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Showing 1 to 18 of 18 for “"Volume-of-fluid Method"”.
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A Study of the Volume of Fluid Method for Moving Boundary Problems
<p>Moving boundary problems are often encountered in engineering and science. One of the methods to solve such problems numerically is the volume of fluid (VOF) method. The VOF method uses an additional field variable/to track the interface using the Eulerian fixed grid. In this work, the VOF …
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Direct computations of marangoni driven flows using a volume of fluid method
The volume of fluid (VoF) interface tracking methods have been used for simulating a wide range of interfacial flows. An improved accuracy of the surface tension force computation has enabled the VoF method to become widely used for simulating flows driven by the surface tension force. A general …
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Two-Phase Flow at the Pore-Scale Using the Volume of Fluid Method
The aim of this thesis is to use digital rock physics for understanding flow through porous media. Pore-scale simulations were conducted using the Finite Volume method to solve the Navier-Stokes equations, and the Volume of Fluid method for capturing interface. A workflow is provided, in which …
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An Algebraic Volume of Fluid Method for Strongly Coupled Spacecraft Fuel Slosh Modelling
The increase in the number of commercial space missions has resulted in the increased need for efficient and effective spacecraft designs. A key contributor to the accuracy of space vehicle simulation is the prediction of fuel slosh loads during in-orbit manoeuvres, particularly due to the large …
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Numerical simulation and modeling of two-phase flows using the volume-of-fluid method
Two-phase flows are of great interest in natural and industrial applications such as cavitation, spray atomization, and bubbly flows. As a two-phase system grows in complexity, analytical approximations of fluid behavior and experimental observations become more challenging. To make the detailed …
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Numerical Simulation of an Open Channel Ultraviolet Waste-water Disinfection Reactor
The disinfection characteristics of an open channel ultra-violet (UV) wastewater disinfection reactor are investigated using a computational fluid dynamics (CFD) model. The model is based on the volume of fluid method to capture the water-air interface, the Lagrangian particle tracking method to …
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A Numerical Study of the Flow and Heat Transfer in the Near Field of a Cylindrical Bubble Moving in a Narrow Channel
A direct numerical simulation is performed of a cylindrical bubble moving in a pressure-driven flow of Novec-649 in a heated channel. The upper wall is an electrically heated metal foil, and the bubble diameter is on the order of the channel spacing. Phase change is not included to isolate the …
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Numerical Simulation of Corium Jet Fragmentation
… for understanding the environmental impact of nuclear power following the Three Mile Island (TMI) accident. Severe accident phenomena are interdisciplinary since they can include the interaction of molten corium with reactor structures and water, and the transport and release of fission …
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Direct numerical simulation of bubble-bubble and droplet-droplet interaction using a Surface Thin Film model
This dissertation deals with the simulation of dispersed multiphase flow. The particle-particle and particle-fluid interactions in this class of flows play an important role on the hydrodynamics and fluid transport phenomena that govern the overall flow behaviour. Accurate computational modelling …
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Micro-Scale Simulation of Evaporation, Condensation and Transport in Porous Media
Sub-pore scale modeling of flow in porous media is gaining momentum. The concept of Digital Core Analysis deals with measurements of virtual core and the purpose of such modeling is to replace conventional and special core analysis when the latter are not feasible. One of the challenging concepts …
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A computational fluid dynamics study of two-phase flows in the presence of surfactants
<p>Drop formation in co-flowing fluids and drops rising in a tube are important in applications such as microencapsulation and enhanced oil recovery. A hybrid volume-of-fluid method with a front-tracking scheme is developed to study two-phase flows in the presence of surfactants at finite Reynolds …
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Ambit of Multiphase CFD in Modelling Transport Processes Related to Oil Spill Scenario and Microfluidics
… the deep sea in 2010, about 4.9 million barrels of oil was released into the Gulf of Mexico, making the spill one of the worst ocean spills in recent times. To mitigate the ill effects of the event on the environment, subsea injection of dispersants was carried out. Dispersant addition lowers the …
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Measurement and Modelling of Soft Solid Layers in Cleaning Applications
… to understand fouling and cleaning mechanisms, methods are required to quantify soft solid soil or deposit characteristics by measuring these in situ. This dissertation describes the development of millimanipulation and two new fluid dynamic gauging (FDG) devices, namely sideways FDG (SiDG) and …
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Numerical Study of Metamaterial-Inspired Water Wave Control Technologies
… risks to coastal communities. On the other, they offer a vast but largely untapped source of sustainable energy. Addressing these challenges requires innovative solutions that integrate coastal protection with wave energy development. The application of electromagnetic metamaterial concepts to …
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Multi-physics and Multilevel Fidelity Modeling and Analysis of Olympic Rowing Boat Dynamics
… approach for the modeling and analysis of the performance of Olympic rowing boats is presented. The goal is to establish methodologies and tools that would determine the effects of variations in applied forces and rowers motions and weights on mean surge speed and oscillatory boat …
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Potencial energético de las corrientes generadas por las mareas en las desembocaduras de los ríos y estuarios. Aplicación a la ría de Avilés
… dominio bifásico se resuelve mediante el modelo VOF (Volume of Fluid), y se utiliza el modelo k para la modelización turbulenta. Los resultados obtenidos, para las mareas vivas y muertas, son: Altura de la lámina de agua Ciclos de velocidad media Perfiles de velocidades Potencia y …
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Phase-field modeling of liquids splitting between separating surfaces and its application to high-resolution roll-based printing technologies
… roll-based printing systems, controlled release of liquid ink to the substrate surface is achieved through the transport of the liquid ink through a series of ink transfer rollers in the form of splitting liquid bridges. An in-depth understanding of the liquid transport process through the ink …
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Computation of the rise or fall of a drop through a suspending liquid with no mass transfer: Axisymmetric, transitional and complex regimes
We investigate the buoyant motion of a liquid drop through a suspending liquid for three different liquid-liquid pairs and different drop sizes, covering a range of parameter space including axisymmetric, transitional and complex regimes, in cases for which there is no mass transfer between the …