Hello,
I continued to stare at https://www.mail-archive.com/fipy@nist.gov/msg02641.html. I realized Keff must be effective thermal conductivity as described in: Salazar, Agust n. “On Thermal Diffusivity.” *European Journal of Physics* 24, no. 4 (July 1, 2003): 351–58. https://doi.org/10.1088/0143-0807/24/4/353 . For years I sat right next to grad students whose entire degree was in computing Keff of composite materials via ANSYS/COMSOL, but I still looked at https://www.mail-archive.com/fipy@nist.gov/msg02641.html with incomprehension. I realized all that was being done in https://www.mail-archive.com/fipy@nist.gov/msg02641.html must be to compute Keff of the finite volume which contains the thermal contact resistance, and then to assign thermal conductivity of the finite volume face at the interface to Keff. The Salazar paper also gives equations for effective thermal diffusivity, which is what I was asking for in the current thread. Now I think I mostly have what I need. I still need FiPy code for: dAP1/(dAP1+dAP2) and dAP2/(dAP1+dAP2) where dAP1 and dAP2 were distances from cell center to cell face for cells on either side of the interface. If these FiPy expressions are unavailable, I would think assuming .5 is going to be OK... Thanks On Thu, Jul 12, 2018 at 2:28 PM Daniel Wheeler <daniel.wheel...@gmail.com> wrote: > I think you can do this by aligning the mesh with the contact region > and specifying the diffusion coefficient at the contact faces. > > On Thu, Jul 12, 2018 at 12:28 PM, Drew Davidson <davidson...@gmail.com> > wrote: > > Hello, > > > > > > I’m sorry for not being more specific. I was trying to incorporate > > https://www.mail-archive.com/fipy@nist.gov/msg02626.html by reference. > > -- > 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 ]
