TY - GEN
T1 - An integrated co-dact and adaptive analytical jacobian (Aaj) method for efficient and robust modeling of complex combustion chemistry
AU - Sun, Weiqi
AU - Ju, Yiguang
N1 - Publisher Copyright:
© 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2021
Y1 - 2021
N2 - An adaptive analytical Jacobian (AAJ) method has been developed by integrating the correlated dynamic adaptive chemistry and transport (CO-DACT) method with an analytical Jacobian method for efficient and stable chemical integrations. The CO-DACT method can produce locally reduced chemiscal kinetics on-the-fly with negligible computational cost even for a large chemical kinetic model. Based on the locally reduced chemical kinetics, the analytical Jacobian method with sparse matrix solver is applied to integrate the ordinary differential equation (ODE) system with a reduced Jacobian matrix. The performances of the proposed AAJ method are compared with a benchmarked hybrid multi-timescale (HMTS) method. The results show that the AAJ method is accurate and stable. It and can accelerate the overall computation with much larger integration time steps.
AB - An adaptive analytical Jacobian (AAJ) method has been developed by integrating the correlated dynamic adaptive chemistry and transport (CO-DACT) method with an analytical Jacobian method for efficient and stable chemical integrations. The CO-DACT method can produce locally reduced chemiscal kinetics on-the-fly with negligible computational cost even for a large chemical kinetic model. Based on the locally reduced chemical kinetics, the analytical Jacobian method with sparse matrix solver is applied to integrate the ordinary differential equation (ODE) system with a reduced Jacobian matrix. The performances of the proposed AAJ method are compared with a benchmarked hybrid multi-timescale (HMTS) method. The results show that the AAJ method is accurate and stable. It and can accelerate the overall computation with much larger integration time steps.
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M3 - Conference contribution
AN - SCOPUS:85100264548
SN - 9781624106095
T3 - AIAA Scitech 2021 Forum
SP - 1
EP - 13
BT - AIAA Scitech 2021 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
Y2 - 11 January 2021 through 15 January 2021
ER -