Re: [ESPResSo-users] Simulation of fluid using LB-method

[Ulf Schiller]

On 01/30/2014 01:44 PM, Wink, Markus wrote:
> Is there any way to avoid that problem in espresso or is it due to the
> nature of the lattice Boltzmann implementation and do I have to accept
> that. I am asking, since I have seen some other MD-simulations, which
> also used the LB method but did not show that problem.

I suspect that the external force is not taken into account in the 
measurement of the hydrodynamic velocity. So what you see is the bare 
lattice velocity which is lower by 0.5*h*F. If you correct with the 
latter, do you get a better profile?

Cheers,
Ulf

--
Dr. Ulf D. Schiller                        Building 04.16, Room 3006
Institute of Complex Systems (ICS-2)       Phone:   +49 2461 61-6144
Forschungszentrum Jülich, Germany          Fax:     +49 2461 61-3180

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