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Achieving high sustained performance in an unstructured mesh CFD application

W. K. Anderson, W. D. Gropp, D. K. Kaushik, D. E. Keyes, B. F. Smith
1999 Proceedings of the 1999 ACM/IEEE conference on Supercomputing (CDROM) - Supercomputing '99  
This paper highlights a three-year project by an interdisciplinary team on a legacy F77 computational fluid dynamics code, with the aim of demonstrating that implicit unstructured grid simulations can  ...  This snapshot of ongoing work shows a performance of 15 microseconds per degree of freedom to steady-state convergence of Euler flow on a mesh with 2.8 million vertices using 3072 dualprocessor nodes of  ...  Achieving high sustained performance, in terms of solutions per second, involves three aspects. The first is a scalable algorithm in the sense of convergence rate.  ... 
doi:10.1145/331532.331600 dblp:conf/sc/AndersonGKKS99 fatcat:qfmfuhhemjb3nd3ybulnj6nkyu

Exploring system architectures for next-generation CFD simulations in the postpeta-scale era

Kazuhiko KOMATSU, Ryusuke EGAWA, Hiroyuki TAKIZAWA, Takashi SOGA, Akihiro MUSA, Hiroaki KOBAYASHI
2014 Journal of Fluid Science and Technology  
Therefore, a supercomputing system that consists of a small number of high-performance nodes is essential to achieve high sustained performance of the next-generation CFD in the upcoming postpeta-scale  ...  A memory subsystem that achieves a higher sustained memory bandwidth is required.  ...  (JST CREST) "An Evolutionary Approach to Construction of a Software Development Environment for Massively-Parallel Heterogeneous Systems".  ... 
doi:10.1299/jfst.2014jfst0073 fatcat:rc7mlptnmjhytofrgixhw76cqm

Auto-vectorizing a large-scale production unstructured-mesh CFD application

G. R. Mudalige, I. Z. Reguly, M. B. Giles
2016 Proceedings of the 3rd Workshop on Programming Models for SIMD/Vector Processing - WPMVP '16  
A key contribution is details on software techniques that achieve auto-vectorisation for a large production grade unstructured mesh application from the CFD domain so as to benefit from the vector units  ...  In this paper we present recent research exploring techniques to gain compiler auto-vectorization for unstructured mesh applications.  ...  ., for making the Hydra application and test cases available to us.  ... 
doi:10.1145/2870650.2870651 dblp:conf/ppopp/MudaligeRG16 fatcat:jnaew6qkijbhrj5evc2qqwl46u

Experience with Massive Parallelism for CFD Applications at NASA Ames Research Center [chapter]

Horst D. Simon
1992 Informatik aktuell  
One of these requirements is for unstructured, general communication with low latency and high bandwidth, which arises both in the unstructured application and in particle codes.  ...  Such a machine would have approximately 1 TFLOPS peak performance. Even at 1/50 of this peak performance, we would be able to perform CFD calculations at a level of 20 GFLOPS sustained.  ... 
doi:10.1007/978-3-642-77661-8_10 dblp:conf/supercomputer/Simon92 fatcat:urvafqmdcbfcflbias7acz5vvu

Analysis of Applicability of CFD Numerical Studies Applied to Problem When Pump Working as Turbine

Frank Plua, Victor Hidalgo, P. Amparo López-Jiménez, Modesto Pérez-Sánchez
2021 Water  
The present research depicts an analysis of the implementation of computational fluid dynamics (CFD) in the study of pumps such as turbines and PATs.  ...  To highlight the benefits of CFDs for PAT studies, results from both experimental tests have been compared to better understand the reproduction error phenomena.  ...  The same author [47] presented an analysis of blade influence number on the performance and pressure pulsations in PATs, concluding that there is an optimal blade number for a PAT to achieve the highest  ... 
doi:10.3390/w13152134 fatcat:t2xgesjlxbg25ko7lbexbdhl7q

Exploring Shared-Memory Optimizations for an Unstructured Mesh CFD Application on Modern Parallel Systems

Dheevatsa Mudigere, Srinivas Sridharan, Anand Deshpande, Jongsoo Park, Alexander Heinecke, Mikhail Smelyanskiy, Bharat Kaul, Pradeep Dubey, Dinesh Kaushik, David Keyes
2015 2015 IEEE International Parallel and Distributed Processing Symposium  
By applying several algorithmand architecture-aware optimization techniques for unstructured grids, we show a 6.9X speed-up in performance on a singlenode Intel R Xeon TM 1 E5 2690v2 processor relative  ...  An unstructured-grid implicit flow solver, which forms the backbone of computational aerodynamics, poses particular challenges due to its large irregular working sets, unstructured memory accesses, and  ...  Juan Alonso of Stanford University for his help in proof-reading this paper.  ... 
doi:10.1109/ipdps.2015.114 dblp:conf/ipps/MudigereSDPHSKD15 fatcat:fajgerf4zfgtnb2l2wafdnd27y

Advanced Experimental and Numerical Validation and Analysis of Propeller Slipstream Flows

Eric W. M. Roosenboom, Arne Stürmer, Andreas Schröder
2010 Journal of Aircraft  
E3). of the CFD data on the unstructured mesh and partly caused by numerical dissipation effects).  ...  Details of Unsteady Reynolds Averaged Navier-Stokes Simulation Approach The uRANS simulations are performed using the DLR TAU code [16], an unstructured finite volume vertex-based CFD solver developed  ... 
doi:10.2514/1.45961 fatcat:tgp76dspbjc4dmwfbm7gvp6tsq

Extension and Exploration of a Hybrid Turbulence Model on Unstructured Grids

C. Eric Lynch, Marilyn J. Smith
2011 AIAA Journal  
Acknowledgments This material is based upon work supported by the National Science Foundation under grant no. 0731034, "Advancing Wind Turbine Analysis and Design for Sustainable Energy."  ...  The authors would like to thank the FUN3D Development Team for their aid and discussions in this endeavor.  ...  [5, 10] has been extended and evaluated within an unstructured CFD methodology.  ... 
doi:10.2514/1.j051177 fatcat:grrmvq4omrairoqlo7ry5gulrm

High-order computational fluid dynamics tools for aircraft design

Z. J. Wang
2014 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
Cite this article: Wang ZJ. 2014 High-order computational fluid dynamics tools for aircraft design. Phil. Trans. R. Soc.  ...  In reality, high-order methods can achieve similar accuracy on a much coarser mesh than low-order methods.  ...  This approach has achieved remarkable success in many applications. Refer to the review article [12] in this Theme Issue for details.  ... 
doi:10.1098/rsta.2013.0318 pmid:25024419 pmcid:PMC4095896 fatcat:6uzll333tfccvaznx5izqwf3im

Enabling the environmentally clean air transportation of the future: a vision of computational fluid dynamics in 2030

J. P. Slotnick, A. Khodadoust, J. J. Alonso, D. L. Darmofal, W. D. Gropp, E. A. Lurie, D. J. Mavriplis, V. Venkatakrishnan
2014 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
technical contributions in the execution of the study and in the preparation of this document.  ...  The authors wish to thank the extended Vision 2030 CFD Study team: Joerg Gablonsky, Mori Mani, Robert Narducci and Philippe Spalart, The Boeing Company, and Robert Bush, Pratt & Whitney, for their valuable  ...  These issues lead to several observations: (i) a sustained exaFLOP (10 18 operations per second on a CFD application) may not be achieved until 2020 or later, (ii) HPC systems in 2020-2030 will be characterized  ... 
doi:10.1098/rsta.2013.0317 pmid:25024413 pmcid:PMC4095895 fatcat:7up57wr2dbbrfmzopfyddtmj4q

High performance parallel computing of flows in complex geometries: I. Methods

N Gourdain, L Gicquel, M Montagnac, O Vermorel, M Gazaix, G Staffelbach, M Garcia, J-F Boussuge, T Poinsot
2009 Computational Science & Discovery  
Authors are also grateful to teams of CERFACS involved in the management and maintenance of computing platforms (in particular the CSG group).  ...  Acknowledgment We thank Onera, Insitut Francais du Petrole (IFP) and development partners for their sustained effort to make elsA and AVBP successful projects.  ...  Unstructured meshes An example of an unstructured grid and its associated dual graph are shown in figure 8(a) .  ... 
doi:10.1088/1749-4699/2/1/015003 fatcat:dayjshjvjjfqxcluvg7pruvff4

The Application of CFD Technology in Analysis of Wind Environment

2017 DEStech Transactions on Materials Science and Engineering  
In this paper, we use Air-Pak to simulate the wind environment of an area.  ...  The need of natural ventilation in buildings has placed more emphasis on site planning in order to find the relationship between natural ventilation and the layout of architecture.  ...  Fluent was used in the study for simulation using unstructured grid meshing.  ... 
doi:10.12783/dtmse/ammme2016/6872 fatcat:7eh44fzb6fh5xo2zskfrod62t4

Heterogeneous Computing on Mixed Unstructured Grids with PyFR [article]

F. D. Witherden and B. C. Vermeire and P. E. Vincent
2014 arXiv   pre-print
In this paper we demonstrate the ability of PyFR to perform high-order accurate unsteady simulations of flow on mixed unstructured grids using heterogeneous multi-node hardware.  ...  PyFR is an open-source high-order accurate computational fluid dynamics solver for mixed unstructured grids that can target a range of hardware platforms from a single codebase.  ...  Acknowledgements The authors would like to thank the Engineering and Physical Sciences Research Council for their support via a Doctoral Training Grant and an Early Career Fellowship (EP/K027379/1).  ... 
arXiv:1409.0405v1 fatcat:gpaqvatz55f2hakxzqi43i3zwy

Accuracy details in realistic CFD modeling of an industrial centrifugal pump in direct and reverse modes

J. C. Páscoa, F. J. Silva, J. S. Pinheiro, D. J. Martins
2010 Journal of Thermal Science  
This is also useful to help in the selection of an adequate pump geometry that can work in both modes with best efficiency.  ...  Additional computations were performed in order to compare the numerical and experimental pump characteristics; these were obtained under normalized testing conditions.  ...  (b) In a second step we have recreated the mesh using structured and unstructured meshes. A major reduction in skewness was achieved.  ... 
doi:10.1007/s11630-010-0414-9 fatcat:c4m2un5mpzggvmewzqihrqa3tm

Turbomachinery computational fluid dynamics: asymptotes and paradigm shifts

W.N Dawes
2007 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
Accordingly, the challenges in the application of the current CFD orthodoxy to complex geometries are described in some detail.  ...  This development trajectory led over a surprisingly small number of years to an accepted approach-a 'CFD orthodoxy'.  ...  These days, all front rank solvers have good parallel performance and many can sustain that performance on meshes well into the 100 MC range.  ... 
doi:10.1098/rsta.2007.2021 pmid:17519196 fatcat:5lc4dfbor5d2rf2optmajmwq3u
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