Re: [ESPResSo-users] Velocity in nanochannel

[David Schwörer]

Hi,

The constraint is a 'flat' surface.
The direction of the interaction has only a component orthogonal to the
wall - because this is what a lj does. therefore if the particle moves
along the wall, it only feels a force preventing it from entering the wall.
There is no friction between wall and particle.

Due to the increased orderering close to the wall, the particles in
front of the wall collide less often.
Therefore the particles on the wall are faster.

I think with transversal dpd you can add some friction, or by fixing
particles on the surface.

Best
David

> On 01/04/2015 11:10 PM, roya moghaddasi wrote:
> > Hello Espresso users;
> >
> > I have a nanochannel in my simulation, I also have lattice boltzmann
> > inside the nanochannel, the problem is that when I calculate the
> > velocity near the nanochannel, it is not close to zero, instead it is
> > greater than the center of the channel, which is, in my view
> > unrealistic. The case is the same when I eliminate LB and use langevin
> > dynamic.
> >
> > Can anyone help me to solve this problem?
> >
> > Best,
> > Roya
>
>
>

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