[gmx-users] EM curve question

[parto haghighi]

Dear GMX-users
I am working on lipid-drug system.I have done these stages:
1.creating topology for drug and lipid
2.solvation
3.Ion addition
4.Energy minimization
5.NVT
My question is,why does the energy and temperature curves converge to
zero(I have used 320 K for my temperature in mdp file)?

Thanks a lot in advance.
 P.Haghighi