It certainly won't be that simple. You'll need to look through the literature to figure it out. I suspect it will require re-introducing a pressure into the equations and then transforming the continuity equation into an equation for pressure. On Thu, Oct 11, 2018 at 4:06 AM fgendr01 <fabien.gend...@univ-lr.fr> wrote: > > Thanks Daniel for your answer, > I used the continuity equation (nabla vector velocity) to obtain the equation > in temperature. > But actually, maybe we should use it as a constraint to my problem. > But now, how can I create this constraint ? with a new equation ? > I tried : velocity.divergence == 0 but it doesn’t work. > > Thank you, > > Fabien > > > > > Le 10 oct. 2018 à 17:43, Daniel Wheeler <daniel.wheel...@gmail.com> a écrit : > > Don't you still have a $\nabla . \vec{u} = 0$ equation though? It > doesn't go away. That equation becomes like a constraint. > > https://www.comsol.com/multiphysics/boussinesq-approximation > > On Wed, Oct 10, 2018 at 5:58 AM fgendr01 <fabien.gend...@univ-lr.fr> wrote: > > > Hi Daniel, > Thank you for your answer. > I thank you for trying to solve my problem. > About my set of the equation here is my reasoning. > > > > -- > Daniel Wheeler > _______________________________________________ > fipy mailing list > fipy@nist.gov > http://www.ctcms.nist.gov/fipy > [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ] > > > _______________________________________________ > fipy mailing list > fipy@nist.gov > http://www.ctcms.nist.gov/fipy > [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ]
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