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Re: [ESPResSo-users] Boundary condition and external force on electrokin

From: Georg Rempfer
Subject: Re: [ESPResSo-users] Boundary condition and external force on electrokinetics fluid
Date: Thu, 14 Aug 2014 09:50:30 +0200


currently there is no interface for that feature. This is because initially we defined a separate electrokinetics species for the neutral fluid component as well and didn't implement the LB body force interface when we moved away from it. Are you interested in calculating streaming potentials?


2014-08-13 21:36 GMT+02:00 Luman Qu <address@hidden>:
Hi all,

I am exploring the newly-included Electrokinetics feature and have some questions. I would like to simulate continuous flow under external force (e.g. gravity).

1. According to the user guide, there is no option to apply an external force on the electrokinetic (EK) fluid. One can only apply electric force on the species in the EK fluid. Is there a way to apply an external force on the fluid itself (I believe it is possible for the lbfluid)?

2. I am a bit confused about the periodic boundary condition defined in the Espresso. Say if I want to simulate a continuous flow with two open ends (like a flow in a pipe), would the same fluid leaving from one end enter pipe again from the other end? Or it is the "fresh" fluid as initialized enter the pipe? 

Thank you so much in advance for any clarification.


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