How to create biphase system in Gromacs?

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1

GROMACS version:2018
GROMACS modification: Yes/No
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Hi all,
I am very new to gromacs can someone help me how to create 2 phases system in gromacs and to calculate interface surface tension

2

You can use Packmol https://m3g.iqm.unicamp.br/packmol/examples.shtml

I have used it many times in the past to create an oil-water interface and it worked perfectly

3

This can also be done entirely within GROMACS: Building Biphasic Systems

4

Teslim, can you help me in creating water-air interface and calculating its surface tension.