercial package ANSYS Fluent 13 was employed to generate a CFD heat transfer simulation. A laminar flow regime was proposed in a fin array area of the heat sink. An appropriate grid quality model was developed and validated. The obtained results showed that water was sufficient enough for CPU cooling.

Multiphase CFD modeling - scale-up of Fluidized-Bed Crystallizer

Abstract The main goal of this study was to obtain a closer look to scale up problem of the Fluidized-Bed crystallizer operation, in particular for solids concentration larger than 10 vol.%. To achieve that a multi-phase CFD code was used. Such an approach to this problem has not been investigated until now. Data collected using CFD technique, impossible to obtain in any other way, especially for an industrial apparatus, provides the information about the suspension flow behaviour in such crystallizers.