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Showing 1 to 20 of 45 for “"free-surface flows"”.
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Singularities in Free Surface Flows
Free surface flows where the shape of the interface separating two or more phases or liquids are unknown apriori, are commonplace in industrial applications and nature. Distribution of drop sizes, coalescence rate of drops, and the behavior of thin liquid films are crucial to understanding and …
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Free surface flows over submerged obstructions
Steady and unsteady two-dimensional free surface flows subjected to one or multiple disturbances are considered. Flow configurations involving either a single fluid or two layers of fluid of different but constant densities, are examined. Both the effects of gravity and surface tension are …
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Computational analysis of viscoelastic free surface flows
… tracking techniques one of which includes surface tension effects. These techniques are the Scalar Equation Algorithm (SEA) and the Level Set Method (LSM). With both techniques the algorithms are able to take into account flow effects from both fluids (ie. air and polymer) in a two-fluid …
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Numerical Treatment of Laminar Free Surface Flows
Made available in DSpace on 2014-12-10T17:57:50Z (GMT). No. of bitstreams: 1 6808181.pdf: 2269108 bytes, checksum: 957fc24e1fb70a670db03ffd7d160e58 (MD5) Previous issue date: 1967
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Inference and Entropy in Free-Surface Flows
In spite of the ubiquity of free-surface flows across both nature and industry, theoretical and numerical modelling remains challenging. Continuum flows, whether Newtonian or Non-Newtonian, are governed by the Navier–Stokes equations, whilst the particle-particle interactions within a granular flow …
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Numerical study of nonlinear free-surface flows
Nonlinear free-surface flows generated by the motion of a surface-piercing body in an ideal fluid are studied. A numerical scheme employing a mixed Eulerian-Lagrangian approach and involving time stepping is used to simulate the flow. At each time step, the boundary value problem is solved using …
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Galerkin method to model thin free surface flows
Viscoelastic thin films with free surface are important in industry as well as in nature. However, there does not exist a robust and systematic framework to analyze such films. Lubrication approximations, largely successful in studying thin generalized Newtonian fluid flows, have been employed to …
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A WC-MPS Model for Viscous Free Surface Flows
… decades, but they will fail in the simulation of free surface flow problems due to the large deformation and fragmentation, and they suffer from some problems whose objects are a set of discrete physical particles (rather than a continuum). On the contrary, mesh-less particle methods (MPMs), or …
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Finite element simulations of steady viscoelastic free-surface flows
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1996.
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Analysis of the smoothed particle hydrodynamics method for free-surface flows
… gas explosions, and granular flows that has demonstrated ability to simulate highly non-linear free-surface flows including wave overturning, jets, and the formation of spray and droplets. Despite the increasing popularity and promise of the method, SPH has a number of key …
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Simulation of free-surface flows and development of an improved particle method
Undergoing development for decades, the mesh-free methods, both Smoothed Particle Hydrodynamics (SPH) and the Moving Particle Semi-implicit method (MPS), have become useful numerical tools for studying free-surface flows in various engineering problems. They are able to easily simulate complicated …
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Variational multiscale method for coupled systems: free-surface flows and stratified turbulence
… two classes of coupled systems are considered: free-surface flows with a sharp interface marker and stratified turbulence with a smooth temperature field. The additional nonlinearity introduced by the active scalar field to the nonlinear Navier-Stokes equation system is effectively accounted for …
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Sensitivity Analysis of Turbulent Free-Surface Flows Applied to Optimal Casting Rigging Design
… was shown to be appropriate for the types of flows encountered in casting mold filling, and is able to capture the key features of the filling patterns.
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A Legendre spectral element method for simulation of incompressible unsteady viscous free-surface flows
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1989.
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A one-way coupled DEM-CFD scheme to mode free-surface flows in tumbling mills
… industry for accurate prediction of slurry flows in tumbling mills. This flow is currently best understood through empirical, mechanistic and computational models. In the case of computational models, a realistic description of the system requires two fluid phases (for slurry and air) and …
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Numerical Solution of the One-dimensional and Cylindrical Serre Equations for Rapidly Varying Free Surface Flows
Rapidly-varying free surface flows that arise, for example, from; rapid reservoir releases, dam-breaks, mud slides, tidal bores, storm surges, tsunamis and flows over variable topography, are characterized by abrupt changes in the water surface. These changes produce vertical acceleration of the …
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Numerical Solution of the One-dimensional and Cylindrical Serre Equations for Rapidly Varying Free Surface Flows
Rapidly-varying free surface flows that arise, for example, from; rapid reservoir releases, dam-breaks, mud slides, tidal bores, storm surges, tsunamis and flows over variable topography, are characterized by abrupt changes in the water surface. These changes produce vertical acceleration of the …
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Numerical simulation of two and three-dimensional viscous free surface flows in partially-filled containers using a surface capturing approach
<p>A new surface capturing method is developed for numerically simulating viscous free surface flows in partially-filled containers. The method is based on the idea that the flow of two immiscible fluids (specifically, a liquid and a gas) within a closed container is governed by the equations of …
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