A numerical study of the mechanism of liquid film spread and distribution on spherical particles including wall effects

Mo, Hanyang; He, Guangping; Zhang, Rongrong; Jin, Haibo; Du, Wei; Liu, Hao

doi:10.1016/j.powtec.2020.07.076

Cited by 7 publications

(2 citation statements)

References 53 publications

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“…Once the model was selected, the next step in simulating the above experiment was the construction of the geometry and mesh. To avoid the wall effect, , the spherical particle (7.18 mm) was placed in the center of the 15 × 15 × 15 (mm) computational domain. The particle surface was set as a wall with a specific contact angle.…”

Section: Methodsmentioning

confidence: 99%

“…Du et al 39 assessed the effects of gas and liquid velocity on the liquid flow process around a spherical particle, confirming that gas or liquid velocity can affect the liquid film thickness. Mo et al 40 investigated the wall effect and highlighted its critical role in producing an uneven distribution of the liquid film on the particle surface. Mitra et al 41 explored the droplet-spreading process with the dimensionless parameter "Weber number"; they found that the maximum contact area increases with increasing Weber number.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Liquid Flow Characteristics on a Single Spherical Particle for Trickle Bed Reactor

Wei,

Shi,

Guo

et al. 2023

Ind. Eng. Chem. Res.

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Liquid distribution plays a crucial role in the performance of the trickle bed reactor (TBR). Therefore, understanding the flow behavior of a droplet impacting a spherical catalyst particle in the TBR is essential for the design and operation of the reactor. In this study, the volume of fluid (VOF) model was used to investigate this phenomenon. The simulation results revealed two distinctive flow patterns: a uniform liquid film flow pattern and a droplet flow pattern. To quantitatively evaluate the two flow patterns, a postprocessing method was proposed based on the Fibonacci sequence. The results indicate that the uniform liquid film flow pattern can maintain larger total gas–liquid interfacial area and specific interfacial area (thinner liquid film) for a longer residence time compared to the droplet flow pattern, demonstrating that the uniform liquid film flow pattern is a promising way to optimize the TBR performance. To facilitate the formation of a uniform liquid film on the particle, using liquids with smaller contact angles, lower surface tension, and adjusting the droplet/particle size ratio to a suitable range can be suggested.

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Section: Methodsmentioning

confidence: 99%