东风 姜

Hello！
I have a problem that needs help，When I was doing particle fluid there was a problem of particle movement，the mesh is always unsmooth, I know this is because of the peristalsis of the particles，But I do not know where to control particle motion，Even if I create a new particle fluid，Do not adjust any settings，particles are also moving，Like the particles in the second image, I want to know which settings can control the surface of the particles to be flat？

I come from China, my English is not very good, if I said where is not very clear, please forgive me, please help me, thank you everyone!