Numerical study on saturated pool boiling heat transfer in presence of a uniform electric field using lattice Boltzmann method

Abstract This paper reports our numerical studies on pool boiling heat transfer from a plane and with protruding surface using single component pseudo-potential phase change model of lattice Boltzmann method. The surface protrusions are assumed to be rectangular in shape with a given height and width. The surface protrusions are seen to promote nucleation of bubbles from the heated surface resulting in significantly higher heat transfer rates compared to the plane surface. Spatial and temporal averaged heat fluxes from all these protruding surfaces are found to be 3–4 times higher than that of a plane surface. The effects of the protrusion height, width, spacing, and associated geometrical parameters on surface heat flux have been investigated in order to arrive at an optimal design for maximum heat transfer.

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Numerical simulation of pool boiling heat transfer on smooth surfaces with mixed wettability by lattice Boltzmann method

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2014.08.092 ◽

2015 ◽

Vol 80 ◽

pp. 206-216 ◽

Cited By ~ 48

Author(s):

Shuai Gong ◽

Ping Cheng

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Lattice Boltzmann Method ◽

Lattice Boltzmann ◽

Boiling Heat Transfer ◽

Pool Boiling ◽

Smooth Surfaces ◽

Pool Boiling Heat Transfer ◽

Mixed Wettability ◽

Boltzmann Method

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

Journal of Heat Transfer ◽

10.1115/1.4048734 ◽

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.

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Simulation of Boiling Heat Transfer at Different Reduced Temperatures with an Improved Pseudopotential Lattice Boltzmann Method

Symmetry ◽

10.3390/sym12081358 ◽

2020 ◽

Vol 12 (8) ◽

pp. 1358

Author(s):

Matheus dos Santos Guzella ◽

Luiz Eduardo Czelusniak ◽

Vinícius Pessoa Mapelli ◽

Pablo Fariñas Alvariño ◽

Gherhardt Ribatski ◽

...

Keyword(s):

Heat Transfer ◽

Reynolds Number ◽

Lattice Boltzmann Method ◽

Lattice Boltzmann ◽

Boiling Heat Transfer ◽

Flow Boiling ◽

Pool Boiling ◽

Numerical Results ◽

Boltzmann Method ◽

Nucleation Growth

The pseudopotential Lattice Boltzmann Method has attracted much attention in the recent years for the simulation of boiling heat transfer. Many studies have been published recently for the simulation of the bubble cycle (nucleation, growth and departure from a heated surface). This paper puts forward two-dimensional simulations of bubble nucleation, growth and departure using an improved pseudopotential Lattice Boltzmann Model from the literature at different reduced temperatures, Tr=0.76 and Tr=0.86. Two different models using the Bhatnagar–Gross–Krook (BGK) and the Multiple-Relaxation-Time (MRT) collision operators with appropriate forcing schemes are used. The results for pool boiling show that the bubbles exhibit axial symmetry during growth and departure. Numerical results of departure diameter and release period for pool boiling are compared against empirical correlations from the literature by varying the gravitational acceleration. Reasonable agreement is observed. Nucleate boiling trends with heat flux are also captured by the simulations. Numerical results of flow boiling simulations are compared by varying the Reynolds number for both reduced temperatures with the MRT model. It was found that the departure diamenter and release period decreases with the increase of the Reynolds number. These results are a direct effect of the drag force. Proper conclusions are commented at the end of the paper.

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