the problem in simulation of detonation with hydrocarbon fuel vapor
 

Hey,
In my simulation of detonation with hydrocarbon fuel(only in gas phase),the reaction models proposed by Westbrook were used(in the article "simplified reaction mechanisms for the oxidization of hydrocarbon fuels in flames").The question is I cannot detonate the mixtures successfully(my code can simulate the H2-O2 detonation successfully). I tried a several ways ,from changing the mesh size to the initiation condition(with high temperature and high pressure or a detonation calculated by CEA).
My question is that is the reaction model I used right?
Does someone give me some advice?
Thank you.

In my opinion, it is better for you, to do some 1D detonation test cases first, to see how accurate your code is! Maybe the way you implement the combustion model and source term has got problem and you missing something, and even the initial condition can be the reason sometimes as well!