Searched for: subject%3A%22Volume%255C+of%255C+fluid%22
(1 - 20 of 33)

Pages

document
Akbar Ahmadi, Ali (author), Hooman, K. (author), Rahbari, Alireza (author)
Automatic icemakers are integrated into refrigerators to ensure a consistent ice supply and improve energy efficiency. Despite these advantages, a thorough investigation of the automatic icemaking process in domestic refrigerator-freezers is lacking in the literature. This study aims at assessing the performance of automatic icemaking process...
journal article 2024
document
El Mellas, I. (author), Samkhaniani, N. (author), Falsetti, C. (author), Stroh, A. (author), Icardi, M. (author), Magnini, M. (author)
Micro-pin-fin evaporators are a promising alternative to multi-microchannel heat sinks for two-phase cooling of high power-density devices. Within pin-fin evaporators, the refrigerant flows through arrays of obstacles in cross-flow and is not restricted by the walls of a channel. The dynamics of bubbles generated upon flow boiling and the...
journal article 2024
document
Chang, X. (author), Wellens, P.R. (author)
The lack of suitable boundary conditions in practical surface wave simulations with maritime structures in current or at forward speed may cause energy in the computational domain to accumulate due to spurious wave reflection. The common way to prevent wave reflection is to use passive wave absorbers, such as damping zones or relaxation zones...
journal article 2024
document
Sudha, A. (author), Rohde, M. (author)
The lattice-Boltzmann method (LBM) is becoming increasingly popular for simulating multi-phase flows on the microscale because of its advantages in terms of computational efficiency. Many applications of the method are restricted to relatively simple geometries. When a more complex geometry is considered—circular and inclined microchannels...
journal article 2024
document
van der Eijk, M. (author), Wellens, P.R. (author)
A new bilinear interface reconstruction algorithm (BLIC) is presented to capture highly-curved interfaces more accurately on structured grids without a significant increase in computational costs compared to the standard piecewise linear interface calculation (PLIC) methods. The new reconstruction algorithm uses the initial PLIC segment and...
journal article 2024
document
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
document
Pál, Botond (author), Roekaerts, D.J.E.M. (author), Zandbergen, B.T.C. (author)
This study investigates the potential of a newly released multi-phase solver to simulate atomisation in an air-blast type atomiser. The 'VOF-to-DPM' solver was used to simulate primary and secondary atomisation in an atomiser with a coaxial injector-like geometry. The solver uses a hybrid Eulerian/Eulerian-Lagrangian formulation with...
journal article 2021
document
Karageorgiou, Traianos (author)
The graduation project was conducted at the CFD department of Nuclear Research And Consultancy Group (NRG) in Petten. The modeling and simulation of Taylor bubble flow using CFD can contribute significantly to the topic of nuclear reactor safety and in particular, in the emergency cooling of nuclear reactors during a loss of coolant accident, or...
master thesis 2020
document
den Ouden-van der Horst, D. (author), Möller, M. (author)
Many physical phenomena can be described as the evolution of two phases coexisting within the same domain. Examples of such phenomena are the transport of gas and oil, solidification and phase transformations. Each of these phenomena require a description of the dynamics under which the phases change and a technique for tracking the interface...
report 2020
document
Wellens, P.R. (author), Borsboom, Mart (author)
The boundaries of numerical domains for free-surface wave simulations with marine structures generate spurious wave reflection if no special measures are taken to prevent it. The common way to prevent reflection is to use dissipation zones at the cost of increased computational effort. On many occasions, the size of the dissipation area is...
journal article 2020
document
van der Leij, Maarten (author)
When propellers are operating near the free surface,  phenomenon called ventilation might occur. Due to insufficient immersion and high thrust loading, the propeller draws air, resulting in a reduced thrust. Reduced thrust may have consequences such as loss of propulsive power, control and steerability, and may therefore be...
master thesis 2019
document
Pols, Daniel (author)
In solving two-phase flows, the location of the interface between the phases is necessary to handle interface jump conditions when solving the Navier-Stokes equation. Current interface capturing and advection methods, however, suffer from various issues. The level set method uses the signed distance to the interface and the interface being the...
master thesis 2019
document
Jia, Kangjun (author)
The transport of highly-viscous oil in the core-annular flow regime in a horizontal pipe is investigated with a numerical simulation study. In this flow type the viscous oil is lubricated by a water annulus along the pipe wall. The Launder-Sharma low-Reynolds number k-ε turbulence model is used with the Volume-of-Fluid solver in interFOAM. Three...
master thesis 2018
document
van der Eijk, Martin (author)
A substantial part of structural damage for conventional vessels is caused by complex free surface events like slamming, breaking waves and green water. These events lead to the interaction of air and water where air can be entrained in water. The resulting air bubbles can considerably affect the evolution of the pressure caused by hydrodynamic...
master thesis 2018
document
Mukherjee, S. (author), Zarghami, A. (author), Haringa, C. (author), van As, K. (author), Kenjeres, S. (author), van den Akker, H.E.A. (author)
While various multiphase flow simulation techniques have found acceptance as predictive tools for processes involving immiscible fluids, none of them can be considered universally applicable. Focusing on accurate simulation of liquid-liquid emulsions at the scale of droplets, we present a comparative assessment of the single-component...
journal article 2018
document
Oud, G.T. (author)
This research entails the numerical simulation of physical flow instabilities that can occur in two-phase pipe flows with a new efficient algorithm. The fluids are assumed to be immiscible, and the flow is incompressible and isothermal in a straight circular pipe section with a certain inclination. The numerical algorithm that was developed...
doctoral thesis 2017
document
Hageman, Tim (author)
Heat transfer is important in many applications. For instance, due to the decrease in size of electronics, it<br/>becomes more necessary to have efficient and smaller cooling systems. In order to increase the effect of the<br/>cooling liquids used, it might be interesting to add extra solid particles with a high conductivity, to possibly<br/...
master thesis 2017
document
Patel, H.V. (author), Das, S. (author), Kuipers, J.A.M. (author), Padding, J.T. (author), Peters, E.A.J.F. (author)
journal article 2017
document
Raees, F. (author)
doctoral thesis 2016
document
Duz, B. (author)
The PhD study focused on two topics. The first topic was energy dissipation in wave propagation. The wave dissipation can be caused by physical and/or numerical phenomena, such as the free surface treatment, physical viscosity and artificial viscosity due to discretization of the momentum equations. Among these the free surface treatment is an...
doctoral thesis 2015
Searched for: subject%3A%22Volume%255C+of%255C+fluid%22
(1 - 20 of 33)

Pages