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  • BradyCounterflowIgnitionOfN-Butanol.pdf

    Creator:
    Brady, Kyle B., Hui, Xin, Sung, Chih-Jen, and Niemeyer, Kyle E.
    Abstract:
    Critical to the development of predictive combustion models is a robust understanding of the coupled effects of chemical kinetics and convective-diffusive transport at both atmospheric and elevated pressures. The present study describes a new variable-pressure non-premixed counterflow ignition experiment designed to address the need for well-characterized reference data to validate...
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    elevated pressures Kyle Brady †a , Xin Hui a,b , Chih-Jen Sung a , Kyle Niemeyer c a

  • BradyCounterflowIgnitionOfN-ButanolAppendixC.pdf

    Creator:
    Brady, Kyle B., Hui, Xin, Sung, Chih-Jen, and Niemeyer, Kyle E.
    Abstract:
    Critical to the development of predictive combustion models is a robust understanding of the coupled effects of chemical kinetics and convective-diffusive transport at both atmospheric and elevated pressures. The present study describes a new variable-pressure non-premixed counterflow ignition experiment designed to address the need for well-characterized reference data to validate...
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    Skeletal - 1 atm Skeletal - 5 atm Skeletal - 10 atm Ig n iti o n D e la y ( m s ) 1000/T (1/K

  • BradyCounterflowIgnitionOfN-ButanolAppendixB.pdf

    Creator:
    Brady, Kyle B., Hui, Xin, Sung, Chih-Jen, and Niemeyer, Kyle E.
    Abstract:
    Critical to the development of predictive combustion models is a robust understanding of the coupled effects of chemical kinetics and convective-diffusive transport at both atmospheric and elevated pressures. The present study describes a new variable-pressure non-premixed counterflow ignition experiment designed to address the need for well-characterized reference data to validate...

  • BradyCounterflowIgnitionOfN-ButanolAppendixA.pdf

    Creator:
    Brady, Kyle B., Hui, Xin, Sung, Chih-Jen, and Niemeyer, Kyle E.
    Abstract:
    Critical to the development of predictive combustion models is a robust understanding of the coupled effects of chemical kinetics and convective-diffusive transport at both atmospheric and elevated pressures. The present study describes a new variable-pressure non-premixed counterflow ignition experiment designed to address the need for well-characterized reference data to validate...

  • Counterflow ignition of n-butanol at atmospheric and elevated pressures

    Creator:
    Brady, Kyle B., Hui, Xin, Sung, Chih-Jen, and Niemeyer, Kyle E.
    Abstract:
    Critical to the development of predictive combustion models is a robust understanding of the coupled effects of chemical kinetics and convective-diffusive transport at both atmospheric and elevated pressures. The present study describes a new variable-pressure non-premixed counterflow ignition experiment designed to address the need for well-characterized reference data to validate...
    Resource Type:
    Article

  • Recent progress and challenges in exploiting graphics processors in computational fluid dynamics

    Creator:
    Niemeyer, Kyle E. and Sung, Chih-Jen
    Abstract:
    The progress made in accelerating simulations of fluid flow using GPUs, and the challenges that remain, are surveyed. The review first provides an introduction to GPU computing and programming, and discusses various considerations for improved performance. Case studies comparing the performance of CPU- and GPUbased solvers for the Laplace and...
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    Article
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    fluid dynamics Kyle E. Niemeyer · Chih-Jen Sung Received: date / Accepted: date Abstract The progress

  • NiemeyerKyleMechIndMfgEngnMechanismReductionForMulticomponent(SupplementaryMaterial).pdf

    Creator:
    Niemeyer, Kyle E. and Sung, Chih-Jen
    Abstract:
    Strategies and recommendations for performing skeletal reductions of multicomponent surrogate fuels are presented, through the generation and validation of skeletal mechanisms for a three-component toluene reference fuel. Using the directed relation graph with error propagation and sensitivity analysis method followed by a further unimportant reaction elimination stage, skeletal mechanisms valid...
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    study using toluene reference fuels Kyle E. Niemeyer and Chih-Jen Sung Supplementary material The

  • Accelerating moderately stiff chemical kinetics in reactive-flow simulations using GPUs

    Creator:
    Niemeyer, Kyle E. and Sung, Chih-Jen
    Abstract:
    The chemical kinetics ODEs arising from operator-split reactive-flow simulations were solved on GPUs using explicit integration algorithms. Nonstiff chemical kinetics of a hydrogen oxidation mechanism (9 species and 38 irreversible reactions) were computed using the explicit fifth-order Runge–Kutta–Cash–Karp method, and the GPU-accelerated version performed faster than single- and six-core CPU...
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    Article
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    simulations using GPUs Kyle E. Niemeyera,b,1,∗, Chih-Jen Sungb aDepartment of Mechanical and Aerospace

  • NiemeyerKyleMechIndMfgEngnMechanismReductionForMulticomponent.pdf

    Creator:
    Niemeyer, Kyle E. and Sung, Chih-Jen
    Abstract:
    Strategies and recommendations for performing skeletal reductions of multicomponent surrogate fuels are presented, through the generation and validation of skeletal mechanisms for a three-component toluene reference fuel. Using the directed relation graph with error propagation and sensitivity analysis method followed by a further unimportant reaction elimination stage, skeletal mechanisms valid...
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    multicomponent surrogates: a case study using toluene reference fuels Kyle E. Niemeyera,∗, Chih-Jen Sungb

  • Reduced Chemistry for a Gasoline Surrogate Valid at Engine-Relevant Conditions

    Creator:
    Niemeyer, Kyle E. and Sung, Chih-Jen
    Abstract:
    A detailed mechanism for the four-component RD387 gasoline surrogate developed by Lawrence Livermore National Laboratory has shown good agreement with experiments in engine-relevant conditions. However, with 1388 species and 5933 reversible reactions, this detailed mechanism is far too large to use in practical engine simulations. Therefore, reduction of the detailed...
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    Article
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    Reduced chemistry for a gasoline surrogate valid at engine-relevant conditions Kyle E. Niemeyer∗,† and

  • Mechanism reduction for multicomponent surrogates: A case study using toluene reference fuels

    Creator:
    Niemeyer, Kyle E. and Sung, Chih-Jen
    Abstract:
    Strategies and recommendations for performing skeletal reductions of multicomponent surrogate fuels are presented, through the generation and validation of skeletal mechanisms for a three-component toluene reference fuel. Using the directed relation graph with error propagation and sensitivity analysis method followed by a further unimportant reaction elimination stage, skeletal mechanisms valid...
    Resource Type:
    Article

  • Using SIMD and SIMT vectorization to evaluate sparse chemical kinetic Jacobian matrices and thermochemical source terms

    Creator:
    Curtis, Nicholas J., Niemeyer, Kyle E., and Sung, Chih-Jen
    Abstract:
    Accurately predicting key combustion phenomena in reactive-flow simulations, e.g., lean blow-out, extinction/ignition limits and pollutant formation, necessitates the use of detailed chemical kinetics. The large size and high levels of numerical stiffness typically present in chemical kinetic models relevant to transportation/power-generation applications make the efficient evaluation/factorization of the chemical kinetic...
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    Article
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    chemical kinetic Jacobian matrices and thermochemical source terms Nicholas J. Curtisa,∗, Kyle E

  • Development of efficient and accurate skeletal mechanisms for hydrocarbon fuels and kerosene surrogate

    Creator:
    Zhong, Fengquan, Ma, Sugang, Zhang, Xinyu, Sung, Chih-Jen, and Niemeyer, Kyle E.
    Abstract:
    In this paper, the methodology of the directed relation graph with error propagation and sensitivity analysis (DRGEPSA), proposed by Niemeyer et al. [Combustion and Flame 157 2010) 1760–1770], and its differences to the original directed relation graph method are described. Using DRGEPSA, the detailed mechanism of ethylene containing 71 species...
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    Article
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    Kyle E. Niemeyer School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State