Efficient parallel algorithm for direct numerical simulation of turbulent flows



Publisher: National Aeronautics and Space Administration, Langley Research Center, Publisher: National Technical Information Service, distributor in Hampton, Va, [Springfield, Va

Written in English
Published: Downloads: 596
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Subjects:

  • Direct numerical simulation.,
  • Finite difference theory.,
  • Turbulent flow.,
  • Low Reynolds number.,
  • Navier-Stokes equation.,
  • Incompressible fluids.,
  • Viscous flow.
  • Edition Notes

    StatementStuti Moitra and Thomas B. Gatski.
    SeriesNASA technical paper -- 3686
    ContributionsGatski, T. B., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17135248M

  Direct numerical simulations of turbulent flows over riblet-mounted surfaces are performed to educe the mechanism of drag reduction by riblets. The computed drag on the riblet surfaces is in good agreement with the existing experimental by:   The direct numerical simulation of the flow over a sphere is performed. The computations are carried out in the sub-critical regime at Re = (based on the free-stream velocity and the sphere diameter). A parallel unstructured symmetry-preserving formulation is used for simulating the by: A new parallel implicit adaptive mesh refinement (AMR) algorithm is developed for the prediction of unsteady behaviour of laminar flames. The scheme is applied to the solution of the system of partial-differential equations governing time-dependent, two- and three-dimensional, compressible laminar flows for reactive thermally perfect gaseous by: 4. Theory and Numerical Modeling of Turbulent Gas-Particle Flows and Combustion is an excellent book for researchers, designers, instructors, and students interested in this field. Read more Read less click to .

A PARALLEL, FINITE-VOLUME ALGORITHM FOR LARGE-EDDY SIMULATION OF TURBULENT FLOWS Trong T. Bui * NASA Dryden Flight Research Center Edwards, California Abstract A parallel, finite-volume algorithm has been developed for large-eddy simulation (LES) of compressible turbulent flows. This algorithm includes piecewise linear least-square.   Numerical investigation of transitional and weak turbulent flow past a sphere - Volume - ANANIAS G. TOMBOULIDES, STEVEN A. ORSZAG Book chapters will be unavailable on Saturday 24th August between 8ampm by: Direct numerical simulation(DNS) of fundamental fluid flow simulation using 3-dimensional Navier-Stokes equations is a typical large scale computing which requires high performance computer with vector and parallel processing. In the present paper a turbulent boundary layer flow simulation with strong adverse pressure gradient on a flat. Direct numerical simulation of jet noise (B.J. Boersma). Migrating from a parallel single block to a parallel multiblock flow solver (T.P. BÖnisch, R. RÜhle). Parallel multidimensional residual distribution solver for turbulent flow simulations(D. Caraeni, M. Caraeni, L. Fuchs).

A Parallel Algorithm for the Two-Dimensional Time Fractional Diffusion Equation with Implicit Difference Method “An efficient parallel algorithm for the numerical solution of fractional differential M. Bernardini, and M. Botti, “GPU accelerated flow solver for direct numerical simulation of turbulent flows,” Journal of Cited by: 7. @article{osti_, title = {Direct Numerical Simulation of Interfacial Flows: Implicit Sharp-Interface Method (I-SIM)}, author = {Nourgaliev, Robert and Theofanous, Theo and Park, HyeongKae and Mousseau, Vincent and Knoll, Dana}, abstractNote = {In recent work (Nourgaliev, Liou, Theofanous, JCP in press) we demonstrated that numerical simulations of interfacial flows in the presence of. Abstract:A parallel direct-forcing fictitious domain method for the simulation of particulate flows is reported in this paper. The parallel computing strategies for the solution of flow fields and particularly the distributed Lagrange multiplier are presented, and the high efficiency of the parallel Cited by: Chen JH, Choudhary A, De Supinski B, Devries M, Hawkes ER, Klasky S et al. Terascale direct numerical simulations of turbulent combustion using S3D. Computational Science and Discovery. Jul 23;2(1). Cited by:

Efficient parallel algorithm for direct numerical simulation of turbulent flows Download PDF EPUB FB2

Databases of compressible turbulent flows are not as readily avail-able as those for incompressible turbulent flows. The effort described in this paper is the first parallel application of DNS for a compressible, turbulent, supersonic spatially evolving boundary-layer flow.

A turbulent flow is simulated at moderate Reynolds by: 2. National Aeronautics and Space Administration Langley Research Center • Hampton, Virginia NASA Technical Paper Efficient Parallel Algorithm for Direct Numerical Simulation of Turbulent Flows.

A distributed algorithm for a high-order-accurate finite-difference approach to the direct numerical simulation (DNS) of transition and turbulence in compressible flows is.

An adaptable parallel algorithm for the direct numerical simulation of incompressible turbulent flows using a Fourier spectral/hp element method and MPI virtual topologies. An adaptable parallel algorithm for the direct numerical simulation of incompressible turbulent flows using a Fourier spectral/.

by: 4. A parallel algorithm for the direct numerical simulation of turbulent channel flow Article (PDF Available) January with 67 Reads How we measure 'reads'.

This chapter discusses a code developed for the direct numerical simulation (DNS) of turbulent flows, which provides fairly good scalability up to about 36 processors even on a low cost PC cluster. The discretization of the Navier–Stokes equations is carried out with the fourth-order spectro-consistent scheme by Verstappen and Veldman.

DIRECT NUMERICAL SIMULATION OF TURBULENT FLOWS WITH PARALLEL ALGORITHMS FOR VARIOUS COMPUTING Parallel CFD, turbulent flows, MPI, OpenMP, OpenCL. Abstract. The purpose of the work is twofold. Firstly, it is devoted to the development of efficient parallel algorithms for large-scale simulations of turbulent flows on different.

However, their low bandwidth and high latency are serious obstacles that prevent their efficient use for many conventional parallel CFD (computational fluid dynamics) algorithms. A code for the direct numerical simulation (DNS) of turbulent flows, that provides fairly good scalability up to about 36 processors has been by: 1.

A Direct Schur-Fourier Decomposition for the Efficient Solution of High-Order Poisson Equations on Loosely Coupled Parallel Computers. Numerical Linear Algebra with Applications, (in press). Soria, F. Trias, C. Pdrez-Segarra, and A. Oliva. Direct Numerical Simulation of Turbulent Natural Convection Flows Using PC by: 2.

Direct Numerical Simulation of MHD Turbulent Flows with Hig h-Pr Heat Transfer VOL. 2, OCTOBER electrical conductivity, is the electric potential, Bi = (0, By,0) is the Magnetic flux density, and is the temperature.

Super script * denotes instantaneous value and ij, ijk (i,j,k = ) Efficient parallel algorithm for direct numerical simulation of turbulent flows book the. Numerical simulations of turbulent flows can be performed to capture (1) the temporal fluctuations and (2) the time-averaged features in the flow field.

For example, let us consider a simulated flow through an asymmetric by: 1. The direct numerical simulation of turbulence (DNS) has become a method of outmost importance for the investigation of turbulence physics, and its relevance is constantly growing due to the increasing popularity of high-performance-computing by: Efficient Parallel Algorithm for Direct Numerical Simulation of Turbulent Flows.

By Stuti Moitra And, Stuti Moitra, Stuti Moitra and Thomas B. Gatski and Thomas B. Gatski. Abstract. A distributed algorithm for a high-order-accurate finite-difference approach to the direct numerical simulation (DNS) of transition and turbulence in compressible.

Efficient Parallel Algorithm For Direct Numerical Simulation of Turbulent Flows. By Thomas B. Gatski and Stuti Moitra. Abstract. A distributed algorithm for a high-order-accurate finite-difference approach to the direct numerical simulation (DNS) of transition and turbulence in compressible flows Author: Thomas B.

Gatski and Stuti Moitra. The chapter investigates the efficiency of different parallel implementations and targets at direct numerical simulation (DNS) of high Reynolds number channel flow.

The chapter presents the investigation of different parallel implementations, including different parallel models and benchmark results, and reports DNS simulation results at high Reynolds number, Re*= Efficient Parallel Algorithm for Direct Numerical Simulation of Turbulent Flows.

By Stuti Moitra, Stuti Moitra and Thomas B. Gatski and Thomas B. Gatski. Abstract. A distributed algorithm for a high-order-accurate finite-difference approach to the direct numerical simulation (DNS) of transition and turbulence in compressible flows is described.

Cant, R.S. () Direct numerical simulations in combustion, ERCOFTAC Summer School on Turbulent Combustion and its Computation, Cambridge, Sept Google Scholar Emerson, D.R.

() Introduction to parallel computers, in High Performance Computing in Fluid Dynamics, ERCOFTAC Summer School, Delft University, The Netherlands June 24–28 Cited by: A Parallel Algorithm for the Direct Numerical Simulation of Turbulent Channel Flow Maurizio Quadrio1;, Paolo Luchini2, J.M.

Floryan3 1 Dept. Aerospace Engineering, Politecnico di Milano, Italy 2 Dept. Mechanical Engineering, University of Salerno, Italy 3 Dept. Mechanical and Materials Engineering, University of Western Ontario, Ontario, Canada Email: [email protected], [email protected] The purpose of the work is twofold.

Firstly, it is devoted to the development of efficient parallel algorithms for large-scale simulations of turbulent flows on different supercomputer architectures.

It reports experience with massively-parallel accelerators including graphics processing units of AMD and NVIDIA and many integrated core architecture accelerators Intel Xeon by: 2. The parallelization method is applied to a direct numerical simulation of turbulent channel flow over a square rib, based on the mean velocity above the obstacle and the step height.

The numerical results in terms of parallel efficiency indicate that the present implicit method scales reasonably well and is suitable for computing turbulent flows for complex geometries.

Get this from a library. Efficient parallel algorithm for direct numerical simulation of turbulent flows. [Stuti Moitra; Thomas B Gatski; Langley Research Center.].

Abstract. Direct Numerical Simulation of 3D reactive turbulent flow is a very useful tool for a better knowledge of turbulent phenomena, but accurate and costly numerical methods have to be used in order not to loose any of the physical by: An algorithm for the Direct Numerical Simulation (DNS) of the incompressible Navier–Stokes equations for simple geometries in Cartesian coordinates is de-scribed.

This algorithm presents excellent properties when used in large-scale or grid computing environ-ments: an underlying fast scalar implementation, low memory requirements, a limited.

Numerical Simulation of Turbulent Flows. Annual Review of Fluid Mechanics Data from experiments and direct simulations of turbulence have historically been used to calibrate simple engineering models such as those based on the Reynolds-averaged Navier–Stokes (RANS) equations.

(LBM), a parallel and efficient algorithm for simulating Cited by:   In this paper, an explicit low-storage simplified M — stage Runge-Kutta (SRK) scheme for high Reynolds-number incompressible flows is presented.

In the SRK scheme, the Poisson equation is solved only once in the final substage of each time step. By taking advantage of the SRK scheme and the advanced hybrid MPI+MPI model, we have developed an efficient parallel solver for buoyancy-driven Author: Yi-zhao Zhang, Shu-ning Xia, Yu-hong Dong, Bo-fu Wang, Quan Zhou.

The current work focuses on the development and application of an efficient algorithm for optimization of three-dimensional turbulent flows, simulated using Direct Numerical Simulation (DNS) or.

A direct numerical simulation of a fully developed turbulent flow and heat transfer in a square duct is studied based on high resolution finite difference scheme.

1 DIRECT NUMERICAL SIMULATION & LARGE EDDY SIMULATION (I) J. McDonough and T. Yang- Parallel Performance of a New Model for Wildland Fire Spread Predictions. Soria, F. Trias, C. Pérez-Segarra and A. Oliva - Direct Numerical Simulation of Turbulent Natural Convection Flows on PC Clusters Using a Fourth-Order Symmetry-Preserving Edition: 1.

Direct Numerical Simulation of turbulent flows is a computationally demanding problem that requires efficient parallel algorithms.

We investigate the applicability of the time-parallel Parareal algorithm to an instructional case study related to the simulation of the decay of homogeneous isotropic turbulence in three by: 3. The results from a direct numerical simulation (DNS) of turbulent, incompressible flow through a square duct, with an imposed temperature difference between the horizontal walls, are presented.

The vertical walls are assumed perfectly insulated, and the Reynolds number, based on the bulk velocity and the hydraulic diameter, is about Our results indicate that secondary motions Cited by: Parallel implementation of algorithm of numerical solution of Navier-Stokes equations for large eddy simulation (LES) of turbulence is presented in this research.

The Dynamic Smagorinsky model is applied for sub-grid simulation of turbulence. The numerical algorithm was worked out using a scheme of splitting on physical parameters. At the first stage it is supposed that carrying over movement Cited by: 2.numerical algorithm is described.

To validate the numerical method for turbulence simulation, LES of D fully developed turbulent flow in a square duct is DH performed for a Reynolds number of based on the average friction velocity and the hydraulic diameter of DNS the duct.

Direct numerical simulation (DNS) results are d_.