Topic
Volume of fluid method
About: Volume of fluid method is a research topic. Over the lifetime, 5338 publications have been published within this topic receiving 116760 citations.
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TL;DR: In this article, a numerical study was performed to investigate droplet actuation under electrowetting forces, where a volume of fluid, VOF, technique was applied to track the 3D interface.
55 citations
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TL;DR: This paper presents analytical relations connecting linear interfaces and volume fractions in triangular and tetrahedral grids and cites some of the most efficient formulas for polygon area and polyhedron volume computations for computing the volume of fluid in an arbitrary polygonal or polyhedral fluid element.
55 citations
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TL;DR: In this paper, a new numerical method that couples the incompressible Navier-Stokes equations with the global mass correction level set method for simulating fluid problems with free surfaces and interfaces is presented.
Abstract: A new numerical method that couples the incompressible Navier-Stokes equations with the global mass correction level set method for simulating fluid problems with free surfaces and interfaces is presented in this paper. The finite volume method is used to discretize NavierStokes equations with the two step projection method on a staggered grid. The free surface flow problem is solved on a fixed grid in which the free surface is captured by the zero level set. Mass conservation is improved significantly by applying a global mass correction scheme, in a novel combination with third order essentially non-oscillatory schemes and a five stage Runge-Kutta method, to advection and re-distancing of the level set function. The coupled solver is applied to simulate interface change and flow field in four benchmark test cases: (1) shear flow; (2) dam break; (3) travelling and reflection of solitary wave and (4) solitary wave over a submerged object. The computational results are in excellent agreement with theoretical predictions, experimental data and previous numerical simulations using a RANS-VOF method. The simulations reveal some interesting free surface phenomena such as the free surface vortices, air entrapment and wave deformation over a submerged object.
54 citations
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TL;DR: In this paper, the authors present results of a multiphase computational fluid dynamics code using a coupled level-set/volume-of-fluid method to simulate liquid atomization.
Abstract: This paper presents results of a multiphase computational fluid dynamics code using a coupled level-set/volume-of-fluid method to simulate liquid atomization. This interface-capturing approach combines the mass conservation properties of the volume-of-fluid method with the accurate surface reconstruction properties of the level-set method, and it includes surface tension as a volume force calculated with second-order accuracy. Developed by one of the authors, the multiphase code builds upon the combined level-set/volume-of-fluid methodology to enable bubbly flow, liquid breakup, and phase-change simulations. The extension presented in this paper couples a Lagrangian dispersed phase model for postbreakup tracking of droplets with block-structured adaptive mesh refinement on the Eulerian grid. Under an appropriate set of criteria, the transfer of droplets representation from the Eulerian to the Lagrangian discretization enables the simulation of sprays on larger domains and for longer physical times without...
54 citations
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TL;DR: In this article, the formation of a hydraulic jump in a stilling basin downstream of a spillway with Froude number Fr = 6 and developed upstream flow was investigated using a physical and a numerical model.
Abstract: The formation of a hydraulic jump in a stilling basin downstream of a spillway with Froude number Fr = 6 and developed upstream flow was investigated using a physical and a numerical model. The numerical model is based on the 2D Reynolds-averaged Navier–Stokes equations, where the free surface is represented using a refined Volume-Of-Fluid (VOF) algorithm, the internal obstacles are described by means of the Fractional Area–Volume Obstacle Representation (FAVOR) method and the turbulence dynamics are represented using a specially developed RNG k–e closure model. Additional features of the code that are vital for its practical application include an automatic time step control, high–order schemes for advection and a variety of boundary conditions for the dependent variables on the free surface and adjacent to the internal obstacles.With this model, the hydraulic jump characteristics were analysed in two stages. First the turbulence model was not used, to describe the initial stages of jump formation and ob...
54 citations