Showing papers in "Computers & Fluids in 2016"

TL;DR: In this article, the authors summarize the motivations behind utilizing the smoothed particle hydrodynamics (SPH) method in an industrial context, as well as deriving general conclusions regarding its assets and limitations and stressing the remaining challenges in order to make it an hand-on computational tool.

TL;DR: The coupling tool preCICE is presented which offers the complete coupling functionality required for a fast development of a multi-physics environment using existing, possibly black-box solvers and numerical examples show the high flexibility, the correctness, and the high performance and parallel scalability of coupled simulations withpreCICE as the coupling unit.

TL;DR: In this paper, a new three-dimensional numerical wave tank is developed for the calculation of wave propagation and wave hydrodynamics by solving the incompressible Navier-Stokes equations.

TL;DR: In this paper, a finite volume method using OpenFOAM is used to numerically model laser generated cavitation bubbles with the Tait equation for the liquid (water) and compare the results with the Gilmore model and experiments.

TL;DR: A computational fluid–structure interaction (FSI) framework for the simulations of the interaction between free-surface flow and floating structures, such as offshore wind turbines, is proposed, which has good efficiency, accuracy and robustness characteristics.

TL;DR: The proposed tetrahedral finite cell method for the simulation of incompressible flow around geometrically complex objects and the results show that the faithful representation of the geometry in intersected elements is critical for accurate flow analysis.

TL;DR: It has been shown that the use of a hybrid RANS-LES model offers an advantage over RANS models in terms of the force coefficients, and general flow field for both the Ahmed car body and the DrivAer model.

TL;DR: Conservation properties of this method are shown to be excellent, while geometrical accuracy remains satisfactory even for the most complex flows.

TL;DR: The ST-VMS method is a stabilized formulation that also serves as a turbulence model and can deal effectively with the complex, multiscale flow behavior and the first two key steps in fluid–structure interaction analysis are presented.

TL;DR: In this paper, a large-eddy simulation (LES) using the fine grids in order to represent details of near-cylinder flows is assessed from the engineering viewpoint, compared with previous studies, where numerical schemes for convective terms, meshing strategies, and spanwise resolution and length are emphasized.

TL;DR: This work presents, for the first time, full-scale FSI simulation of two compliant hydrofoils in a tandem configuration, and the underlying computational challenges are addressed by means of core FSI methods, as well as special FSI techniques developed for this problem class.

TL;DR: The present article describes the numerical components and methods implemented in this code, together with a detailed verification and validation phase, and finishes with two examples of full-scale simulations of reacting flows.

TL;DR: In this paper, the authors extended the discrete unified gas kinetic scheme (DUGKS) to unstructured meshes, with the implementation of computational fluid dynamics techniques to the DUGKS, and several test cases, i.e., cavity flow ranging from continuum to free molecular regimes, high speed flows past multiple cylinders in slip and transitional regimes, and an impulsive start problem are performed.

TL;DR: In this article, the authors derived a flow model for numerical simulation of multi-phase flows with phase transition, where each phase is compressible and evolves in its own subvolume with phases sharing common pressure, velocity and temperature, leading to non-trivial thermodynamic relations for the mixture.

TL;DR: In this paper, the authors examined the behavior of several widely used momentum exchange (ME) methods coupled with different refilling algorithms for particle settling and neutrally buoyant particle migration.

TL;DR: A preconditioned Navier–Stokes (NS) method is developed for multiphase flow with application to the water entry problem of moving bodies, employing a dual time-preconditioned technique with multiblock and parallel computing to improve the computational productivity.

TL;DR: In this article, the momentum balance equation is used to calculate the mean velocity profile by considering the Reynolds stress tensor provided by DNS, which can be used to extract a more accurate turbulent viscosity for turbulence modeling purposes.

TL;DR: The Serendipity Virtual Element Spaces (SVEMs) as mentioned in this paper are a variant of Nodal Virtual Element spaces that mimics the SFER methods and allow to reduce (often in a significant way) the number of internal degrees of freedom.

TL;DR: The “ST-SI-TC” method is introduced here that enables accurate flow analysis when the authors have a spinning solid surface that is in contact with a solid surface and deals with the TC while maintaining high-resolution boundary layer representation near solid surfaces.

TL;DR: In this paper, large-eddy simulations of flow over a pitching airfoil are conducted to study the effect of freestream turbulence on the aerodynamic characteristics of wind turbines.

TL;DR: In this article, particle-resolved simulations of a turbulent channel flow with finite-size solid particles are presented, where the particle diameter is 5% of the channel width and the average volume fraction is 7.09%.

TL;DR: In this paper, the authors used a three-dimensional efficient mesh with a refined mesh in the viscous sublayer, corresponding to the best compromise between the maximum accuracy and the minimum computational effort.

TL;DR: In this article, the dominant dissipation term (of the pressure flux) in each flux function is locally controlled (0, 1) for high-resolution simulations of SLAU2 and AUSM+up.

TL;DR: In this article, the main components of the method used in the analysis are the Streamline-Upwind/Petrov-Galerkin (SUPG) and Pressure-Stabilizing /Petrov and Galerkin(PSPG) stabilizations, a finite element particle-cloud tracking method, and an erosion model.

TL;DR: In this article, the authors presented a partitioned iterative and a dynamic subgrid-scale (SGS) scheme to simulate flow-induced vibration of freely vibrating structures in a turbulent flow.

TL;DR: The ability of the present method to reproduce the whole atomization process, from large scale instabilities to small droplet dynamics, and allow a preliminary statistical spray analysis is highlighted.

TL;DR: A complex DES model based on the v 2 ¯ –f approach is implemented in order to take advantage of its good performance in the near-wall as well as in the LES region and to validate the DES models available in the OpenFOAM official release.

TL;DR: In this paper, the authors investigated the natural convection heat transfer of air for turbulent flow in cavity using the lattice Boltzmann method (LBM) and found that the results obtained from the present LBM simulations are in good agreement with the Kolmogorovlaw and Bolgiano-law.

TL;DR: In this paper, the authors compare various no-slip boundary schemes and collision operators to assess their efficiency and accuracy for determining the correlations for drag force and permeability in porous media for a wide range of Reynolds numbers and solid volume fractions.

TL;DR: A high order discretisation scheme, namely the surface compression scheme, and an interface reconstruction scheme based on a piecewise linear interface calculation (PLIC) are assessed: accuracy, convergence rate and computational cost are compared with results from literature.