Hi Everyone 

I am working on calculating interfacial tension using DPD. Initially i used a box size of 15-6-6 and invesitigated  many parameters. Now i got a high speed computer and i want to increase the no of molecules. Now i used box of 30-12-12. But now i am not getting the same result even after increasing no of steps to i million. Can you please comment how can i get same results and why we are getting differnt results. Everything remaining like bead lenght properties interaction  is same

Thanks