Hi there,
I'm new to LIGGGHTS but I have been trying to use buoyancy and am getting odd results. I have read the documentation of 'fix buoyancy' and I am not sure about why dim level must be positive.
Documentation:
dim value = x or y or z
x, y, z = define the water level as x=const, y=const, z=const plane
level value = lev
lev = water level in length units, along the axis defined by dim
I tried setting y = 0 for my water level but it returned an error that level must be positive. I'm assuming that the "water level" means that water is defined as y0? Also, how does LIGGGHTS know (or does it assume) that the area y>level is air (i.e. no buoyancy, just gravity, applies here)?
Or is the correct way to do this to use regions?