From: Giacomo Fiorin (giacomo.fiorin_at_gmail.com)
Date: Thu Jun 08 2017 - 19:42:46 CDT
Hi Wasut, the wall constant for a wall boundary is not rescaled (check the
description of the physical unit):
http://www.ks.uiuc.edu/Research/namd/2.12/ug/node55.html#SEC
TION000132200000000000000
The rescaling by width^2 is only needed because a harmonic bias can be
defined on multiple variables, with very different units.
Note, however, than in the latest versions you have the ability to define
walls as a separate bias (and also change its force constant umbrella
sampling-style). The current syntax that you are referring to will remain
for backward compatibility.
Giacomo
On Thu, Jun 8, 2017 at 8:27 PM, Wasut Pornpatcharapong <
wpornpat_at_mail.ucsd.edu> wrote:
> Hi, I wonder if the actual force constant for CoordNum’s wall boundary is
> obtained from the “ForceConstant” in the colvars configuration file divided
> by the square of the width defined in colvars module for unbiasing usage?
>
>
>
> -Wasut
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>
-- Giacomo Fiorin Associate Professor of Research, Temple University, Philadelphia, PA Contractor, National Institutes of Health, Bethesda, MD http://goo.gl/Q3TBQU https://github.com/giacomofiorin
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