Showing papers in "Computers & Fluids in 2005"

TL;DR: This work considers the numerical solution of the compressible Reynolds-averaged Navier–Stokes and k–ω turbulence model equations by means of DG space discretization and implicit time integration, and presents the results obtained in the computation of the turbulent flow over a flat plate and the turbulent unsteady wake developing behind a turbine blade.

TL;DR: Both historical and most recent works focused on improving the computational accuracy of the level set method are discussed, focusing in part on applications related to incompressible flow due to both of its popularity and stringent accuracy requirements.

TL;DR: The HWENO finite volume methodology is extended to solve two dimensional non-linear hyperbolic conservation law systems and Numerical experiments for two dimensional Burgers’ equation and Euler equations of compressible gas dynamics are presented to show the effectiveness of these methods.

TL;DR: A chronology and issues related to the acquisition, development, and use of Computational Fluid Dynamics (CFD) at Boeing Commercial Airplanes in Seattle can be found in this paper.

TL;DR: In this article, a direct numerical simulation of flow separation and transition around a NACA 0012 airfoil with an attack angle of 4° and Reynolds number of 10 5 based on free-stream velocity and chord length is presented.

TL;DR: In this paper, the Navier-Stokes equations are discretized with a high-resolution Fourier pseudo-spectral discretization with adaptive time-stepping.

TL;DR: In this paper, a finite element technique is used to simulate 3D fluid-structure interaction problems using Taylor-Galerkin (TGS) and linear tetrahedra elements.

TL;DR: A Fourier type analysis on both Petrov–Galerkin methods when solving linear one-dimensional conservation laws is performed and a comparison between the two methods is given in terms of accuracy, stability, and convergence.

TL;DR: A projection finite volume scheme is proposed based on a Riemann solver with a simpler pressure law and an entropy maximization procedure that enables us to recover the original complex pressure law.

TL;DR: In this article, a finite difference method to solve the incompressible Navier-Stokes equations in cylindrical geometries is presented based upon the use of mimetic discrete first-order operators (divergence, gradient, curl), i.e. operators which satisfy in a discrete sense most of the usual properties of vector analysis in the continuum case.

TL;DR: Some of the successes made possible by advances in computational technologies during the same period are reviewed, and some of the current challenges faced in computing incompressible flows are discussed.

TL;DR: In this paper, the formation and evolution of Gortler type vortices over a laminar compression ramp under an hypersonic flow is presented. But the authors do not consider the effect of the velocity perturbation on the flat plate.

TL;DR: In this paper, large-eddy simulations of the turbulent flow in a swirl tube with a tangential inlet have been performed, and the effects of spatial resolution and choices in subgrid-scale modeling were explicitly investigated with the experimental data set as the testing ground.

TL;DR: This paper presents the so-called local discontinuous Galerkin method for linearized incompressible fluid flow, a stable, high-order accurate and locally conservative finite element method whose approximate solution is discontinuous across inter-element boundaries.

TL;DR: Numerical results suggest that the new improved WENO-TVD schemes are superior to the original schemes used with first-order monotone fluxes, especially so for long time evolution problems containing both smooth and non-smooth features.

TL;DR: In this article, numerical simulations of flame ball-vortex interactions using adaptive multiresolution methods are presented, where the grid in physical space is adapted dynamically to track the evolution of the solution in scale and space.

TL;DR: In this article, the effects of flow velocity and particle size were investigated for one contraction geometry considering water flow in a steel pipe and the results showed the strong dependence of erosion on both particle size and flow velocity but with little dependence on the direction of flow.

TL;DR: In this article, the authors investigated the stability of turbulent natural convection between inclined isothermal plates and found that the channel overall average Nusselt number is reduced, the rate of reduction increases as the inclination angle is increased and that the overall average number at different inclination angles can be presented by a single correlation if plotted versus the product of the modified Rayleigh number and (Cos θ) 0.5.

TL;DR: In this paper, a dissipative compact scheme was developed within a dual time stepping framework for the computation of unsteady compressible flows, which relies on the vanishing, at steady state with respect to the dual time, of a residual that includes the physical time-derivative.

TL;DR: Delville et al. as mentioned in this paper proposed a new and efficient numerical algorithm to deal with the divergence free constraint on both the velocity and the vorticity field of a 3D mixing layer spatially developing downstream of a flat plate.

TL;DR: The investigation demonstrates that extremely high resolution is needed to ensure that numerical issues do not obscure physical phenomena and turbulence-model capabilities and the results of precursor calculations for the wake can be seriously flawed because of inherent limitations in the RANS approach.

TL;DR: In this paper, a 3D numerical model is proposed to simulate complex unsteady cavitating flows, and the final objective is to predict instabilities due to cavitation in turbopump inducers.

TL;DR: In this article, the relationship between the design parameters of the geometrical configuration and fan performance is discussed in a theoretical perspective, analyzing the features of the corresponding flow fields, and the numerical results are validated with experimental data obtained from tests on performance and from local measurements of the flow field.

TL;DR: In this paper, a large eddy simulation of fully developed turbulent open channel flow with heat transfer is performed, where the three-dimensional filtered Navier-Stokes and energy equations are numerically solved using a fractional-step method.

TL;DR: In this paper, the effect of the volume of the liquid melt on the instability of Marangoni flow is investigated by direct three-dimensional and time-dependent simulation of the problem and parallel computations.

TL;DR: In this article, a series of nearly 90 CFD test cases performed as a contribution to the second Drag Prediction Workshop, held in Orlando, Florida in June 2003, is described and analyzed.

TL;DR: In this paper, B-spline collocation has been used to solve the Navier-Stokes and continuity equations for laminar flow and convergence studies show that the ad hoc Boundary Residual method is convergent toward an exact (manufactured) solution for the 2D, steady, incompressible Navier Stokes and continuoustime equations.

TL;DR: Numerical tests carried out in 1D and on 2D unstructured meshes prove that the convergence rate of the hybrid method is equal to the one of the highest degree polynomial basis, but with a significant CPU cost saving.

TL;DR: In this paper, a model independent approach was attempted for wake suppression using feedback control, which was then augmented by switching over to a model-dependent controller, which is far more effective in the suppression of the wake at higher Reynolds numbers.

TL;DR: In this article, a linear model equation for modeling near-wall turbulent flows is introduced, which simulates major mathematical peculiarities of the low-Reynolds-number model including a near wall sub-layer and transition region.