Showing papers in "Computers & Fluids in 2002"

TL;DR: In this paper, large-eddy simulations of spatially developing planar turbulent jets are performed using a compact finite-difference scheme of sixth-order and an advective upstream splitting method-based method of second-order accuracy.

TL;DR: In this paper, a new model for the study of incompressible mixture flows is presented, which is a generalization of a model previously studied in the literature, in which the densities and viscosities of the two phases are allowed to be different.

TL;DR: In this paper, the authors analyzed the data obtained from direct numerical simulation with a micro-rheological model for the polymers and analyzed the correlations between velocity fluctuations and viscoelastic responses.

TL;DR: In this article, an efficient projection method was proposed to solve the Navier-Stokes equations in primitive variables formulation using spectral approximations, based on a modification of the algorithm proposed by Goda [J. Comp. Phys. 30 (1979) 76].

TL;DR: In this paper, the authors consider a drift flux model describing one dimensional isothermal gas-liquid flow in a long pipeline and present a high-resolution hybrid primitive-conservative upwind scheme, which utilizes a simple non-conservative MUSCL scheme in shock free flow regions and highresolution conservative upwind schemes in shocked flow regions.

TL;DR: It is shown that computational fluid dynamics simulations provide reliable results and yields a detailed and accurate picture of the complex flow phenomena observed in stirred-tank reactors.

TL;DR: In this article, a linear reduced-order aerodynamic model is developed for aeroelastic analysis of turbomachines, where the basis vectors are constructed using a block Arnoldi method and the spatial periodicity of the problem is exploited in the frequency domain to obtain these vectors efficiently.

TL;DR: In this article, the two-dimensional incompressible Navier-Stokes equations in primitive variable form are solved by using the generalized differential quadrature method with SIMPLE strategy.

TL;DR: In this article, the hybrid flux approach was used to compute the shock/homogeneous turbulence interaction with respect to DNS. But, the results showed that it is efficient to compute such interaction only if the mesh is fine enough in the shock vicinity to capture shock corrugation.

TL;DR: In this article, a novel B-spline collocation method for the solution of the incompressible Navier-Stokes equations is presented, where the projection step is considered as a Div-Grad problem, so that no pressure boundary conditions need to be prescribed.

TL;DR: In this paper, dissipative compact schemes for multidimensional hyperbolic problems are constructed for the compressible Euler equations without and with shock waves, and numerical dissipation is also residual based, which provides simplicity and robustness.

TL;DR: In this article, a thorough investigation of three-dimensional flow in a cubical cavity, subject to a constant velocity lid on its roof, is presented, where the weighting functions are properly chosen so that false diffusion errors can be largely suppressed by the equipped streamline operator.

TL;DR: In this article, the authors present the results of the numerical analysis of a gallium melting experiment and confirm that the absence of multicellular structures in the flow of the melted gallium is due to poor resolution, that is either to a low order numerical scheme or to a coarse space grid of discretization.

TL;DR: In this article, the authors considered the problem of deformation and flow in an isothermal liquid bridge maintained between two circular rods, when one rod is subject to axial monochromatic vibrations.

TL;DR: In this paper, a viscous compressible flow is simulated with high-order accurate discontinuous Galerkin methods on bidimensional unstructured meshes and a limiting procedure is developed to suppress oscillations near large gradients.

TL;DR: In this article, a fixed grid method based on an enthalpy-porosity formulation for liquid/solid phase transition is extended to compute the time-dependent solutal convection in the melt during directional solidification of alloys.

TL;DR: In this article, two-dimensional numerical simulations of the Benard-von Karman hydrodynamic instability behind trapezoidal bluff bodies have been studied using the spline method of fractional steps.

TL;DR: In this paper, the authors show how to improve the numerical solution of singular problems involving boundary layers by taking into account information on the structure of the boundary layer, which can result in significant simplification and increase of accuracy.

TL;DR: In this paper, a simulation of linearly sheared flow past a circular cylinder has been performed for a shear parameter β of 0.02 and a mean Reynolds number of 131.5.

TL;DR: In this article, a two-dimensional boundary-layer flow over a bump has been studied computationally by solving the incompressible Navier-Stokes equations using a mapping transforming the physical coordinate system into a Cartesian one.

TL;DR: In this article, the algebraic extra-stress model (AESM) derived from the differential constitutive equation for an Oldroyd-B fluid is extended to a Phan-Thien-Tanner fluid.

TL;DR: A strategy of self-adaptive mesh refinement is developed to perform a multi-resolution approach for combustion problems to track and resolve the small length scales arising in the thickness of a flame front based on a series of nested grids.

TL;DR: A large number of direct numerical and large eddy simulations of turbulent stratified flows that are mainly of interest in environmental fluid mechanics and geophysics that have been made over that last ten years are described in this paper.

TL;DR: In this paper, the analysis of flow in the entrance zone of a sharp-edged channel has been carried out and the method used combines asymptotic solutions in the far upstream and downstream zones with a numerical solution in-between.

TL;DR: In this paper, a viscous-inviscid interaction triple-deck structure is developed to describe the thermomechanical interaction of an air boundary layer with ice sheets and liquid films.

TL;DR: In this paper, two numerical procedures, one based on artificial compressibility and the other pressure projection method, are investigated for obtaining time-accurate solutions of the incompressible Navier-Stokes equations.

TL;DR: A hybrid Eulerian-Lagrangian solver for unsteady shear flow induced by vortex ring/wall interactions is presented and discussed in this paper, where the main features of the oblique impingement of a vortex ring on a wall are captured quite well and comparison is made with the experimental results.

TL;DR: In this paper, the dual time stepping approach is extended to solve coupled equations of incompressible fluid flows and rigid body motion in fluid-structure interaction problems, and the flow solver is the general CDF code EOLE, developed since 1990.

TL;DR: In this article, a numerical method for the simulation of two-phase multi-dimensional transient flows is presented, based on a finite volume explicit scheme, and the recent density perturbation method.