Phase 'air' cannot create mixed wettability

[Xknightfyy]

Dear Professor Jeff Gostick,

Sorry to bother you again, but I can't solve this problem, hope to get your help.I am successful when I use openpnm to create water with different contact angles in different regions, but when I use air to create problems, is this a problem in openpnm itself? If not, how do I create contact angles in different areas? Excuse me, kindly ask for your help, thanks again!