Experimental Study of Pool Boiling Critical Heat Flux on Thin Wires under Various Gravities

Fang, Xiande; Zheng, Lingling; He, Yan; Li, Gen; Bi, Minghua; Yang, Bei; Wang, Xi

doi:10.1007/s12217-019-9688-z

Cited by 9 publications

(7 citation statements)

References 30 publications

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“…Similar results could also be found in the simulation by Ma et al (2017) and experiments by Raj et al (2010). Besides, the gravity influences on CHF have also been studied in previous research studies (Raj et al, 2010;Ma et al, 2017;Fang et al, 2019), and the results showed that higher gravity within a certain range could increase CHF.…”

Section: Introductionsupporting

confidence: 84%

Numerical Investigation of Pool Boiling Under Ocean Conditions with Lattice Boltzmann Simulation. Part Ⅰ: Heaving Condition

Zou

Liu

et al. 2021

Front. Energy Res.

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Pool boiling is the heat-transfer mechanism of many heat exchangers inside ocean nuclear power plants working under the complex marine circumstances. Also, ocean conditions will create a new acceleration field other than gravity for the fluid, which induces some unique thermal–hydraulic characteristics. In this study, pool boiling under heaving conditions is numerically simulated using multiple relaxation time phase change lattice Boltzmann method. Firstly, the simulated results under static condition have been validated with recognized empirical equations, such as Rohsenow’s correlation at nucleate boiling, Zuber’s model, and Kandlikar’s model about critical heat flux (CHF). Then, pool boiling patterns, the boiling curve of time-averaged heat flux, transient heat flux, and heaving effects on different pool boiling regions are investigated. The results show that pool boiling curves of time-averaged heat flux between heaving conditions and static conditions with middle superheat degrees are similar. Heat transfer under heaving conditions at low superheat is somewhat enhanced, and it is weakened at high superheat, which leads to a slightly smaller critical heat flux with larger superheat compared with that under static conditions. Moreover, distinct fluctuation of the transient heat flux of pool boiling under heaving conditions is found for all boiling regimes. Furthermore, the heaving condition shows both positive and negative effects on pool boiling heat transfer at high-gravity and low-gravity regions, respectively. Besides, both the larger heaving height and shorter period time bring out more violent heaving motion and make a greater impact on pool boiling heat transfer.

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Section: Introductionsupporting

confidence: 84%

Numerical Investigation of Pool Boiling Under Ocean Conditions with Lattice Boltzmann Simulation. Part Ⅰ: Heaving Condition

Zou

Liu

et al. 2021

Front. Energy Res.

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show abstract

“…Consequently, the heater experiences a significant rise in temperature together with a drop in the critical heat flux (CHF). The same observations have been reported in numerous studies on pool boiling with different heater's geometries, test liquids [7][8][9][10][11][12], and microgravity platforms [13][14][15][16]. These works are extensively reviewed by Mudawar et al [17] and Colin et al [18].…”

Section: Introductionsupporting

confidence: 65%

Gravity-Independent Oscillate Boiling

Nguyen

Supponen

Miao

et al. 2019

Microgravity Sci. Technol.

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Heat transfer in nucleate boiling relies on 1 the detachment and rise of the boiling bubble, in which 2 gravity plays the dominant role. Previous studies showed 3 that in the absence of gravity, the bubble fails to rise, 4 causing the dryout of the heater and significantly reduc-5 ing the thermal efficiency of nucleate boiling. Recently, 6 a new boiling regime termed oscillate boiling was dis-7 covered. By localizing thermal energy as high as 50 mW 8 into an area as small as 15 × 15 µm 2 , a boiling bubble is 9 formed and oscillate at high frequency while remaining 10 pinned at the heating spot. This regime was proposed to 11 be independent of buoyancy as its operation does not 12 involves the detachment and rise of the boiling bub-13 ble. To test this hypothesis, we compared experimental 14 observations of oscillate boiling in low gravity, normal

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“…Introduction with a drop in the critical heat flux (CHF). The same observations have been reported in numerous studies on pool boiling with different heater's geometries, test liquids [71][72][73][74][75][76], and microgravity platforms [77][78][79][80]. These works are extensively reviewed by Mudawar et al [81] and Colin et al [82].…”

Section: Resultssupporting

confidence: 67%

The physics of oscillate boiling

Nguyen¹

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Experimental Study of Pool Boiling Critical Heat Flux on Thin Wires under Various Gravities

Cited by 9 publications

References 30 publications

Numerical Investigation of Pool Boiling Under Ocean Conditions with Lattice Boltzmann Simulation. Part Ⅰ: Heaving Condition

Numerical Investigation of Pool Boiling Under Ocean Conditions with Lattice Boltzmann Simulation. Part Ⅰ: Heaving Condition

Gravity-Independent Oscillate Boiling

The physics of oscillate boiling

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