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Two-phase flow metering of maldistribution inside a header by means of venturi flowmeter solely

Lecardonnel, A. (author), de Servi, C.M. (author), Colonna, Piero (author), Laboureur, D. (author)

In evaporators, the distribution of the liquid and vapor phases among the channels is a convoluted problem, depending on a wide range of parameters. However, maldistribution causes important losses of performance. Due to their complexity, the accurate modeling of such two-phase flows is difficult to handle. Hence, experimental studies are...

journal article 2024

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Investigating Effects of Heterogeneity and Fracture Distribution on Two-Phase Flow in Fractured Reservoir with adaptive time strategy

Wang, Lu Yu (author), Chen, Wei Zhong (author), Zhang, Yan Jun (author), Zhang, Xiao Dong (author), Vuik, Cornelis (author)

Modeling of fluid flow in porous media is a pillar in geoscience applications. Previous studies have revealed that heterogeneity and fracture distribution have considerable influence on fluid flow. In this work, a numerical investigation of two-phase flow in heterogeneous fractured reservoir is presented. First, the discrete fracture model is...

journal article 2023

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Formation of droplets in microfluidic cross-junctions at small capillary numbers: Breakdown of the classical squeezing regime

Kurniawan, Tetuko (author), Sahebdivani, Mahsa (author), Zaremba, Damian (author), Blonski, Slawomir (author), Garstecki, Piotr (author), van Steijn, V. (author), Korczyk, Piotr M. (author)

Two decades of research on droplet formation in microchannels have led to the widely accepted view that droplets form through the squeezing mechanism when interfacial forces dominate over viscous forces. The initially surprising finding that the volume of the droplets is insensitive to the relative importance of these two forces is nowadays...

journal article 2023

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Modelling gas fracturing in saturated clay samples using triple-node zero-thickness interface elements

Liaudat, J. (author), Dieudonné, A.A.M. (author), Vardon, P.J. (author)

Geological Disposal Facilities (GDF) for radioactive waste will generally rely on clay-rich materials as a host geological formation and/or engineered barrier. Gas will be produced within the GDF, which can build up significant gas pressure and will activate the migration of gas through the clay materials via different transport mechanisms....

journal article 2023

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Two-phase free-surface flow interaction with moving bodies using a consistent, momentum preserving method

van der Eijk, M. (author), Wellens, P.R. (author)

The numerical prediction of two-phase flows with an interface is challenging, to a considerable extent because of the high density ratio at the interface. Numerical results become affected by momentum losses, diverging spurious interface velocities, free surface distortion, and even numerical instability. To prevent issues like these,...

journal article 2023

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A unified framework for Navier-Stokes Cahn-Hilliard models with non-matching densities

ten Eikelder, M.F.P. (author), Van Der Zee, K. G. (author), Akkerman, I. (author), Schillinger, D. (author)

Over the last decades, many diffuse-interface Navier-Stokes Cahn-Hilliard (NSCH) models with non-matching densities have appeared in the literature. These models claim to describe the same physical phenomena, yet they are distinct from one another. The overarching objective of this work is to bring all of these models together by laying down...

journal article 2023

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An efficient adaptive implicit scheme with equivalent continuum approach for two-phase flow in fractured vuggy porous media

Wang, L. (author), Golfier, Fabrice (author), Tinet, Anne-Julie (author), Chen, Weizhong (author), Vuik, Cornelis (author)

This work investigates numerical method and equivalent continuum approach (ECA) of fluid flow in fractured porous media. The commonly used discrete fracture model (DFM) without upscaling needs full discretization of all fractures. It enjoys the merit of capturing each fracture accurately but will get in trouble with mesh partition and low...

journal article 2022

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Intrusive and non-intrusive two-phase air-water measurements on stepped spillways: A physical study

Arosquipa Nina, Yvan (author), Shi, Rui (author), Wüthrich, D. (author), Chanson, Hubert (author)

Self-aerated free-surface flow studies have a more recent history compared to classical fluid dynamics. Traditional velocimetry techniques are adversely affected by the presence of gas–liquid interfaces. In the present study, detailed air-water flow measurements were performed in a highly turbulent free-surface flow, and three velocimetry...

journal article 2022

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An Advanced Discrete Fracture Methodology for Fast, Robust, and Accurate Simulation of Energy Production From Complex Fracture Networks

de Hoop, S. (author), Voskov, D.V. (author), Bertotti, G. (author), Barnhoorn, A. (author)

Fracture networks are abundant in subsurface applications (e.g., geothermal energy production, CO₂ sequestration). Fractured reservoirs often have a very complex structure, making modeling flow and transport in such networks slow and unstable. Consequently, this limits our ability to perform uncertainty quantification and increases...

journal article 2022

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A novel diffuse-interface model and a fully-discrete maximum-principle-preserving energy-stable method for two-phase flow with surface tension and non-matching densities

ten Eikelder, M.F.P. (author), Akkerman, I. (author)

Two well-established classes of the interface capturing models are the level-set and phase-field models. Level-set formulations satisfy the maximum principle for the density but are not energy-stable. On the other hand, phase-field models do satisfy the second law of thermodynamics but lack the maximum principle for the density. In this paper...

journal article 2021

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Microchannel Thermal Management System with Two-Phase Flow for Power Electronics over 500 W/cm²Heat Dissipation

Hou, F. (author), Zhang, Hengyun (author), Huang, Dezhu (author), Fan, J. (author), Liu, Fengman (author), Lin, Tingyu (author), Cao, Liqiang (author), Fan, Xuejun (author), Ferreira, Braham (author), Zhang, Kouchi (author)

In this article, a microchannel thermal management system (MTMS) with the two-phase flow using the refrigerant R1234yf with low global warming potential is presented. The thermal test vehicles (TTVs) were made of either single or multiple thermal test chips embedded in the substrates, which were then attached to the MTMS. The system included...

journal article 2020

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Electrical resistance tomography for control applications: Quantitative study of the gas-liquid distribution inside a cyclone

Sattar, Muhammad Awais (author), Martinez Garcia, M. (author), Banasiak, Robert (author), Portela, L. (author), Babout, Laurent (author)

Phase separation based centrifugal forces is effective, and thus widely explored by the process industry. In an inline swirl separator, a core of the light phase is formed in the center of the device and captured further downstream. Given the inlet conditions, this gas core created varies in shape and size. To predict the separation behavior...

journal article 2020

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Characterising the two-phase flow and mixing performance in a gas-mixed anaerobic digester: Importance for scaled-up applications

Wei, P. (author), Mudde, R.F. (author), Uijttewaal, W.S.J. (author), Spanjers, H. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)

This study aimed to characterise the gas-liquid flow and mixing behaviour in a gas-mixed anaerobic digester by improving phase interaction modelling using Computational Fluid Dynamics (CFD). A 2D axisymmetric model validated with experimental data was set up using an Eulerian-Eulerian method. Uncertainty factors, including bubble size, phase...

journal article 2019

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Two-phase vertical downward flow in plate heat exchangers: Flow patterns and condensation mechanisms

Toa, X. (author), Nuijten, Menno P. (author), Infante Ferreira, C.A. (author)

This study presents a literature review of work related to the two-phase flow patterns of vertical downward flow in plate heat exchangers with corrugated chevron plates. An understanding of these flow patterns is crucial for developing accurate models of plate heat exchangers functioning as condensers or absorbers. Flow pattern maps of the...

journal article 2018

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Manufacturing a Micro-model with Integrated Fibre Optic Pressure Sensors

Zarikos, I. M. (author), Hassanizadeh, SM (author), van Oosterhout, L. M. (author), van Oordt, W.P. (author)

The measurement of fluid pressure inside pores is a major challenge in experimental studies of two-phase flow in porous media. In this paper, we describe the manufacturing procedure of a micro-model with integrated fibre optic pressure sensors. They have a circular measurement window with a diameter of 260 (Formula presented.), which enables...

journal article 2018

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Numerical modelling of finite-size particle collisions in a viscous fluid

Brändle de Motta, J.C. (author), Breugem, W.P. (author), Gazanion, B. (author), Estivalezes, J.L. (author), Vincent, S. (author), Climent, E. (author)

A general model is presented for short-range hydrodynamic interactions and head-on particle-particle/wall collisions. The model has been embedded in two distinct numerical methods for fully resolved simulation of finite-size particles in a viscous fluid. It accounts for the material properties of the particles and lubrication effects prior to...

journal article 2013

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The effect of interface movement and viscosity variation on the stability of a diffusive interface between aqueous and gaseous CO2

Meulenbroek, B.J. (author), Farajzadeh, R. (author), Bruining, J. (author)

Carbon dioxide injected in an aquifer rises quickly to the top of the reservoir and forms a gas cap from where it diffuses into the underlying water layer. Transfer of the CO2 to the aqueous phase below is enhanced due to the high density of the carbon dioxide containing aqueous phase. This paper investigates the behavior of the diffusive...

journal article 2013

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On the fabrication of PDMS micromodels by rapid prototyping, and their use in two-phase flow studies

Karadimitriou, N.K. (author), Musterd, M. (author), Kleingeld, P.J. (author), Kreutzer, M.T. (author), Hassanizadeh, S.M. (author), Joekar-Niasar, V. (author)

Micromodels have been increasingly employed in various ways in porous media research, to study the pore-scale behavior of fluids. Micromodels have proven to be a valuable tool by allowing the observation of flow and transport at the micron scale in chemical, biological, and physical applications. They have helped to improve our insight of flow...

journal article 2013

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Block-and-break generation of microdroplets with fixed volume

Van Steijn, V. (author), Korczyk, P.M. (author), Derzsi, L. (author), Abate, A.R. (author), Weitz, D.A. (author), Garstecki, P. (author)

We introduce a novel type of droplet generator that produces droplets of a volume set by the geometry of the droplet generator and not by the flow rates of the liquids. The generator consists of a classic T-junction with a bypass channel. This bypass directs the continuous fluid around the forming droplets, so that they can fill the space...

journal article 2013

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On the levitation force in horizontal core-annular flow with a large viscosity ratio and small density ratio

Ooms, G. (author), Pourquie, M.J.B.M. (author), Beerens, J.C. (author)

A numerical study has been made of horizontal core-annular flow: the flow of a high-viscosity liquid core surrounded by a low-viscosity liquid annular layer through a horizontal pipe. Special attention is paid to the question how the buoyancy force on the core, caused by a density difference between the core and the annular layer, is...

journal article 2013