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Ten Thije Boonkkamp, J.H.M. (author), Rook, R. (author), Mattheij, R.M.M. (author)We have developed a numerical simulation code for laminar premixed flames, based on the isobaric model. The main numerical techniques employed are: the finite volume method in combination with an exponential flux approximation scheme for space discretisation, a pressure-correction (PC) method to decouple the computation of the velocity and...conference paper 2006
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Wendland, H. (author)This paper gives a survey on kernel-based scattered data interpolation methods in the context of static aeroelastic computations. We describe the general procedure, address problems and solutions for large-scale data sets, for flat data sets, and for rotational information. Finally, we demonstrate the versatility of the method by showing two...conference paper 2006
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Edwards, M.G. (author)Novel unstructured grid higher order convection schemes are presented. The schemes are coupled with locally conservative flux continuous control-volume distributed (CVD) finite-volume schemes for the porous medium general tensor pressure equation on structured and unstructured grids in 2-D and 3-D. The schemes are developed for multi-phase flow...conference paper 2006
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Eca, L. (author), Hoekstra, M. (author)This paper addresses the method of manufactured solutions for RANS solvers, i.e. in the context of the calculation of incompressible turbulent flows with eddy-viscosity turbulence models. The difficulties caused by damping and/or blending functions included in the turbulence models are discussed. The need to manufacture the turbulence quantities...conference paper 2006
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Deng, G.B. (author), Queutey, P. (author), Visonneau, M. (author)This paper is devoted to a code verification exercise for the unstructured finite-volume CFD solver ISIS-CFD. This exercise is limited to the verification of the 2D Navier-Stokes solver by prescribing a turbulence eddy-viscosity. The unstructured code is tested using three different types of grid, namely a Cartesian grid, an unstructured...conference paper 2006
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Kurganov, A. (author)We design a new well-balanced central-upwind scheme for compressible two-phase flows. The new scheme is an extension of the semi-discrete central-upwind scheme proposed in [1]. The novelty of the presented method is in a special discretization of nonconservative product terms, which are exactly balanced with the numerical fluxes when the method...conference paper 2006
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Duda, P. (author), Cebula, A. (author), Dwornicka, R. (author)High thermal stresses are created during the operation of power block devices such as boiler drums, outlet headers, steam valves, turbines and heat exchangers. Due to a cyclic character of such stresses, a phenomenon of low-cyclic fatigue occurs, which may lead to the formation of fractures. Manufacturers of power block devices frequently advice...conference paper 2006
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Coustols, E. (author), Jacquin, L. (author), Schrauf, G. (author)This document provides a synthesis of recent research studies that have been conducted in the last decade within several European projects from the 5th and 6th Framework Programmes. All these studies aimed at a better characterization of aircraft wake vortices and then at their subsequent control. In the latter case, the goal is to minimize the...conference paper 2006
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Kok, J.C. (author), Van Muijden, J. (author), Burgers, S.S. (author), Dol, H. (author), Spekreijse, S.P. (author)Scientific enhancement of the analysis of thermal comfort aspects in aircraft cabins is the subject of the current investigation. For this purpose, three important processes are identified that play a significant role in thermal comfort, viz. the human response to its thermal environment which is also known as thermoregulation, the actual...conference paper 2006
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Oldenziel, G. (author), Gerritsma, M.I. (author)This paper describes the use of the Least-Squares Spectral Element Method for non-linear hyperbolic equations. The one-dimensional inviscid Burgers equation is specifically subject of investigation. A second order backward difference method is used for time stepping. The behaviour of this formulation is examined by application to a testcase...conference paper 2006
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Tabor, G. (author), Tame, D. (author), Pierron, F. (author), Young, P.G. (author), Watkinson, A. (author), Thompson, J. (author)Biomedical flow problems tend to involve domains which are geometrically complex over a range of scales. Much effort has gone into developing tools for generating computational meshes automatically from medical scan data (MRI, CT), allowing the easy creation of patient-specific models of the flow domain, and hence the investigation of flow under...conference paper 2006
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Lamine, S. (author), Edwards, M.G. (author)Discontinuous-Galerkin schemes are presented for convective flow approximation in reservoir simulation. The methods are compared with slope limited MUSCL and TVD schemes. Standard reservoir simulation schemes employ single-point upstream weighting (first order upwind) for approximation of the convective fluxes when multiple phases or components...conference paper 2006
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Lesage, A.C. (author), Dervieux, A. (author), Allain, O. (author)In the case of incompressible flow, the level set method does not ensure mass conservation and it has to be enforced. The usual global mass conservation presents unacurracy in the case of separated phases of one fluid. In this paper, we propose an alternative local mass conservation based local volume fluxes. We apply our method to test cases...conference paper 2006
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Mizzi, S. (author), Emerson, D.R. (author), Stefanov, S.K. (author), Barber, R.W. (author), Reese, J.M. (author)highlight the fact that many micro-flows that have been considered are simple planar flows and typical classification systems are defined on such flows. We show that for complex flows, such as the driven cavity, non-equilibrium effects are more appreciable and their onset occurs at lower Knudsen numbers than expected.conference paper 2006
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Sawyers, D. (author)Abstract only.conference paper 2006
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Gauger, N.R. (author)Because detailed aerodynamic shape optimizations still suffer from high computational costs, efficient optimization strategies are required. Regarding the deterministic optimization methods, the adjoint approach is seen as a promising alternative to the classical finite difference approach. With the adjoint approach the sensitivities needed for...conference paper 2006
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Verstraete, T. (author), Alsalihi, Z. (author), Van den Braembussche, R.A. (author)A Conjugate Heat Transfer (CHT) analysis allows the calculation of the heat transfer and temperature of a body placed in a fluid. The CHT analysis takes into account both the conduction in the solid and the convection in the fluid. Present paper describes a CHT method that uses two separate solvers: one CFD solver dedicated to the flow...conference paper 2006
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- Gonzalez, L.F. (author), Periaux, J. (author), Whitney, E.J. (author), Srinivas, K. (author) conference paper 2006
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Nkonga, B. (author), Braconnier, B. (author), Claudel, J. (author)The present work is devoted to the numerical simulation of multiphase flows with two non-miscible compressible fluids. In this regime, interfaces can be tracked (Front tracking) or reconstructed (VOF, MOF). For theses approaches, interface topology changes and wave transmissions are difficult points. Diffuse interface methods are simple way to...conference paper 2006
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Naderan, H. (author), Manzari, M.T. (author), Hannani, S.K. (author)This article aims to demonstrate the advantages of using a high resolution central scheme in the field of multiphase flow in porous media. The black oil model, used in the petroleum reservoir engineering, is employed as it generally provides an acceptable model for most reservoirs and recovery processes. The governing equations are split into a...conference paper 2006