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本帖最后由 yihanxu 于 2022-7-29 15:23 编辑
各位老师好,我从别人那里拿到一个mdp文件(内容如下),和我说是控压了的,但我看控压语句前都是;啊,不明白怎么就实现控压了,也没看出2019.5版是默认的给控压了。想请各位老师指教一下这个到底实现了控压吗;如果是,用的是什么控压方法;如果没控压为什么压力随时间的变化看起来也有规律呢。谢谢。体系压力如图,用后半段算得平均值是-24bar。
; Input file
title = CTAC-NaSal-45
;define = -DPOSRES
cpp = cpp
constraints = all-bonds
constraint_algorithm = LINCS
integrator = md
dt = 0.002 ; ps !
nsteps = 1000000 ; 2 ns
nstxout = 10000
nstvout = 10000
nstfout = 10000
nstlog = 10000
nstenergy = 500
;nstxtcout = 500
nstlist = 10
ns_type = grid
coulombtype = PME
cutoff-scheme = Verlet
rlist = 1.2
rcoulomb = 1.2
rvdw = 1.2
pbc = xyz
optimize_fft = yes
nstcomm = 1
comm-grps = System
; Berendsen temperature coupling is on
tcoupl = v-rescale
tc-grps = system
tau_t = 0.1
ref_t = 298
; Energy monitoring
energygrps = SOL MEI dan3
; Semiisotropic pressure coupling is now on
;Pcoupl = Berendsen
;Pcoupltype = isotropic
;tau_p = 1.0 ; 1 ; 5 5 5 5
;compressibility = 4.5e-5 ;4.5e-5 ; 4.5e-5 0 0 0
;ref_p = 1.0 ; 1.0 ; 1.0 0 0 0
; Generate velocites is on at 300K.
gen_vel = yes
gen_temp = 298
gen_seed = 173529
-----------------updates------------------------
体系有真空层,所以应该没有用控压。
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图片1.png
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体系压力
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