scholarly journals Bubble dynamics and dry spot formation during boiling on a hierarchical structured surface: A lattice Boltzmann study

2021 ◽  
Vol 33 (8) ◽  
pp. 083306
Author(s):  
Y. Yu ◽  
Q. Li ◽  
Y. Qiu ◽  
R. Z. Huang
Keyword(s):  
Lattice Boltzmann ◽  
Bubble Dynamics ◽  
Structured Surface ◽  
Dry Spot ◽  
Spot Formation

Numerical Simulation of Bubble Dynamics in Subcooled Boiling Along Inclined Structured Surface

2021 ◽  
Vol 35 (1) ◽  
pp. 16-27
Author(s):  
Bo Dong ◽  
Yajin Zhang ◽  
Xun Zhou ◽  
Cong Chen ◽  
Weizhong Li
Keyword(s):  
Numerical Simulation ◽  
Bubble Dynamics ◽  
Subcooled Boiling ◽  
Structured Surface

AMADEUS Project and Microscopic Simulation of Boiling Two-Phase Flow by the Lattice-Boltzmann Method

1997 ◽  
Vol 08 (04) ◽  
pp. 843-858 ◽  
Author(s):  
Yasuyoshi Kato ◽  
Koji Kono ◽  
Takeshi Seta ◽  
Daniel Martínez ◽  
Shiyi Chen
Keyword(s):  
Phase Transition ◽  
Gas Phase ◽  
Lattice Boltzmann ◽  
Bubble Dynamics ◽  
Two Phase Flow ◽  
Phase Interface ◽  
Lattice Boltzmann Model ◽  
Phase Flow ◽  
Two Phase ◽  
Boltzmann Model

A two-dimensional lattice-Boltzmann model with a hexagonal lattice is developed to simulate a boiling two-phase flow microscopically. Liquid-gas phase transition and bubble dynamics, including bubble formation, growth and deformation, are modeled by using an interparticle potential based on the van der Waals equation of state. Thermohydrodynamics is incorporated into the model by adding extra velocities to define temperature. The lattice-Boltzmann model is solved by a finite difference scheme so that numerical stability can be ensured at large discontinuity across the liquid-gas phase boundary and the narrow phase interface thickness can be attained. It is shown from numerical simulations that the model has the ability to reproduce phase transition, bubble dynamics and thermohydrodynamics while assuring numerical instability and narrow phase interface.

Pore-Scale Simulation on Pool Boiling Heat Transfer and Bubble Dynamics in Open-Cell Metal Foam by Lattice Boltzmann Method

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Jie Qin ◽  
Zhiguo Xu ◽  
Xiaofei Ma
Keyword(s):  
Heat Transfer ◽  
Lattice Boltzmann ◽  
Boiling Heat Transfer ◽  
Bubble Dynamics ◽  
Metal Foam ◽  
Pool Boiling ◽  
Open Cell ◽  
Pool Boiling Heat Transfer ◽  
Boltzmann Method ◽  
Foam Thickness

Abstract Based on the newly developed geometrical model of open-cell metal foam, pool boiling heat transfer in open-cell metal foam, considering thermal responses of foam skeletons, is investigated by the phase-change lattice Boltzmann method (LBM). Pool boiling patterns are obtained at different heat fluxes. The effects of pore density and foam thickness on bubble dynamics and pool boiling heat transfer are revealed. The results show that “bubble entrainment” promotes fluid mixing and bubble sliding inside metal foam. Based on force analysis, the sliding bubble is pinned on the heating surface and cannot lift off completely at high heat flux due to the increasing surface tension force. Pool boiling heat transfer coefficient decreases with increasing pore density and foam thickness due to high bubble escaping resistance.

Dry Spot Formation and Changes in Liquid Composite Molding: II—Modeling and Simulation

1996 ◽  
Vol 30 (13) ◽  
pp. 1475-1493 ◽  
Author(s):  
K. Han ◽  
L. J. Lee ◽  
S. Nakamura ◽  
A. Shafi ◽  
D. White
Keyword(s):  
Modeling And Simulation ◽  
Liquid Composite Molding ◽  
Composite Molding ◽  
Dry Spot ◽  
Spot Formation

scholarly journals Bubble Dynamics in Turbulent Duct Flows: Lattice-Boltzmann Simulations and Drop Tower Experiments

2018 ◽  
Vol 30 (4) ◽  
pp. 525-534 ◽  
Author(s):  
Pau Bitlloch ◽  
Xavier Ruiz ◽  
Laureano Ramírez-Piscina ◽  
Jaume Casademunt
Keyword(s):  
Lattice Boltzmann ◽  
Bubble Dynamics ◽  
Drop Tower ◽  
Lattice Boltzmann Simulations

On the Effect of Velocity Profile Type on the Thermocapillary Deformation of Locally Heated Thin Liquid Film

2010 ◽  
Vol 5 (2) ◽  
pp. 69-74
Author(s):  
Pavel A. Kuibin ◽  
Oleg V. Sharypov
Keyword(s):  
Velocity Profile ◽  
Liquid Film ◽  
Film Flow ◽  
Thin Liquid Film ◽  
Parabolic Velocity Profile ◽  
Gravity Driven ◽  
Dry Spot ◽  
Steady State Problem ◽  
Long Wave Approximation ◽  
Spot Formation

Differences in the temperature field and deformation of locally heated thin liquid film are studied theoretically for various velocity profiles: parabolic velocity profile in the case of gravity-driven film flow, and uniform one in the case of moving heat source in zero-gravity conditions. Conjugate (hydrodynamic and heat) two-dimensional steady-state problem is solved using long-wave approximation. It is shown that under equal other conditions the flow with uniform velocity profile is characterized by dramatic increase in the thermocapillary deformation of the free surface. At the same time this regime possesses higher stability for dry spot formation comparatively with the shear-driven flow regime.

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