Density flow solvers of vertical 2 dimensional model, Nays2dv, and 3-dimensiol model, Nays3dv are available from the following addresses.

Nays2dv
https://i-ric.org/yasu/Nays2dv/index.html

Nays3dv
https://i-ric.org/yasu/Nays3dv/index.html