Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model

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KLJENAK, Ivo ;MAVKO, Borut .
Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 51, n.7-8, p. 436-444, august 2017. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/simulation-of-void-fraction-profile-evolution-in-subcooled-nucleate-boiling-in-a-vertical-annulus-with-a-bubble-tracking-model/>. Date accessed: 29 may. 2020. 
doi:http://dx.doi.org/.
Kljenak, I., & Mavko, B.
(2005).
Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model.
Strojniški vestnik - Journal of Mechanical Engineering, 51(7-8), 436-444.
doi:http://dx.doi.org/
@article{.,
	author = {Ivo  Kljenak and Borut  Mavko},
	title = {Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {51},
	number = {7-8},
	year = {2005},
	keywords = {Vertical Annulus; Subcooled Nucleate Boiling; Void Fraction; Bubble-Tracking Model; },
	abstract = {A three-dimensional bubble-tracking model of subcooled nucleate boiling flow in a vertical channel at low-pressure conditions is proposed, with specific application to the case of boiling in an annulus with a central heating rod. In the model, vapour is distributed in the liquid in the form of individually tracked bubbles. The overall behaviour of the liquid-vapour system results from motion, interaction, coalescence and boiling mechanisms prescribed mostly at the level of bubbles. The wall heat transfer coefficient and the wall temperature are calculated from one-dimensional correlations. The partitioning of the heat flux, which is consumed for bubble nucleation and heating of the liquid, varies along the flow and depends on bubble size as well as on local flow conditions. Bubbles are nucleated with constant frequencies at fixed nucleation sites randomly distributed over the heated surface. Liquid temperature profiles at different axial locations are determined from steady-state energy balances. The nucleation site density is determined from a balance between vapour generation rate, bubble departure sizes and nucleation frequencies. After nucleation, bubbles slide on the heated surface, detach and then gradually migrate into the low-temperature region away from the heated surface, where they eventually condense. Both bubble detachment and migration are modelled probabilistically. Bubble lateral migration is restricted by the lift force due to the liquid velocity gradient. The proposed model was applied to experiments on subcooled boiling that were carried out at Purdue University (USA) by Bartel [1]. A good agreement between measured and calculated void fraction profiles at different axial locations was obtained.},
	issn = {0039-2480},	pages = {436-444},	doi = {},
	url = {https://www.sv-jme.eu/article/simulation-of-void-fraction-profile-evolution-in-subcooled-nucleate-boiling-in-a-vertical-annulus-with-a-bubble-tracking-model/}
}
Kljenak, I.,Mavko, B.
2005 August 51. Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 51:7-8
%A Kljenak, Ivo 
%A Mavko, Borut 
%D 2005
%T Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model
%B 2005
%9 Vertical Annulus; Subcooled Nucleate Boiling; Void Fraction; Bubble-Tracking Model; 
%! Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model
%K Vertical Annulus; Subcooled Nucleate Boiling; Void Fraction; Bubble-Tracking Model; 
%X A three-dimensional bubble-tracking model of subcooled nucleate boiling flow in a vertical channel at low-pressure conditions is proposed, with specific application to the case of boiling in an annulus with a central heating rod. In the model, vapour is distributed in the liquid in the form of individually tracked bubbles. The overall behaviour of the liquid-vapour system results from motion, interaction, coalescence and boiling mechanisms prescribed mostly at the level of bubbles. The wall heat transfer coefficient and the wall temperature are calculated from one-dimensional correlations. The partitioning of the heat flux, which is consumed for bubble nucleation and heating of the liquid, varies along the flow and depends on bubble size as well as on local flow conditions. Bubbles are nucleated with constant frequencies at fixed nucleation sites randomly distributed over the heated surface. Liquid temperature profiles at different axial locations are determined from steady-state energy balances. The nucleation site density is determined from a balance between vapour generation rate, bubble departure sizes and nucleation frequencies. After nucleation, bubbles slide on the heated surface, detach and then gradually migrate into the low-temperature region away from the heated surface, where they eventually condense. Both bubble detachment and migration are modelled probabilistically. Bubble lateral migration is restricted by the lift force due to the liquid velocity gradient. The proposed model was applied to experiments on subcooled boiling that were carried out at Purdue University (USA) by Bartel [1]. A good agreement between measured and calculated void fraction profiles at different axial locations was obtained.
%U https://www.sv-jme.eu/article/simulation-of-void-fraction-profile-evolution-in-subcooled-nucleate-boiling-in-a-vertical-annulus-with-a-bubble-tracking-model/
%0 Journal Article
%R 
%& 436
%P 9
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 51
%N 7-8
%@ 0039-2480
%8 2017-08-18
%7 2017-08-18
Kljenak, Ivo, & Borut  Mavko.
"Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model." Strojniški vestnik - Journal of Mechanical Engineering [Online], 51.7-8 (2005): 436-444. Web.  29 May. 2020
TY  - JOUR
AU  - Kljenak, Ivo 
AU  - Mavko, Borut 
PY  - 2005
TI  - Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - Vertical Annulus; Subcooled Nucleate Boiling; Void Fraction; Bubble-Tracking Model; 
N2  - A three-dimensional bubble-tracking model of subcooled nucleate boiling flow in a vertical channel at low-pressure conditions is proposed, with specific application to the case of boiling in an annulus with a central heating rod. In the model, vapour is distributed in the liquid in the form of individually tracked bubbles. The overall behaviour of the liquid-vapour system results from motion, interaction, coalescence and boiling mechanisms prescribed mostly at the level of bubbles. The wall heat transfer coefficient and the wall temperature are calculated from one-dimensional correlations. The partitioning of the heat flux, which is consumed for bubble nucleation and heating of the liquid, varies along the flow and depends on bubble size as well as on local flow conditions. Bubbles are nucleated with constant frequencies at fixed nucleation sites randomly distributed over the heated surface. Liquid temperature profiles at different axial locations are determined from steady-state energy balances. The nucleation site density is determined from a balance between vapour generation rate, bubble departure sizes and nucleation frequencies. After nucleation, bubbles slide on the heated surface, detach and then gradually migrate into the low-temperature region away from the heated surface, where they eventually condense. Both bubble detachment and migration are modelled probabilistically. Bubble lateral migration is restricted by the lift force due to the liquid velocity gradient. The proposed model was applied to experiments on subcooled boiling that were carried out at Purdue University (USA) by Bartel [1]. A good agreement between measured and calculated void fraction profiles at different axial locations was obtained.
UR  - https://www.sv-jme.eu/article/simulation-of-void-fraction-profile-evolution-in-subcooled-nucleate-boiling-in-a-vertical-annulus-with-a-bubble-tracking-model/
@article{{}{.},
	author = {Kljenak, I., Mavko, B.},
	title = {Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {51},
	number = {7-8},
	year = {2005},
	doi = {},
	url = {https://www.sv-jme.eu/article/simulation-of-void-fraction-profile-evolution-in-subcooled-nucleate-boiling-in-a-vertical-annulus-with-a-bubble-tracking-model/}
}
TY  - JOUR
AU  - Kljenak, Ivo 
AU  - Mavko, Borut 
PY  - 2017/08/18
TI  - Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 51, No 7-8 (2005): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - Vertical Annulus, Subcooled Nucleate Boiling, Void Fraction, Bubble-Tracking Model, 
N2  - A three-dimensional bubble-tracking model of subcooled nucleate boiling flow in a vertical channel at low-pressure conditions is proposed, with specific application to the case of boiling in an annulus with a central heating rod. In the model, vapour is distributed in the liquid in the form of individually tracked bubbles. The overall behaviour of the liquid-vapour system results from motion, interaction, coalescence and boiling mechanisms prescribed mostly at the level of bubbles. The wall heat transfer coefficient and the wall temperature are calculated from one-dimensional correlations. The partitioning of the heat flux, which is consumed for bubble nucleation and heating of the liquid, varies along the flow and depends on bubble size as well as on local flow conditions. Bubbles are nucleated with constant frequencies at fixed nucleation sites randomly distributed over the heated surface. Liquid temperature profiles at different axial locations are determined from steady-state energy balances. The nucleation site density is determined from a balance between vapour generation rate, bubble departure sizes and nucleation frequencies. After nucleation, bubbles slide on the heated surface, detach and then gradually migrate into the low-temperature region away from the heated surface, where they eventually condense. Both bubble detachment and migration are modelled probabilistically. Bubble lateral migration is restricted by the lift force due to the liquid velocity gradient. The proposed model was applied to experiments on subcooled boiling that were carried out at Purdue University (USA) by Bartel [1]. A good agreement between measured and calculated void fraction profiles at different axial locations was obtained.
UR  - https://www.sv-jme.eu/article/simulation-of-void-fraction-profile-evolution-in-subcooled-nucleate-boiling-in-a-vertical-annulus-with-a-bubble-tracking-model/
Kljenak, Ivo, AND Mavko, Borut.
"Simulation of Void Fraction Profile Evolution in Subcooled Nucleate Boiling in a Vertical Annulus with a Bubble-Tracking Model" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 51 Number 7-8 (18 August 2017)

Authors

Affiliations

  • Institute Jožef Štefan, Ljubljana, Slovenia
  • Institute Jožef Štefan, Ljubljana, Slovenia

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 51(2005)7-8, 436-444

A three-dimensional bubble-tracking model of subcooled nucleate boiling flow in a vertical channel at low-pressure conditions is proposed, with specific application to the case of boiling in an annulus with a central heating rod. In the model, vapour is distributed in the liquid in the form of individually tracked bubbles. The overall behaviour of the liquid-vapour system results from motion, interaction, coalescence and boiling mechanisms prescribed mostly at the level of bubbles. The wall heat transfer coefficient and the wall temperature are calculated from one-dimensional correlations. The partitioning of the heat flux, which is consumed for bubble nucleation and heating of the liquid, varies along the flow and depends on bubble size as well as on local flow conditions. Bubbles are nucleated with constant frequencies at fixed nucleation sites randomly distributed over the heated surface. Liquid temperature profiles at different axial locations are determined from steady-state energy balances. The nucleation site density is determined from a balance between vapour generation rate, bubble departure sizes and nucleation frequencies. After nucleation, bubbles slide on the heated surface, detach and then gradually migrate into the low-temperature region away from the heated surface, where they eventually condense. Both bubble detachment and migration are modelled probabilistically. Bubble lateral migration is restricted by the lift force due to the liquid velocity gradient. The proposed model was applied to experiments on subcooled boiling that were carried out at Purdue University (USA) by Bartel [1]. A good agreement between measured and calculated void fraction profiles at different axial locations was obtained.

Vertical Annulus; Subcooled Nucleate Boiling; Void Fraction; Bubble-Tracking Model;