Thank you very much for your reply. I conducted a test today and found a very interesting phenomenon. For the DEM example (including chemical reactions), I used SMP for parallel computing on Windows 10 and found that the calculation rate decreased with the increase in the number of cores. What is the reason for this?
When a chemical reaction exists:
10 cores：
SMP is turned off：
When a chemical reaction is do not exists:
10 cores:
SMP is turned off：
It can be seen that regardless of whether there is a chemical reaction or not, the calculation rate decreases as the number of core increases. Why?
2dd_2023-09-27T183505.625318.zip (60.1 MB)