# Try to develop and modify

Hi everyone:

I want to change some parameters in the equation. Can I modify the momentum equation of DualSPHysics and where can I find the equation and modify it?

Thank you!

Hi everyone:

I want to change some parameters in the equation. Can I modify the momentum equation of DualSPHysics and where can I find the equation and modify it?

Thank you!

## Comments

Dear @Sding ,

you can find momentum equation in JSPHCPU library in DualSPHysics5ReCpu_vs2015 in Dualsphysics\src\VS file.

I find it. Thank you!