The liquid will fly out of the top of the reactor like gas

Hello teachers, I gave each fluid a different density and viscosity in usr_properties.f. I wanted to add a liquid in the fluid and deposit it at the bottom of the reactor. I gave this liquid greater density and viscosity, as well as the presence of solid particles inside the reactor (Mfix-dem model). But as I’ve tried many times, the liquid will come out of the top of the reactor like a gas. Do you know how to solve this situation? Thank you very much.

Hi Sun Cen. Please always attach your project files when seeking help, especially if you have edited usr_*f files. “Submit bug report” on the main menu will create a ZIP file which you can upload here.