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Performance optimizations for scalable CFD applications on hybrid CPU+MIC heterogeneous computing system with millions of cores

Yong-Xian Wang, Li-Lun Zhang, Wei Liu, Xing-Hua Cheng, Yu Zhuang, Anthony T. Chronopoulos
2018 Computers & Fluids  
For computational fluid dynamics (CFD) applications with a large number of grid points/cells, parallel computing is a common efficient strategy to reduce the computational time.  ...  Some benchmark cases from model and/or industrial CFD applications are tested on the Tianhe-1A and Tianhe-2 supercomputer to evaluate the performance.  ...  This work was funded by the National Natural Science Foundation of China (NSFC) under grant no. 61379056.  ... 
doi:10.1016/j.compfluid.2018.03.005 fatcat:b7yhhua6tzel5fwphn52ufendy

Globalized Newton-Krylov-Schwarz Algorithms and Software for Parallel Implicit CFD

William Gropp, David Keyes, Lois Curfman McInnes, M. D. Tidriri
2000 The international journal of high performance computing applications  
A study of the performance of the preconditioned NK matrix-free methods is given by Tidriri in [76] and [78].  ...  Because such applications require high resolution with reasonable turnaround, parallelization is essential.  ...  At the same time, the demand for high resolution with reasonable turnaround requires scalable parallelism and in particular -for cost effectiveness -latency-tolerant parallelism for applicability to networked  ... 
doi:10.1177/109434200001400202 fatcat:3sa6ddt7yzhfxdqx5fxudsk7ku

Automated generation of High-Performance Computational Fluid Dynamics Codes

Sandra Macià, Pedro J. Martínez-Ferrer, Eduard Ayguade, Vicenç Beltran
2022 Journal of Computational Science  
This paper presents the automated process of generating, from abstract mathematical specifications of Computational Fluid Dynamics (CFD) problems, optimised parallel codes that perform and scale as manually  ...  We consciously combine within Saiph, a DSL for solving CFD problems, low-level optimisations and parallelisation strategies, enabling high-performance single-core executions which effectively scale to  ...  This work is also supported by the Ministry of Economy of Spain through Severo Ochoa Center of Excellence Program (SEV-2015-0493).  ... 
doi:10.1016/j.jocs.2022.101664 fatcat:7z54kpriyzfdfjlzuam55ayfmm

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

Horst D. Simon
1992 Informatik aktuell  
The results obtained by Weeratunga, Barszcz, Fatoohi, and Venkatakrishnan on the simulated CFD applications benchmark are indicative for the current performance level of parallel machines on implicit CFD  ...  Performance results for "kernel" benchmarks do not fully reflect the computational requirements of a realistic, state-of-the-art CFD application.  ... 
doi:10.1007/978-3-642-77661-8_10 dblp:conf/supercomputer/Simon92 fatcat:urvafqmdcbfcflbias7acz5vvu

Analysis of impact of general-purpose graphics processor units in supersonic flow modeling

V.N. Emelyanov, A.G. Karpenko, A.S. Kozelkov, I.V. Teterina, K.N. Volkov, A.V. Yalozo
2017 Acta Astronautica  
The results obtained provide promising perspective for designing a GPU-based software framework for applications in CFD.  ...  CUDA technology is used for programming implementation of parallel computational algorithms.  ...  The author wishes to thank colleagues from the Russian Federal Nuclear Center (Sarov, Russia) for access to high performance computing resources and discussion of the computational results.  ... 
doi:10.1016/j.actaastro.2016.10.039 fatcat:lgr43n6aufci5dt4sdmft5frh4

Performance Optimization and Comparison of the Alternating Direction Implicit CFD Solver on Multi-core and Many-Core Architectures

Liang Deng, Dan Zhao, Hanli Bai, Fang Wang
2018 Chinese journal of electronics  
We perform a cross-platform performance analysis (between GPU and MIC), which serves as case studies for developers to select the right accelerators for their target applications.  ...  Experimental results show that the proposed GPU-enabled ADI solver can achieve a speedup of 5.5 on a Kepler GPU in contrast to two Sandy Bridge CPUs and our optimization techniques can improve the performance  ...  Performance evaluation on GPU Fig. 12 shows the results of the multi-stream optimization for fix grid sizes with different blocks.  ... 
doi:10.1049/cje.2018.03.011 fatcat:rlifu62wpjhu3dbqhvtv2ecixy

Improving the Flight Endurance of a Separate-Lift-and-Thrust Hybrid through Gaussian Process Optimization

Francis Gregory Ng, Alvin Chua
2021 International Journal on Advanced Science, Engineering and Information Technology  
A separate-lift-and-thrust hybrid is a modified fixed-wing drone which includes quadcopter rotors.  ...  Since drag estimations are costly, a Gaussian process optimization method was performed, as it is economical with respect to the required number of iterations.  ...  The valuable scholarship support aided in the completion of this study.  ... 
doi:10.18517/ijaseit.11.6.11415 fatcat:hdhwaemj3vd2lnm4tawcrt7tqa

Directive-based GPU programming for computational fluid dynamics

Brent P. Pickering, Charles W. Jackson, Thomas R.W. Scogland, Wu-Chun Feng, Christopher J. Roy
2015 Computers & Fluids  
We examine the process of applying the OpenACC Fortran API to a test CFD code that serves as a proxy for a full-scale research code developed at Virginia Tech; this test code is used to asses the performance  ...  In this work we analyze the popular OpenACC programming standard, as implemented by the PGI compiler suite, in order to evaluate its utility and performance potential in computational fluid dynamics (CFD  ...  Acknowledgments This work was supported by an Air Force Office of Scientific Research (AFOSR) Basic Research Initiative in the Computational Mathematics program with Dr.  ... 
doi:10.1016/j.compfluid.2015.03.008 fatcat:guzjdb7llnbsbosoczysbe3r7y

Alternating direction implicit time integrations for finite difference acoustic wave propagation: Parallelization and convergence

B. Otero, O. Rojas, F. Moya, J. Castillo
2020 Computers & Fluids  
In our numerical applications, the highest performances are displayed by the CFD and MFD CUDA codes that achieve speedups of 7.21x and 15.81x, respectively, relative to their C++ sequential counterparts  ...  This ADI integration is based on a second-order implicit Crank-Nicolson temporal discretization that is factored out by a Peaceman-Rachford decomposition of the time and space equation terms.  ...  Table 2 lists the amount of matrix operations performed by the nodal CFD method during I ∆t time iterations.  ... 
doi:10.1016/j.compfluid.2020.104584 fatcat:2mli7ix7ifhbvnhyc4aeuv7pwi

An unstructured CFD mini‐application for the performance prediction of a production CFD code

A. M. B. Owenson, S. A. Wright, R. A. Bunt, Y. K. Ho, M. J. Street, S. A. Jarvis
2019 Concurrency and Computation  
Evaluating the potential improvements offered by these developments is often a time consuming process due to the complexity of the applications involved, and the learning curve for new machines, architectures  ...  Additionally, mini-applications have been shown to facilitate rapid evaluation of new hardware and programming techniques; these applications capture the key performance characteristics of a parent code  ...  time of each kernel. 3 Model development To achieve accurate assessment of hardware and optimizations requires a model of the performance difference between MG-CFD and iflux.  ... 
doi:10.1002/cpe.5443 fatcat:wgo3ha2n3bfazceu7echylcvxe

AP-IO: Asynchronous Pipeline I/O for Hiding Periodic Output Cost in CFD Simulation

Ren Xiaoguang, Xu Xinhai
2014 The Scientific World Journal  
massively parallel CFD simulations, which can reduce the total execution time up to about 40%.  ...  Computational fluid dynamics (CFD) simulation often needs to periodically output intermediate results to files in the form of snapshots for visualization or restart, which seriously impacts the performance  ...  Nowadays, the mesh size of massively parallel CFD applications reaches million level, and the volume of a snapshot often scales to Gigabyte level.  ... 
doi:10.1155/2014/273807 pmid:24955390 pmcid:PMC3997917 fatcat:m4wl7hlg7rfy7abvuxajzvxx7e

Coupled system thermal Hydraulics/CFD models: General guidelines and applications to heavy liquid metals

A. Pucciarelli, A. Toti, D. Castelliti, F. Belloni, K. Van Tichelen, M. Moscardini, F. Galleni, N. Forgione
2020 Annals of Nuclear Energy  
A review of several works available in literature and involving different coupling approaches, codes, time-advancing schemes and application fields is given.  ...  A brief description of applications to heavy liquid metal systems is also reported; lessons drawn in the frame of these and other works are then considered in order to develop a set of good practice guidelines  ...  Acknowledgements This work was performed in the framework of the H2020 MYRTE project.  ... 
doi:10.1016/j.anucene.2020.107990 fatcat:mcv2cnlrebfvxln4msjg56yaca

Bridging the Performance-Programmability Gap for FPGAs via OpenCL: A Case Study with OpenDwarfs

Konstantinos Krommydas, Ahmed E. Helal, Anshuman Verma, Wu-Chun Feng
2016 2016 IEEE 24th Annual International Symposium on Field-Programmable Custom Computing Machines (FCCM)  
We then apply these optimization techniques to the OpenDwarfs benchmark suite, with its diverse parallelism profiles and memory access patterns, in order to evaluate the effectiveness of the optimizations  ...  Finally, we present the performance of the optimized OpenDwarfs, along with their potential re-factoring, to bridge the performance gap from programming in OpenCL versus programming in a HDL.  ...  Figure 2 shows the performance of the OpenDwarfs on both the fixed and reconfigurable architectures.  ... 
doi:10.1109/fccm.2016.56 dblp:conf/fccm/KrommydasHVF16 fatcat:btrd7srlovgt3a2jdujkezbkwq

Particle Swarm Optimization of Suction and Blowing on Airfoils at Transonic Speeds

Y. Volkan Pehlivanoglu, Bedri Yagiz, O. Kandil, O. Baysal
2010 Journal of Aircraft  
The focus of the present study is on the application of a selected design optimization methodology.  ...  There- fore, itis generally observed that PSO approach is more efficient than the SQP in terms of time and CFD calls. Using more actuators provides better aerodynamic performance.  ... 
doi:10.2514/1.c000233 fatcat:wrorcrphyrbf3pmo6omdikxvfa

The effect of rapid maxillary expansion on the upper airway's aerodynamic characteristics

Xin Feng, Yicheng Chen, Kristina Hellén-Halme, Weihua Cai, Xie-Qi Shi
2021 BMC Oral Health  
This study aims to evaluate the outcome of RME on the UA function in terms of aerodynamic characteristics by applying a computational fluid dynamics (CFD) simulation.  ...  CFD simulation at inspiration and expiration were performed based on the three-dimensional (3D) models of the UA segmented from the CBCT images.  ...  Acknowledgements Not applicable.  ... 
doi:10.1186/s12903-021-01488-1 pmid:33731068 fatcat:5lt4i3vrnne6nlhfkywtpaalo4
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