[gmx-users] How to perform a lipid bilayer MD simulation in Gromacs with mechanical stress?

[laura pulido]

Hi all,
I'm trying to implement a MD simulation of a lipid bilayer in Gromacs
applying a mechanical stress by modifying the lateral pressure value.
However, I'm not sure about which parameters of the .mdp file should I
modify to apply a tension to the system.
According to what I have read in the literature, this can be done by
providing to ref_p as input the value of each of the six tension components
(xx, xy, yy, zz, zx,zy). In this case, what should be the value of each of
these components if i want to apply a lateral tension -0.5 bar.
Thanks in advance.