I have a simple questions on terminology. Is there a difference between softening length and smoothing length? I have been using the 2 terms interchangeably as the minimum distance between particles for calculating particle interactions, and have not found any direct comparison of the 2 terms.
For context, I use computational/numerical physics simulations (specifically the GIZMO code) to simulate gaseous disks around galactic centers, where "particles" represent some mass of hydrogen. Perhaps it's also important to state that I am specifically looking at gravitational interactions at this point. I just want to make sure I am not missing something important.