Digital computer simulation of dropwise condensation from equilibrium droplet to detectable size

Burnside, B. M.; Hadi, H.

doi:10.1016/s0017-9310(98)00372-x

Cited by 43 publications

(14 citation statements)

References 13 publications

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“…The droplet distribution follows the random principle owing to the droplet radium ratio of adjacent generations is 1.25. The result shows that the simulation result of random droplet distribution produced by COMSOL with MATLAB is in very good agreement with experimental result represented by Burnside and Hadi [17] and Wu et al [18].…”

Section: Introductionsupporting

confidence: 85%

Dynamic Behavior of Droplets and Flashover Characteristics for CFD and Experimental Analysis on SiR Composites

Liu

Kong

et al. 2019

IEEE Access

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The dynamic mechanism of water droplet formation has recently drawn considerable attention in research and application toward silicon rubber composite insulators. This paper is aimed at numerical simulations and experiments on the dynamic mechanism of water droplet formation with different applied voltages and droplet distribution and induced surface discharges on the insulator surface under the impact of AC electric field. The computational fluid dynamics model and experimental setup of multiple droplets were established to analyze the dynamic behavior of droplets and flashover characteristics. The obtained results reveal that the fusion first occurs between larger size droplets and the fusion is hard to happen along with the rise of the fractal dimension (FD) of droplet distribution. The elongation of droplets merges with more droplets and finally affects the electric field distribution on the insulator surface. With the increase of FD, the maximum electric field intensity shows an increasing tendency. Meanwhile, the experimental results show that with the increase of electric field intensity, the droplet fusion phenomenon becomes more obvious, which is consistent with the simulation results. The flashover voltage on the surface of silicon rubber decreases with the decrease of the FD of droplets, indicating that the complexity of droplet distribution has a significant effect on the flashover voltage. INDEX TERMS Droplet elongation, flashover voltage, discrete droplet, sir composite, fractal dimension.

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Section: Introductionsupporting

confidence: 85%

Dynamic Behavior of Droplets and Flashover Characteristics for CFD and Experimental Analysis on SiR Composites

Liu

Kong

et al. 2019

IEEE Access

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“…In previous simulations, the primary droplet distribution was frequently monodispersity [21,36,37]. However, no proof hitherto demonstrated the initial droplets are identical in size at the beginning of condensation.…”

Section: Polydispersity Of the Primary Droplet Distributionmentioning

confidence: 90%

Time-averaged droplet size distribution in steady-state dropwise condensation

Mei

Han

et al. 2015

International Journal of Heat and Mass Transfer

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“…Droplet growth mainly depends on the direct condensation of steam on the droplet surface at the initial stage of condensation. However, when the droplet size reaches the combined critical size, the combination between adjacent droplet is the main way for droplet growth [11][12].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of condensation heat transfer characteristics and corrosion resistance on coated tube surfaces

Wang

2021

THERM SCI

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The condensation heat transfer characteristics and corrosion resistance of copper, Ni-P-Cu, polytetrafluoroethylene, Ni-P and Ni coated tube surfaces were investigated. The results indicate that condensation heat transfer coefficient of Ni-P-Cu, PTFE, Ni-P and Ni coated tubes grows by 36.8%?29.3%, 19.6% and 7.5% than that of copper tubes, respectively. The phase structure of Ni, Ni-P, Ni-P-Cu and PTFE coated tube surfaces is mixed crystal structure(nanocrystals-based), mixed crystal structure (amorphous-based), amorphous structure and crystal structure, respectively. Compared with Ni coating and Ni-P coated tube surfaces, the condensation droplets outside Ni-P-Cu and PTFE coated tubes are smaller in size, more densely distributed, and fall off more quickly, which can significantly promote dropwise condensation. Ni-P-Cu coated tube surfaces achieve optimal condensation heat transfer. The corrosion speed of copper, Ni, Ni-P, Ni-P-Cu and PTFE coated tubes are 86.5, 42.6, 18.2, 10.7 and 6.1 mg?dm-2?d-1, respectively. PTFE coating tubes have the optimal corrosion resistance. Ni-P-Cu and PTFE coated tube surfaces have the best condensation heat transfer characteristics and corrosion resistance, and can be well used in the recovery of waste heat from low-temperature flue gas. The multiple linear regression of the experimental data was carried out to obtain the experimental correlation formula for Nusselt number of convective condensation composite heat transfer for different coated tubes. The relative error between the predicted value and the experimental value is within ?15%.

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Digital computer simulation of dropwise condensation from equilibrium droplet to detectable size

Cited by 43 publications

References 13 publications

Dynamic Behavior of Droplets and Flashover Characteristics for CFD and Experimental Analysis on SiR Composites

Dynamic Behavior of Droplets and Flashover Characteristics for CFD and Experimental Analysis on SiR Composites

Time-averaged droplet size distribution in steady-state dropwise condensation

Experimental investigation of condensation heat transfer characteristics and corrosion resistance on coated tube surfaces

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