Showing papers by "Avram Bar-Cohen published in 1992"

A technique for enhancing boiling heat transfer with application to cooling of electronic equipment

Abstract: Particle layering is introduced as an effective and convenient technique for enhancing boiling nucleation on a surface. Because it can be applied without stress or damage to a surface, it can be implemented in immersion cooling, with boiling, of electronic equipment components. Such an enhanced surface, which has an increased number of nucleation sites, shows a decreased level of wall superheat under boiling and an increased critical heat flux relative to superheat and critical heat flux values for an untreated surface. Application of this technique results in a decrease of heated surface temperature and a more uniform temperature of the heated surface; both effects are important in immersion cooling of electronic equipment. >

Theoretical aspects of nucleate pool boiling with dielectric liquids

Abstract: Direct cooling with inert, dielectric liquids may well become the technique of choice for the thermal management of future electronic systems. Due to the efficiency of phase-change processes and the simplicity of natural circulation, nucleate pool boiling is of great interest for this application. This paper examines the characteristics of vapor bubbles and nucleate pool boiling of the dielectric liquids. The results provide a theoretical foundation for understanding and interpreting the often complex empirical results reported in the literature.