Multiscale Calculation on Perforated Sheet Structured Packing To Predict the Liquid Distribution Based on Computational Fluid Dynamics Simulation

Liu, Botan; Wen, Yantong; Liu, Chunjiang; Sun, Bo; Yuan, Xin

doi:10.1021/acs.iecr.5b05003

Cited by 7 publications

(7 citation statements)

References 34 publications

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“…To close the Navier–Stokes equation for complex flow behavior inside REUs, the RNG k –ε turbulent model was used according to refs and . The model equations are given as follows: where and η = Sk /ε.…”

Section: Multiscale Methodsmentioning

confidence: 99%

“…Unstructured cells were built in the same way as in ref 49. With the consideration of the structural complexity owing to the windows, refined cells were generated with approximately 600 000 cells for interior REUs and approximately 240 000 cells for the sidewall REUs.…”

Section: Microscale Strategyreus and The Cfd Modelmentioning

confidence: 99%

“…Next, the liquid distribution inside Mellapak 250Y with perforations was successfully predicted. 49 Therefore, the proposed method supplies a technically feasible solution to obtain hydrodynamics inside structured packing from a microscale (mm-scale) to a macroscale (m-scale), which is difficult to detect by experimental methods.…”

Section: Introductionmentioning

confidence: 99%

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Liquid Distribution and Local Hydrodynamics of Winpak: A Multiscale Method

Guo

Liu

et al. 2017

Ind. Eng. Chem. Res.

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A multiscale method for a novel structured packing, Winpak, was developed to study liquid distribution and local hydrodynamics. The method combines a unit network model with the computational fluid dynamics (CFD) method. The unit network model was used to predict the liquid distribution at the macroscale by defining 10 distribution coefficients. The distribution coefficients were obtained based on microscale behavior of liquid distribution which was simulated in six representative elementary units by the CFD method. The VOF model was used to capture the interface between the gas phase and the liquid film. Through simulation results, three flow patterns were observed. In addition, the relatively large liquid holdup and wetting area of Winpak were elucidated. The average film thickness in REUs was also investigated. Furthermore, the liquid distribution obtained from the macroscale model indicates that the windows could mitigate the tendency of liquid flowing toward the sidewall.

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Section: Multiscale Methodsmentioning

confidence: 99%

Section: Microscale Strategyreus and The Cfd Modelmentioning

confidence: 99%

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Liquid Distribution and Local Hydrodynamics of Winpak: A Multiscale Method

Guo

Liu

et al. 2017

Ind. Eng. Chem. Res.

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“…On the other hand, some CFD models have focussed on the details of the gas-liquid flow and mass transfer on the gas-liquid interface of thin liquid films (Albert et al, 2014;Hu et al, 2014;Xie et al, 2017a) and single droplets (Bothe and Fleckenstein, 2013;Ozkan et al, 2016), and these can be regarded as the microscale CFD simulations. Mesoscale CFD studies of a packed bed refer to the CFD simulations of the flow at a scale that is comparable to the dimensions of a typical packing unit (Li et al, 2016;Liu et al, 2016;Raynal and Royon-Lebeaud, 2007;Sebastia-Saez et al, 2015a;Singh et al, 2018;Sun et al, 2013).…”

Section: Cfd Modelling Of the Rpbmentioning

confidence: 99%

A mesoscale 3D CFD analysis of the liquid flow in a rotating packed bed

Xie

Ding

et al. 2019

Chemical Engineering Science

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Rotating packed beds (RPBs), as a type of process intensification technology, are promising to be employed as high-efficiency CO 2 absorbers. However, the detailed understanding of the liquid flow in the RPB is still very limited. The complex and dense packing of the bed and the multiscale of the RPB make it very difficult to perform numerical simulations in detail, in particular for full 3D simulations. In this paper, a mesoscale 3D CFD modelling approach is proposed which can be used to investigate the liquid flow in both laboratory-and large-scale RPBs in detail and accuracy. A 3D representative elementary unit of the RPB has been built and validated with experimental observations, and then it is employed to investigate the gas-liquid flows at different locations, across a typical RPB, so that the overall characteristics of the liquid flow in the RPB can be assembled. The proposed approach enables the detailed prediction of the liquid holdup, droplets formation, effective interfacial area, wetted packing area and specific surface area of the liquid within real 3D packing structures throughout the bed. New correlations to predict the liquid holdup, effective interfacial area, and specific surface area of the liquid are proposed, and the sensitivities of these quantities to the rotational speed, liquid flow rate, viscosity and contact angle have been investigated. The results have been compared with experimental data, previous correlations and theoretical values and it shows that the new correlations have a good accuracy in predicting these critical quantities. Further, recommendations for scale-up and operation of an RPB for CO 2 capture are provided. This proposed model leads to a much better understanding of the liquid flow behaviours and can assist in the RPB optimisation design and scaling up.

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“…Wire knitting not only requires the correct machines, cylinder heads, needles, and spools, but also specific knowledge and experience with material science to ensure the performance and quality of the product. As shown in Figure 1c, a perforated mesh sheet is a sheet metal that has been manually or mechanically stamped or punched to create a pattern of holes, slots, or decorative shapes [28,29]. An expanded mesh sheet is produced in a single piece through the synchronized cutting out and drawing of laminated metal, as shown in Figure 1d.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Mesh Patterns Using a Selective Laser-Melting Process

et al. 2019

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The selective laser-melting (SLM) process can be applied to the additive building of complex metal parts using melting metal powder with laser scanning. A metal mesh is a common type of metal screen consisting of parallel rows and intersecting columns. It is widely used in the agricultural, industrial, transportation, and machine protection sectors. This study investigated the fabrication of parts containing a mesh pattern from the SLM of AISI 304 stainless steel powder. The formation of a mesh pattern has a strong potential to increase the functionality and cost-effectiveness of the SLM process. To fabricate a single-layered thin mesh pattern, laser layering has been conducted on a copper base plate. The high thermal conductivity of copper allows heat to pass through it quickly, and prevents the adhesion of a thin laser-melted layer. The effects of the process conditions such as the laser scan speed and scanning path on the size and dimensional accuracy of the fabricated mesh patterns were characterized. As the analysis results indicate, a part with a mesh pattern was successfully obtained, and the application of the proposed method was shown to be feasible with a high degree of reliability.

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Multiscale Calculation on Perforated Sheet Structured Packing To Predict the Liquid Distribution Based on Computational Fluid Dynamics Simulation

Cited by 7 publications

References 34 publications

Liquid Distribution and Local Hydrodynamics of Winpak: A Multiscale Method

Liquid Distribution and Local Hydrodynamics of Winpak: A Multiscale Method

A mesoscale 3D CFD analysis of the liquid flow in a rotating packed bed

Fabrication of Mesh Patterns Using a Selective Laser-Melting Process

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