Variable Step Block Hybrid Method for Stiff Chemical Kinetics Problems

Integration of a larger stiff system of initial value problems emerging from chemical kinetics models requires a method that is both efficient and accurate, with a large absolute stability region. To determine the solutions of the stiff chemical kinetics ordinary differential equations that help in...

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Bibliographic Details
Published in:Applied sciences 2022-05, Vol.12 (9), p.4484
Main Authors: Soomro, Hira, Zainuddin, Nooraini, Daud, Hanita, Sunday, Joshua, Jamaludin, Noraini, Abdullah, Abdullah, Apriyanto, Mulono, Kadir, Evizal Abdul
Format: Article
Language:English
Subjects:
Boundary value problems
Chemical engineering
Chemical kinetics
chemical kinetics models
Differential equations
Integration
Kinetics
Methods
Numerical integration
ode15s
Ordinary differential equations
Reaction kinetics
stiff
variable step hybrid block
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Summary:Integration of a larger stiff system of initial value problems emerging from chemical kinetics models requires a method that is both efficient and accurate, with a large absolute stability region. To determine the solutions of the stiff chemical kinetics ordinary differential equations that help in explaining chemically reactive flows, a numerical integration methodology known as the 3-point variable step block hybrid method has been devised. An appropriate time step is automatically chosen to give accurate results. To check the efficiency of the new method, the numerical integration of a few renowned stiff chemical problems is evaluated such as Belousov–Zhabotinskii reaction and Hires, which are widely used in numerical studies. The results generated are then compared with the MATLAB stiff solver, ode15s.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12094484