Computational fluid dynamics studies of dry and wet pressure drops in structured packings

Hosseini, Seyyed Hossein; Shojaee, Saeed; Ahmadi, Goodarz; Zivdar, Mortaza

doi:10.1016/j.jiec.2012.02.012

Cited by 65 publications

(31 citation statements)

References 42 publications

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“…where C 1e = 1.44, C 2e = 1.92, C m = 0.09, s k = 1, and s e = 0.77 [34]. Another popular two-equation model is the low-Reynolds standard k-w model proposed by Wilcox [46].…”

Section: Numerical Simulation 41 Governing Equations and Numerical Pmentioning

confidence: 99%

“…Moreover, they employed k-e, k-w, renormalization group (RNG) k-e, and BSL turbulence models with Reynolds numbers between 200 and 1900. Recently, Hosseini et al applied CFD simulation to study the hydrodynamics [34] and evaluated the effective area [35] of two structured packings known as Gempak 2A and Sulzer BX. Two-and three-dimensional numerical studies were carried out and the results showed that the k-w model provided a satisfactory trend to analyze the flow through structured packings.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and Numerical Simulation of Dry Pressure Drop in High‐Capacity Structured Packings

Amini

Karimi-Sabet²,

Esfahany

2016

Chem Eng & Technol

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Experimental and numerical studies were conducted on the performance and capacity of structured packings for mixture separation with very low separation factor. Different formations and conditions of the innovative structured packing PACK-2100 with high surface area were studied to evaluate the main characteristics such as dry pressure drop. In addition, numerical simulation was performed to describe the details of the flow structure in these modified structured packings. Three-dimensional computational fluid dynamics modeling of PACK-2100 allowed for comparing the pressure drop in both laminar and turbulent flow regime. The obtained experimental and numerical data demonstrate the potential contribution of the packing to high-efficiency systems with low separation factor.

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“…where C 1e = 1.44, C 2e = 1.92, C m = 0.09, s k = 1, and s e = 0.77 [34]. Another popular two-equation model is the low-Reynolds standard k-w model proposed by Wilcox [46].…”

Section: Numerical Simulation 41 Governing Equations and Numerical Pmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulation of Dry Pressure Drop in High‐Capacity Structured Packings

Amini

Karimi-Sabet²,

Esfahany

2016

Chem Eng & Technol

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“…The work presents velocity and concentration fields in a criss-cross section of Mellapak 350.Y. Hosseini et al (2012) Micro-scale CFD Two-dimensional VOF simulation. The validity of the correlations between dry and wet pressure drops is checked.…”

Section: Computational Modelmentioning

confidence: 99%

Micro-scale CFD modeling of reactive mass transfer in falling liquid films within structured packing materials

Sebastia‐Saez

Ranganathan

et al. 2015

International Journal of Greenhouse Gas Control

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Post-combustion carbon capture in structured packing columns is considered as a promising technology to reduce greenhouse gas (GHG) emissions because of its maturity and the possibility of being retrofitted to existing power plants. CFD plays an important role in the optimization of this technology. However, due to the current computational capacity limitations, the simulations need to be divided into three scales (i.e. micro-, meso- and macro-scale) depending on the flow characteristics to be analyzed. This study presents a 3D micro-scale approach to describe the hydrodynamics and reactive mass transfer of the CO2-MEA chemical system within structured packing materials. Higbie's penetration theory is used to describe the mass transfer characteristics whereas enhancement factors are implemented to represent the gain in the absorption rate attributable to the chemical reaction. The results show a detrimental effect of the liquid load on the absorption rate via a decrease in the enhancement factor. The evolution of the wetted area for MEA solutions is compared to the case of pure water highlighting the differences in the transient behavior. The CO2 concentration profiles are examined showing the capability of the model to reproduce the depletion of the solute within the bulk liquid ascribed to the high value of the Hatta number. Also, several approaches on the reaction mechanism such as reversibility and instantaneous behavior are assessed. The results from micro-scale are to be used in meso-scale analysis in future studies to optimize the reactive absorption characteristics of structured packing materials

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“…Worldwide, structured packing has equipped approximately 25% of all the refinery vacuum towers (Brunazzin and Paglianti 1997). Compared to the traditional trays and random packings, they feature moderately high surface area and void fraction that lead to the improvement of mass transfer performance and capacity of the columns with relatively low-pressure drop (Hosseini et al 2012). Other advantages of structured packings compared with the conventional dumped packings are higher separation efficiency, better radial mixing, lower pressure drop and higher capacity.…”

Section: Packed Bed Columnsmentioning

confidence: 99%

“…Due to the aforementioned disadvantages of structured packings, it is necessary to increase the separation efficiency and decrease capital cost in order to obtain a suitable design of these columns (Hosseini et al 2012). Hence, various studies to increase the columns efficiency have been done.…”

Section: Packed Bed Columnsmentioning

confidence: 99%

Computational Fluid Dynamics-Based Hydrodynamics Studies in Packed Bed Columns: Current Status and Future Directions

Malang

Perumal

Saptoro

2015

International Journal of Chemical Reactor Engineering

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A careful review of the literature reveals that extensive research has been done on the hydrodynamics in packed bed columns using turbulence models. It can be noted that the choice of turbulence model is influenced by the number of phases, type of fluid, Reynolds number range and the type of packing. Thus, comparison of turbulence models for the selection of a suitable model assumes great importance for the better prediction of flow pattern. This is due to the fact that poor prediction of the flow pattern can lead to a limited heat and mass transfer model as the rate of transfer processes in packed bed is governed by the hydrodynamics of the packed bed. The aim of this paper is to give a review of the computational fluid dynamics (CFD)-based hydrodynamics studies of packed bed columns with the primary interest of studying pressure drop and drag coefficient in packed beds. From the literature survey in Science Direct database, more than 48,000 papers related to packed bed columns have been published with more than 3,000 papers focused on the hydrodynamic studies of the bed to date. Unfortunately, there are only a few studies reported on the hydrodynamics of packed columns under supercritical fluid condition. Therefore, it is imperative that the future work has to focus on the hydrodynamics of supercritical packed column and particularly on the selection of suitable turbulence model.

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Computational fluid dynamics studies of dry and wet pressure drops in structured packings

Cited by 65 publications

References 42 publications

Experimental and Numerical Simulation of Dry Pressure Drop in High‐Capacity Structured Packings

Experimental and Numerical Simulation of Dry Pressure Drop in High‐Capacity Structured Packings

Micro-scale CFD modeling of reactive mass transfer in falling liquid films within structured packing materials

Computational Fluid Dynamics-Based Hydrodynamics Studies in Packed Bed Columns: Current Status and Future Directions

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