Dispersion behaviors of droplet impacting on wire mesh and process intensification by surface micro/nano-structure

Su, Meng-Jun; Luo, Yong; Chu, Guang‐Wen; Cai, Yong; Le, Yuan; Zhang, Liangliang; Chen, Jianfeng

doi:10.1016/j.ces.2020.115593

Cited by 31 publications

(32 citation statements)

References 43 publications

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“…

g_{c}

is the rotational acceleration;

U

is the liquid flow rate per unit area;

γ

is the kinematic viscosity of the liquid;

φ

is the contact angle between the water and the wire mesh packing. In this work,

φ

is taken as

70 °

, which is obtained from the Su et al experimental data 51 …”

Section: Model Developmentmentioning

confidence: 99%

Modeling of gas–liquid flow in a rotating packed bed using an Eulerian multi‐fluid approach

Zhang

Xie²,

et al. 2022

AIChE Journal

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Rotating packed beds (RPBs) are ideal candidates for CO2 removal from offshore natural gas due to their good mass transfer performance and significant volume savings. This article proposes an Eulerian multi‐fluid approach to simulate the gas–liquid flow in RPBs. Three new multiphase drag force models are constructed based on single‐phase drag force models for wire mesh packings. Based on the Eulerian multi‐fluid approach, a new RPB simulation framework is developed. The predicted results using the new simulation framework with the new drag force models are compared with the experimental data. When using the Kołodziej model and the modified Kołodziej model, the predicted overall liquid holdup shows good agreement with the experimental data with errors less than 20%. In addition, the pressure drop predicted by these three models are reasonable compared with the experimental data. This work lays a foundation for RPB simulation of gas–liquid flow using Eulerian multi‐fluid approach.

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“…

g_{c}

is the rotational acceleration;

U

is the liquid flow rate per unit area;

γ

is the kinematic viscosity of the liquid;

φ

is the contact angle between the water and the wire mesh packing. In this work,

φ

is taken as

70 °

, which is obtained from the Su et al experimental data 51 …”

Section: Model Developmentmentioning

confidence: 99%

Modeling of gas–liquid flow in a rotating packed bed using an Eulerian multi‐fluid approach

Zhang

Xie²,

et al. 2022

AIChE Journal

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show abstract

“…When a liquid jet impacted on the wire mesh, the liquid was splashed with a composite velocity that can be divided into vertical velocity ( u v ) and horizontal velocity ( u h ). As shown in Figure b, the cone angle can be expressed as where α is the liquid ejection angle and could be calculated as …”

Section: Resultsmentioning

confidence: 99%

“…The surface morphology is an important factor that influences wettability . As shown in Figure a, there was spherical and block-like morphology on the surface of SSM where some anomalous ravines were on the surface of NSM . Typically, the hydrophobicity has been closed to unique micro- or nano-structures on the surface.…”

Section: Resultsmentioning

confidence: 99%

“…25 As shown in Figure 12a, there was spherical and block-like morphology on the surface of SSM where some anomalous ravines were on the surface of NSM. 18 Typically, the hydrophobicity has been closed to unique micro-or nano-structures on the surface. It has two models to describe the liquid state on the solid surface: Wenzel model 26 and Cassie model.…”

Section: Experimental and Analysis Methodsmentioning

confidence: 99%

“…In the RPB, the liquid was injected to the packing, then sheared into tiny liquid elements of droplets, films, and so forth. , In our previous work, the hydrophobicity of the wire mesh has been proven to generate a better initial liquid distribution at the inner packing zone of a RPB, which could enhance the mass transfer and micromixing process . Besides optimizing the macrostructure and types of packing, recent advancements in the surface modification at micro-scale of the wire mesh packing for liquid dispersion enhancement provide a promising direction for further improvement of the reactor performance. − …”

Section: Introductionmentioning

confidence: 99%

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Mechanism of Liquid Dispersion Enhancement by the Hydrophobic Wire Mesh at Macro- and Micro-Scale

Zhang

Liao

et al. 2021

Ind. Eng. Chem. Res.

Self Cite

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The hydrophobic surface-modified stainless steel wire mesh (SSM) has been proven to enhance the liquid dispersion effectively, which has a significant impact on the mass transfer and micromixing performance. Therefore, the mechanism of liquid dispersion enhancement by SSM is significantly valuable. However, the mechanism of liquid dispersion enhancement by SSM has not been revealed up to now. In this work, hydrodynamics of the liquid flow pattern and liquid velocity field of liquid jet impacting on SSM were observed and analyzed, aiming to elucidate the intensification mechanism at macro-and micro-scale. The cone angle of SSM could be reached ∼80°with a daughter droplet diameter of ∼1.7 mm. The cone angle was enlarged by 60%, and the daughter droplet diameter was 20% smaller from SSM with smaller fiber and opening. Results of liquid velocity field showed that the better liquid dispersion by SSM mainly resulted from the larger horizontal velocity, which was up to −0.5 to 0.7 m/s by SSM compared with −0.1 to 0.1 m/s by NSM. A mechanism of liquid dispersion enhancement by SSM was suggested and validated as follows: the wettability of wire mesh affected the flow pattern by various velocity fields to form different cone angles at macro-scale; the micro− nano structure on SSM retained the liquid with the Cassie model, which led to smaller dissipation energy. More energy was transformed to the surface and kinetic energy of daughter droplets with a smaller diameter. This work provided an insight into liquid dispersion enhancement by surface modification, which can guide the rational liquid dispersion design.

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Numerical studies of dynamic behavior of liquid film on single-layer wire mesh with different wettabilities

Liao

Jiang

et al. 2022

Front. Chem. Sci. Eng.

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Dispersion behaviors of droplet impacting on wire mesh and process intensification by surface micro/nano-structure

Cited by 31 publications

References 43 publications

Modeling of gas–liquid flow in a rotating packed bed using an Eulerian multi‐fluid approach

Modeling of gas–liquid flow in a rotating packed bed using an Eulerian multi‐fluid approach

Mechanism of Liquid Dispersion Enhancement by the Hydrophobic Wire Mesh at Macro- and Micro-Scale

Numerical studies of dynamic behavior of liquid film on single-layer wire mesh with different wettabilities

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