Modeling of Upward Subcooled Flow Boiling of Refrigerant-113 in a Vertical Annulus

Instability of subcooled boiling film on a vertical wall

Consider a vertical plate with a leading edge. The temperature of the plate is above the spontaneous nucleation temperature, so that vapor completely covers the plate. Two-dimensional quasi-parallel theory is used to examine the stability of the two-phase system. Numerical calculations show that the main parameter determining the thickness of the vapor film and its stability is the difference b...

Development of a Numerical Model for Subcooled Boiling Flow

Population balance equations combined with a threedimensional two-fluid model are employed to predict bubbly flows with the presence of heat and mass transfer processes. Subcooled boiling flow belongs to this specific category of bubbly flows is considered. The MUSIG (MUltiple-SIze-Group) model implemented in CFX4.4 is further developed to account for the wall nucleation and condensation in the...

Subcooled two-phase flow boiling in a microchannel heat sink: comparison of conventional numerical models

Subcooled flow boiling in multi-microchannels can be used as an efficient thermal management approach in compact electrical devices. Highly subcooled flow boiling of HFE 7100 is studied in two microchannel heat sinks to choose a proper numerical model for simulating boiling flows in microchannels. Results of five different numerical models, including Volume of Fluid (VOF), Eulerian boiling, Eul...

Critical Heat Flux in Subcooled Flow Boiling of Water

Experimental measurement of heat transfer coefficient and mass of deposited CaSO4 in subcooled flow boiling condition

Fouling is a common, fundamental and costly problem in heat transfer systems, which reduces thermal efficiency of equipment, increases the energy loss and causes strong damage to the heat transfer equipment in various industries. The main causes of fouling on the heat transfer surfaces are salts with inverse temperature-solubility in the fluid which calcium sulfate is one of the most important ...

Critical heat flux in subcooled flow boiling of fluorocarbon liquid on a simulated electronic chip in a vertical rectangular channel

Experiments are performed to correlate and model CHF during subcooled flow boiling of dielectric fluoro~rbon (FC-72) liquid on a smooth 12.7 x 12.7 mm* sirn~at~ electronic chip inside a vertical rectangular channel. Two distinct CHF regimes are established based on flow visualization and experimental data. At low flow velocities, CHF is accompanied by the formation of a continuous vapor blanket...