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Re: [ESPResSo-users] Fluid Dynamics & Boundaries.

From: Georg Rempfer
Subject: Re: [ESPResSo-users] Fluid Dynamics & Boundaries.
Date: Fri, 26 Jun 2015 14:28:13 +0200

You can simply build your geometry by combining (a possibly large number) of the primitives we have implemented. Esprecially if you run a pure LB fluid without particles, there won't be a speed penalty, since the boundary flag field is only evaluated once upon initialization of the boundaries.

If that doesn't suffice, you will have to implement a new constraint (work along the lines of one of the simpler constraints, such as sphere or wall), and write respective lbboundary wrapper functions. The files are named constraint* and lbboundary*.

On Mon, Jun 22, 2015 at 11:53 AM, Rohit Goswami <address@hidden> wrote:
The lattice boltzmann wall constraints currently don't have much geometrical shapes to allow for a flow cell construction; how are these extended (as they have been to produce the stomatocyte and other complex geometries)?
Is there any documentation on adding complex wall constraints?
I know Espresso is mostly used for soft matter, but I hope to use the lbfluid and related constraints for a CFD analysis of a flow cell, so no particles; just hard boundaries need to be defined.


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