Review of pool boiling enhancement by surface modification

A state-of-the-art overview of recent work on boiling and two-phase flows in microchannels are reviewed, focusing primarily on the high points of recent developments. The topics covered include critical heat fluxes and their prediction in microchannels, new two-phase flow pattern maps, flow regimes and visualization in microchannels, boiling phenomena and flow instabilities in multi-microchannel cooling elements, flow boiling prediction methods specifically for microchannels and their comparison to data, trends in flow boiling data in microchannels and mechanisms that may be responsible for the seemingly divergent trends, and two-phase pressure drops in microchannels.

State-of-the-Art Overview of Boiling and Two-Phase Flows in Microchannels

Pool boiling and flow boiling on micro- and nanostructured surfaces

Wettability modification to further enhance the pool boiling performance of the micro nano bi-porous copper surface structure

Heat transfer—A review of 2005 literature

Experimental evaluation of flow boiling incipience of subcooled fluid in a narrow channel

In this paper, attempts were made to experimentally investigate the boiling incipience in a narrow rectangular vertical channel of 1 mm depth with an external 40 mm wide wall heated uniformly and others assumed quasiadiabatic. The “boiling front” location was determined from the temperature distribution of the heated wall obtained from liquid crystal thermography. Boiling incipience occurs when a considerable rise in the wall temperature above the saturation temperature takes place. Thus, boiling incipience is accompanied by “nucleation hysteresis.” The impact of various factors on the boiling incipience in microchannels, such as pressure, the inlet liquid subcooling, and flow velocity, were investigated.

Hysteresis Phenomena at the Onset of Subcooled Nucleate Flow Boiling in Microchannels

Peculiarities of boiling heat transfer on capillary-porous coverings

This paper summarizes the results of the flow boiling heat transfer study with ethanol in a 1.8 mm deep and 2.0 mm wide horizontal, asymmetrically heated, rectangular mini-channel. The test section with the mini-channel was the main part of the experimental stand. One side of the mini-channel was closed with a transparent sight window allowing for the observation of two-phase flow structures with the use of a fast film camera. The other side of the channel was the foil insulated heater. The infrared camera recorded the 2D temperature distribution of the foil. The 2D temperature distributions in the elements of the test section with two-phase flow boiling were determined using (1) the Trefftz method and (2) the hybrid Picard–Trefftz method. These methods solved the triple inverse heat conduction problem in three consecutive elements of the test section, each with different physical properties. The values of the local heat transfer coefficients calculated on the basis of the Robin boundary condition were compared with the coefficients determined with the simplified approach, where the arrangement of elements in the test section was treated as a system of planar layers.

Mieczyslaw E. Poniewski

Papers

Experimental evaluation of flow boiling incipience of subcooled fluid in a narrow channel

Hysteresis Phenomena at the Onset of Subcooled Nucleate Flow Boiling in Microchannels

Peculiarities of boiling heat transfer on capillary-porous coverings

Heat Transfer Coefficient Identification in Mini-Channel Flow Boiling with the Hybrid Picard–Trefftz Method

Semi-analytical approach to boiling heat fluxes calculation in subsurface horizontal and vertical tunnels