Simulating a system with an imaginary barrier

From: Monika Kumari (Monika.Kumari_at_chemistry.iitd.ac.in)
Date: Thu Aug 18 2022 - 08:48:21 CDT

Dear all,
I am trying to maintain an ion concentration gradient in a lipid
membrane system. For this, I need to put an imaginary wall on one end of
the box (restricting only the ions not water) so that the ions don't
move to the other side via PBC. Also, the ions should move freely on one
side of the membrane except for the restriction to cross the barrier.
Can anyone suggest how to perform the simulation in NAMD?
Thank you.

Best regards,
Monika

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