Week 9 - Senstivity Analysis Assignment

Aim: To,

• Write a code that takes all the reactions from the GRI mechanism and calculates 10 most sensitive reactions
• The sensitivity parameter should be with respect to the Temperature

Given: Initial temeprature= 1500K & Pressure=1 atm

Theory: Sensitivity analysis provides us with insight into the relationship between the change in the parameter to the change of the output of the model in this case temperature and concentration of species for a given reaction.

Code:

https://drive.google.com/file/d/1bBMRX-68q0vpH7vG4kxG1v2ebRFEN5mF/view?usp=sharing

Conclusion:

The positive sensitivity coefficient for a reaction suggests that there is a positive dependency of reaction rate on temperature and the auto-ignition delay will decrease. And vice-versa for negative sensitivity coefficient. As can be seen from the species molar concentration graphs, at auto-ignition the concentration of main driving radicals like OH & H go significantly up supporting the completion of reaction towards equilibrium eventually. Meanwhile, the concentration of reactant depletes.