Index Catalog // ScholarsArchive@OSU

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...
Resource Type:: Article
Full Text:: fluid dynamics Kyle E. Niemeyer · Chih-Jen Sung Received: date / Accepted: date Abstract The progress

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...
Resource Type:: Article
Full Text:: Chih-Jen Sung‡ School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State

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...
Resource Type:: Article
Full Text:: simulations using GPUs Kyle E. Niemeyera,b,1,∗, Chih-Jen Sungb aDepartment of Mechanical and Aerospace

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...
Resource Type:: Article
Full Text:: . Niemeyerb, Chih-Jen Sunga aDepartment of Mechanical Engineering, University of Connecticut, Storrs, CT

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

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...
Resource Type:: Article
Full Text:: Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China Chih-Jen

Low-temperature, Inkjet-printed p-Type Copper(I) Iodide-based Thin-Film Transistors

Creator:: Gorecki, Jenna Y.
Abstract:: Inkjet-printed p-type copper(I) iodide-based TFTs were successfully fabricated. As-printed copper(I) halide semiconductor films, such as CuI, CuBrI, and CuClI, were used as p-type active channel layers for TFTs. The entire process of the TFTs fabrication was maintained under 150 °C, which is compatible with flexible plastic substrates and transparent glass...
Resource Type:: Masters Thesis
Full Text:: Chih-Hung Chang Inkjet-printed p-type copper(I) iodide-based TFTs were successfully

Fabrication of CuInGaSe₂ thin film solar cells using low-cost air-stable inks

Creator:: Wang, Wei
Abstract:: CuInGaSe₂ (CIGS), a promising thin film solar cell material, has gained lots of attention in decades due to its high energy conversion efficiency and potential lower manufacture cost over conventional Si solar cells. As a cheaper processing method compared to vacuum-based techniques, solution-based deposition has been successfully applied to fabricate...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________ Chih-Hung Chang CuInGaSe2 (CIGS), a promising thin film solar cell material, has

Growth, Characterizations, and Applications of Patterned Nanostructured Thin Film

Creator:: Gao, Zhongwei
Abstract:: A unique microreactor-assisted nanomaterial synthesis and printing process was studied for the fabrication of patterned metal oxide nanostructured thin films. The process uses a continuous flow microreactor to control and generate a reactive chemical flux that was transported to a patterned microfluidic channel. The microreactor-assisted nanomaterial synthesis process can generate...
Resource Type:: Dissertation
Full Text:: Abstract approved: ______________________________________________________ Chih-Hung Chang A

ScholarsArchive@OSU

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

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

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

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

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

Counterflow ignition of n-butanol at atmospheric and elevated pressures

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

Low-temperature, Inkjet-printed p-Type Copper(I) Iodide-based Thin-Film Transistors

Fabrication of CuInGaSe₂ thin film solar cells using low-cost air-stable inks

Growth, Characterizations, and Applications of Patterned Nanostructured Thin Film

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