Introducing a ψ-shaped cavity for cooling a heat generating medium

Reducing the excess temperature in the heat generating pieces such as electronic devices is becoming a formidable challenge. The competition for introducing more efficient tools to cool down the hot pieces still continues. In this paper, a new configuration of an inverted fin ('cavity'), penetrated into a heat generating medium, is proposed, evolved and optimized. On account of its particular shape, the new configuration is called the 'ψ-shaped' cavity. A big picture of how this flow configuration evolves to become better, is provided. To accomplish this, a numerical optimization based on a finite element code and exhaustive search algorithm is performed to seek for the best geometric structure of the ψ-shaped cavity. The optimization objective is to minimize the excess (hot spot) temperature of the heat generating piece subjected to a fixed volume of the cavity constraint. It is convincingly indicated that the ψ-shaped cavity with optimum geometrical structure performs dramatically superior among the single-cavity structures investigated in the literature. For example, the lowest hot spot temperature obtained in the ψ-shaped cavity is found about 25% lower than that obtained in the best cavity investigated in the literature when the cavity occupies 10% of the heat generating body.