What is the idea behind doubling the number of boundary particles?
I have noticed this possibility among the constants of the settings file:
<lattice bound="2" fluid="1" />
as also illustrated in the XML file guide.
It also shows up in the standard output of GenCase, where the number of particles is doubled
List of Points: Points -> Floating-Boundary particles: block[ 0] (mk: 31): 729 --> 1458 block[ 1] (mk: 51): 729 --> 1458 block[ 2] (mk: 52): 729 --> 1458
In this example 729 is 9³, since I have a cube with edge length equal to 8dp.
I then wondered what is the reason for this 1|2 choice, whether there is a recommended option and to which advantage. Thanks in advance for addressing these questions.