What should be done when the reaction rate is too high?

MFiX How to
#1

I am simulating a case where I used a commonly used reaction kinetics and parameters, but it did not converge. When the reaction rate was multiplied by 0.0001, the reaction converged and could be run normally. The conclusion that can be drawn is that the reaction rate is causing the non-convergence, but is my method correct? Or will the result have an impact on the previous one?

#2

Hi @qianbinhui
You are correct that excessively high reaction rates can cause non-convergence. I suggest that you check that you are using the correct units.

I’m not sure what you mean “the result have an impact on the previous one”. And as usual, please attach your files if you want us to have a look.

– Charles

#4

1.zip (50.7 MB)

2.zip (26.3 MB)

if the reaction rate is too high and then multiplied by 0.0001, will the result have an impact? Secondly, my units are fine, here is my case, thank you for your reply.

#6

hi,It can be seen that it is a problem with the soaring temperature, or something else, as this is a validation model, and if it needs to be multiplied by a coefficient to converge, it should be a problem with my setting.