Enhanced Heat Rejection of Microscale Geometries in Convective Flow Boiling Evaporators

Convective Heat Transfer of Binary Mixtures under Flow Boiling Conditions

The present study represents part of an effort in considering the replacement of ethylene-glycol/water mixtures with propyleneglycol/water mixtures for engine cooling in automotive application. Experimental results are presented for the heat transfer coeffic ient under flow boiling conditions for water and mixtures of water with ethylene-glycol and propylene-glycol. The range covered includes t...

Flow Boiling Heat Transfer in Microchannel Cold Plate Evaporators for Electronics Cooling

The local two-phase heat transfer coefficient is a critical parameter in the design of microchannel cold plate evaporators used in applications such as electronics cooling systems. Only a few past studies on microchannels have investigated the heat transfer characteristics over the entire vapor quality range and conflicting trends have been reported even in these studies. Therefore, the present...

A Model for Correlating Flow Boiling Heat Transfer in Augmented Tubes and Compact Evaporators

The additive model for the convective and nucleate boiling components originally suggested by Bergles and Rohsenow (1964) for subcooled and low-quality regions was employed in the Kandlikar correlation (1990a) for flow boiling in smooth tubes. It is now extended to augmented tubes and compact evaporators. Two separate factors are introduced in the convective boiling and the nucleate boiling ter...

Flow Patterns During Convective Boiling in Microchannels

Two-Phase Flow Patterns, Pressure Drop, and Heat Transfer during Boiling in Minichannel Flow Passages of Compact Evaporators

The small hydraulic diameters employed during  ow boiling in compact evaporator passages are becoming more important in diverse applications including electronics cooling and fuel cell evaporators. The high pressure drop characteristics of these passages are particularly important as they alter the  ow and heat transfer, especially in parallel multichannel conŽgurations. The pressure drop osc...