A parallel, finite-volume algorithm for large-eddy simulation of turbulent flows

Bui, Trong T.

doi:10.1016/s0045-7930(99)00040-7

Cited by 50 publications

(13 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resulting equations thus govern the dynamics of large eddies. Filtering the incompressible Navier-Stokes equations, one obtains [14]:…”

Section: Governing Equationsmentioning

confidence: 99%

Radial force within two-stage axial-flow blood pump based on LES

Sang¹,

Zhou²,

Liu³

et al. 2017

J. vibroeng.

View full text Add to dashboard Cite

Radial force in implantable two-stage axial flow blood pump (Artificial Heart) is a major factor affecting the operation stability. In order to investigate the transient operation characteristics of two-stage blood pumps, three-dimensional, unsteady numerical simulations were conducted by using the large eddy simulation (LES) model, PISO algorithm based on the sliding mesh technique in Fluent. The performance of the pump was obtained and compared with the experimental results. Besides, the radial force at various monitoring points were acquired; next, they were analyzed in time and frequency domains, respectively. It was demonstrated that the radial force at all the monitoring points changes periodically with time, its number of periods is identical to the number of blades but less affected by the number of guide vane blades, its frequency is close to the blade passing frequency. The frequency of radial force within the impeller increases gradually towards the impeller outlet and approaches the maximum value there, while the variation tendency of the frequency is opposite within the guide vane. The mostly dramatic radial force occurs at the impeller outlet, the main frequency at various monitoring points is almost equal to the impeller passing frequency. The amplitude of radial force coefficient at the monitoring points in the second stage impeller is higher than the first stage impeller. Additionally, the main frequency of radial force in the first stage impeller is different from the second stage guide vane.

show abstract

“…The resulting equations thus govern the dynamics of large eddies. Filtering the incompressible Navier-Stokes equations, one obtains [14]:…”

Section: Governing Equationsmentioning

confidence: 99%

Radial force within two-stage axial-flow blood pump based on LES

Sang¹,

Zhou²,

Liu³

et al. 2017

J. vibroeng.

View full text Add to dashboard Cite

show abstract

“…The Van leer FVS technique reconstructs the fluxes by determining an approximate solution to the underlying set of Riemann problems, which still describes the importance of nonlinear behavior of interacting waves. The inviscid cell reconstruction convention was adopted according to this [Bui (1999)]. For that, discontinuous states are assumed to exist on either sides of the cell interface.…”

Section: Inviscid Fluxesmentioning

confidence: 99%

Validation of 2d Multi-Block High-Speed Compressible Turbulent Flow Solver

Khawar

A.-ul-Haque²,

Chaudhry³

2007

Int. J. Comput. Methods

View full text Add to dashboard Cite

A 2D multi-block high-speed compressible turbulent flow solver CFD2D based on the Jones and Launders two-equation k-ε turbulence model is developed. Method of solution employed is Finite Volume Method. Its basic algorithm is based on the approximate Riemann solver with the three-step Runge-Kutta time integration. Its additional feature includes Wilcox model for compressibility correction of k-ε turbulence model, Girmaji algebraic Reynolds stress (non-linear stress) model and linear stress model for evaluation of turbulent stresses. For validation purpose, code is applied to a 2D diamond aerofoil and a wedge ramp attached to a flat plate. CFD-predicted results are compared to the experimental results for shock wave and shock wave boundary layer interaction on the trailing edge of the fin. Contour plots are also compared to the Schlieren photographs. Flow simulation shows ability of the code to capture the physics of the flow both qualitatively and quantitatively.

show abstract

“…The advantages of a theoretical foundation are many, but a key advantage is the ability to discriminate among methods, processes and tools so that we can determine that one method is better than another, referenced to theory. Evaluation of tools and methods with respect to theory is common in other engineering disciplines, as when a computational fluid dynamics model is critiqued because of its representation of eddies (Bui, 1999). Our investigation reported in this paper is an example of assessing a design method with respect to established theories from political science and optimization.…”

Section: Introductionmentioning

confidence: 99%

Pugh Controlled Convergence and Social Choice Theory

Nicholson¹,

Collopy²

2019

Proc. Int. Conf. Eng. Des.

View full text Add to dashboard Cite

The Pugh Method of Controlled Convergence is evaluated based on social choice theory, both from an axiomatic basis, and by examining all possible cases of attribute ranks for a range of numbers of alternatives and numbers of attributes. The evaluation shows that, for a typical Pugh application, concept selection varies with the arbitrary choice of datum or is simply incorrect in about one-third of the cases. While there are merits to the iteration steps and creation of new alternatives within the Pugh method, a simpler and more expressive concept ranking procedure can give far superior results.

show abstract

A parallel, finite-volume algorithm for large-eddy simulation of turbulent flows

Cited by 50 publications

References 20 publications

Radial force within two-stage axial-flow blood pump based on LES

Radial force within two-stage axial-flow blood pump based on LES

Validation of 2d Multi-Block High-Speed Compressible Turbulent Flow Solver

Pugh Controlled Convergence and Social Choice Theory

Contact Info

Product

Resources

About