An energy model for the transient flow boiling crisis under highly subcooled conditions at atmospheric pressure

2021 ◽  
Vol 168 ◽  
pp. 107042
Author(s):  
R. Nop ◽  
M.-C. Duluc ◽  
N. Dorville ◽  
A. Kossolapov ◽  
F. Chavagnat ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Transient Flow ◽  
Flow Boiling ◽  
Energy Model ◽  
Boiling Crisis

FLOW BOILING CRISIS IN GROOVED BOILER-TUBES

1974 ◽  
Author(s):  
Kaneyasu Nishikawa ◽  
Tetsu Fujii ◽  
Suguru Yoshida ◽  
Masaki Ohno
Keyword(s):  
Flow Boiling ◽  
Boiling Crisis ◽  
Boiler Tubes

The Flow Boiling Crisis of Saturated Water in Pipes at High Pressures

2020 ◽  
Vol 67 (6) ◽  
pp. 349-354
Author(s):  
M. V. Minko ◽  
V. V. Yagov ◽  
S. S. Savekin
Keyword(s):  
High Pressures ◽  
Flow Boiling ◽  
Boiling Crisis ◽  
Saturated Water

scholarly journals 1-D Modelling and 3-D Simulation of Confined Bubble Formation and Pressure Fluctuations During Flow Boiling in a Microchannel With a Rectangular Cross-Section of High Aspect Ratio

2009 ◽  
Author(s):  
S. Gedupudi ◽  
Y. Q. Zu ◽  
T. G. Karayiannis ◽  
D. B. R. Kenning ◽  
Y. Y. Yan
Keyword(s):  
Aspect Ratio ◽  
Cross Section ◽  
High Aspect Ratio ◽  
Transient Flow ◽  
Flow Boiling ◽  
Rectangular Cross Section ◽  
Computing Time ◽  
Pressure Fluctuations ◽  
Design Tool ◽  
D Model

A simple 1-D model with low requirements for computing time is required to investigate parametric influences on the potentially adverse effects of pressure fluctuations driven by confined vapour bubble growth in microchannel evaporative cooling systems operating at high heat fluxes. A model is developed in this paper for the particular conditions of a channel of rectangular cross-section with high aspect ratio with a constant inlet flow rate (zero upstream compressibility). (The model will later be extended to the conditions of finite upstream compressibility that lead to transient flow reversal). Some parametric trends predicted by the model are presented. The simplifying assumptions in the model are examined in the light of a 3-D simulation by a commercial CFD code, described in an accompanying paper by the same authors. The predictions of pressure changes are in reasonable agreement. It is suggested that the 1-D model will be a useful design tool.

The Onset of Nucleate Boiling in a Micro-Channel Subjected to a Pulsed Heat Flux

2011 ◽  
Author(s):  
Hee Joon Lee ◽  
Eric A. Browne ◽  
Yoav Peles ◽  
Michael K. Jensen
Keyword(s):  
Transient Flow ◽  
Numerical Study ◽  
Flow Boiling ◽  
Solid Material ◽  
Nucleate Boiling ◽  
Micro Channel ◽  
Channel Diameter ◽  
Pulsed Heating ◽  
Vof Model ◽  
Large Channel

A numerical study of subcooled onset of nucleate boiling (ONB) in a micro-channel under pulsed heating using the volume of fluids (VOF) model was conducted. The ONB time was determined when the void fraction at the microheater surface starts to exist. A smooth thin Pt heater was located between the water in the channel and the solid material. The theoretical superheat for homogeneous nucleation did not predict the transient ONB results of convective flow of water. Once heat load increases at the heater, transient flow boiling starts to occur. From a parametric study, it was found that the time constant increases with large substrate thermal diffusivity, low Reynolds number, and large channel diameter.

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