Hydrodynamics of the vortex tray

Deryagina, N. V.; Войнов, Н. А.; Земцов, Д. А.; Богаткова, А. В.

doi:10.1016/j.tsep.2020.100524

Cited by 7 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Swirlers with profiled channel walls [23,24] in some cases eliminate the above drawback and contribute to intense flow swirling with a relatively simple device design.…”

Section: Methodsmentioning

confidence: 99%

Experimental Study and Numerical Simulation of Hydrodynamic Parameters of Tangential Swirlers

et al. 2022

Self Cite

View full text Add to dashboard Cite

This paper presents and patents new profiled- and annular-channel tangential swirlers with 1.8–3 times less hydraulic drag coefficient compared to swirlers with straight channel walls at the same flow rate, respectively. The results of numerical simulation of the gas velocity and pressure profiles for tangential swirler channels of different structures are presented. The modelling was carried out with the help of OpenFOAM software using the k-ε turbulence model. It is found that the shape of the velocity profile at the channel inlet has a decisive influence on the swirler drag coefficient. The greatest contribution to the total drag coefficient of the tangential swirler is made by the pressure drop at the channel inlet compared to the pressure drop at the channel wall and the channel outlet. The experimental dependencies of the tangential swirlers’ drag coefficient on the Reynolds number with a gas criterion of 2000–20,000 and the following structural channel parameters: width 1, 2–9 mm, height 1, 5–10 mm, number 5–45 units, inclination angle 0–45° are presented. The experimental data were compared with the modelling calculations and the convergence of data was achieved. The generalized dependence for the measurement of the hydraulic drag coefficient of three types of tangential swirlers considering the effect made by the geometric parameters (flow rate, width and height of the channel, wall inclination angle) on the pressure drop has been determined; it can be useful at the unit design stage as it allows for reducing the calculation time of the swirler parameters.

show abstract

“…Swirlers with profiled channel walls [23,24] in some cases eliminate the above drawback and contribute to intense flow swirling with a relatively simple device design.…”

Section: Methodsmentioning

confidence: 99%

Experimental Study and Numerical Simulation of Hydrodynamic Parameters of Tangential Swirlers

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The total energy consumption per unit liquid holdup volume can be calculated as follows: (18) where W input represents the total energy input power. Based on the concept that the gas flow is the primary energy input to the system, P input can be determined as (19) In this equation, ΔP represents the pressure drop, ρ G is the density of the gas phase, v in is the superficial gas velocity at the circumferential wall, and v out is the superficial gas velocity near the center of the chamber. In Figure 5, positions I and II are measurement points for the pressure and gas velocity.…”

Section: Energy Consumption Assessmentmentioning

confidence: 99%

“…The resulting gas–liquid reactor is termed a gas–liquid vortex unit (GLVU). Voinov et al. − studied the gas–liquid hydrodynamics in a rotating gas–liquid layer. The interfacial area in the vortex bubbling layer was found to vary in the range of 1800–3000 m –1 .…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of Gas–Liquid Vortex Unit Using Computational Fluid Dynamics (CFD) Simulation

Chen,

Malego,

Van Geem

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Due to the exceptional multiphase mixing and mass transfer performance, gas–liquid vortex units (GLVUs) have great potential for solvent-based applications such as CO2 capture. The high gas flow rates needed to provide the energy input for creating the centrifugal field negatively influence the contact between phases and the efficiency of the GLVU. To address this issue, computational fluid dynamics (CFD) simulations are used to optimize the design of the GLVU geometry and its operating conditions. The gas–liquid flow characteristics, contact time, and total energy consumption in different GLVU geometries are analyzed. The effects of geometrical changes including reactor shape, reactor volume, and gas–liquid inlet configuration are investigated. In the optimized GLVU designs, the gas–liquid contact time is increased by more than a factor of 3, while the energy consumption is reduced by 85%, compared to the base case. Structural optimization of a GLVU is an effective route to improve the gas–liquid contact time. The use of CFD significantly accelerates the optimization of the design of a GLVU geometry for subsequent manufacturing.

show abstract