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Trias, F.X. (author), Soria, M. (author), Oliva, A. (author), Verstappen, R.W.C.P. (author)Since direct numerical simulations (DNS) of natural convection in a differentially heated cavity can not be performed at high Ra-numbers, a dynamically less complex mathematical formulation is sought. In the quest for such a formulation, we consider regularizations (smooth approximations) of the nonlinearity. The regularization method basically...conference paper 2006
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Arioli, M. (author), Loghin, D. (author)Abstract only.conference paper 2006
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Titarev, V.A. (author)Model kinetic equations are often used to describe rarefied gas flows in the broad range of flow regimes. Accurate model kinetic equations were proposed by Shakhov [1] for monatomic gases and by Rykov [2] for diatomic gases. The main advantage of these model equations over other models reported in the literature is that the model collision...conference paper 2006
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Blanquet, E. (author), Chaussende, D. (author), Nishizawa, S. (author), Pons, M. (author)Over the last twenty years, processes which lead to materials synthesis from a gaseous phase constitute an important technology in many applications fields such as microelectronics or protective coating industry. Due to the complexity of the involved phenomena, computational modeling had been required to improve technological processes and help...conference paper 2006
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Augarde, C.E. (author), Ramage, A. (author), Staudacher, J. (author)Abstract only.conference paper 2006
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Moura Neto, F.D. (author), Goncalves, F. (author)This work presents some results concerning the interface evolution of two imiscible fluids flowing inside an isotropic porous medium in a typical viscous instability problem, known as the Saffman-Taylor instability. This involves the application of an iterative parallelizable graph based algorithm coupled with a semi-Lagrangian level set...conference paper 2006
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SenthilKumar, S. (author), Delauré, Y.M.C. (author)A Volume of Fluid (VOF)-Youngs model for the solution of an incompressible immiscible two-phase flows is presented. The solver computes the flow field by solving the family of Navier Stokes equations using SIMPLE algorithm and tracks the position of interface between two fluids with different fluid properties by Piecewise Linear Interface...conference paper 2006
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Lüddeke, H. (author), Calvo, J.B. (author), Filimon, A. (author)Substantial requirements for future rocket technologies are the cost-efficient access to orbit as well as the increase in the system reliability. Concerning these requirements the engine is one of the most important parts and a deeper insight into the unsteady phenomena during the start phase of modern launchers is essential. Especially unsteady...conference paper 2006
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Turkel, E. (author), Erlangga, Y.A. (author)We consider acoustic scattering about a general body. This is described by the Helmholtz equation exterior to the body. In order to truncate the infinite domain we use the BGT absorbing boundary condition. The resultant problem in a finite domain is solved by a finite element procedure. This yields a large sparse system of linear equations which...conference paper 2006
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Schroeder, G. (author), Schlünzen, K.H. (author)In this work numerical dispersion relations for atmospheric gravity waves are experimentally analyzed using the anelastic mesoscale model METRAS. The dependency of the group velocity on grid size and advection scheme (central scheme (CDF) and methods based on the essentially non-oscillatory (ENO) method) is presented showing a retardation of the...conference paper 2006
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Vigneron, D. (author), Deliége, G. (author), Essers, J.A. (author)This paper presents a density-based finite volumes method for solving the unsteady Navier-Stokes equations on 3D unstructured grids. The second order Crank-Nicolson scheme is applied to perform the time integration. At each time step, the system of non linear equations is solved by means of a fully implicit dual time stepping method. An...conference paper 2006
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Ayub Akhtar, M. (author), Sohaib, M. (author), Rafique, M. (author)A time dependent Computational Fluid Dynamics analysis of gas jets impinging onto liquid pools has been conducted. The aim of the study is to obtain a better understanding of highly complex, and industrially relevant flows in jetting system. Three different multiphase models, i.e., The Eulerian model, the volume of fluid model and the mixture...conference paper 2006
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Schmidt, S.J. (author), Sezal, I.H. (author), Schnerr, G.H. (author)The present paper focuses on a numerical approach based on the Riemann problem to simulate liquid flows with phase changes. Thereby, the flow properties include velocities from O(1) m/s to O(100) m/s and pressures from p approx 0 bar to O(1000) bar. The thermal and caloric behavior of liquid and vapor will be described by suitable equations of...conference paper 2006
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Kwakkel, M. (author), Gerritsma, M.I. (author)In this work a new approach to time dependent problems in combination with the Least-Squares Spectral Element Method (LSQSEM) will be discussed. Various time-stepping formulations will be presented. These time-stepping formulations will be compared to the full space-time formulation. It will be shown that time-stepping formulations give accurate...conference paper 2006
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Bassi, F. (author), Crivellini, A. (author), Di Pietro, D.A. (author), Rebay, S. (author)This paper deals with the evaluation and validation of a recently developed parallel discontinuous Galerkin code for the numerical solution of the RANS and k-omega turbulence model equations. The main features of the code can be summarized as follows: a) high-order spatial accuracy on hybrid grids, b) fully coupled, implicit time discretization,...conference paper 2006
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Sousa, F.S. (author), Portela, L.M. (author), Mudde, R.F. (author), Mangiavacchi, N. (author)We present a method for fully-resolved simulations of bubbly flows using a front-tracking/front-capturing technique. The method is a modification of a marker-and-cell method developed previously for free-surface flows. The basic approach is somehow similar to the front-tracking method of Tryggvason: the continuity and Navier-Stokes equations are...conference paper 2006
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Wassenberg, F. (author), Goetgeluk, F. (author)Workshop 2. Session 2.3: Mapping home Abstract Housing satisfaction is more and more being determined by the quality of the surrounding area, and its appreciation by the inhabitants. Housing is more than the care for just a roof for everybody: the residential environment matters. Otherwise, there are processes of individualization, globalization...conference paper 2005
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Claessens, F. (author)Workshop 2. Session 2.1: Planning and everyday lifeconference paper 2005
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De Visscher, S. (author), Bouverne-De Bie, M. (author)Workshop 3. Session 3.2: Caring and playing Introduction: Many studies and policy practices relating to the neighbourhood of children1 construe the neighbourhood mainly as a play environment. As a result, the neighbourhood of children is predominantly if not exclusively assessed on the opportunities it offers to children for playing and...conference paper 2005
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Berk, M.G. (author)Workshop 2. Session 2.3: Mapping homeconference paper 2005