Why in LIGGGHTS the cohesion density energy is in J/m3. When Johnson-Kendall-Roberts theory say that is the surface energy, and that is in J/m2?. What is the relation betwen both of that definitions?. Because in the literature the definition of the cohesion energy density is other than the adhesion, and that is related with chemestry, it seems here is a mistake in definitions. So, the process to calibrate this values with experimental data is confuse.
Please say to me what paper could I can read for understand the approach did for LIGGGHTS with this terms
Thanks
arnom | Mon, 01/14/2019 - 13:18
The cohesion energy density k
The cohesion energy density k is in J/m3 because the cohesive force F = k*A, where A is an area. So any other definition would require an additional length scale. With JKR theory you can probably work out the relationship between the two.
KR,
Arno
ting.hu@monash.edu | Wed, 02/24/2021 - 12:58
surface tension and cohesion energy density.
I found some experiments linking the surface tension and cohesion energy density.
But we don't have the equipment to do so.
F = k*A, the unit of k is J/m3
If we already got the surface tension σ in the unit of J/m2, is F = σ * L right? (A is the contact area and L is the contact radius.) Could someone share the right equation between F and σ, L? if I am going to change the equations in cohesion_sjkr.h?