Well, the properties are correct. I am simulating a real experiment where I have a tantalum wire inside toluene with this heat input and what we observe is 3 degrees temp rise on the surface of the wire in 1second. Why cant I see it with this code? Thank you very much in advance! Kind regards, J.
On Thu, Jan 17, 2013 at 8:58 PM, Jonathan Guyer <[email protected]> wrote: > > On Jan 17, 2013, at 12:58 PM, John Assael wrote: > > > from fipy import * > > import time > > > > dx = dy = 10 > > nx = ny = 100 > > L = dx * nx > > mesh = Grid2D(dx=dx, dy=dy, nx=nx, ny=ny) > > > > # Fluid Properties > > tc0=0.141 > > den0=867. > > cp0=1717 > > > > # Wire Properties > > tcw=57.5 > > denw=16690. > > cpw=135. > > Qw=1.5*10**9 > > > > However the change of Temperature only takes place within the radius of > the wire and do not seem to affect the outer fluid. Do you know how can I > fix this? > > The scales of your parameters are completely different. You are supplying > 1.5e9 W/m**3 in the wire, but the diffusion term only dissipates 5.75 > W/m**3 for a 10 K temperature difference (k dT / dx**2) on the wire side; > it's even smaller in the fluid. You either need terms of the same order or > you need to accept that diffusion is not important at the rate that Q is > pumping energy into your wire. > > > _______________________________________________ > fipy mailing list > [email protected] > http://www.ctcms.nist.gov/fipy > [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ] > -- ..:: ic3man.gr ::.. software | design | development _/_/_/ email: [email protected] _/_/_/ www : http://www.ic3man.gr ------------------------------------------------------------------ This e-mail and any attachments are confidential. You may not copy or disseminate any information contained in them to anyone other than the intended recipient. If you are not the intended recipient please contact the sender by reply e-mail and destroy all copies of the original message immediately. ------------------------------------------------------------------
_______________________________________________ fipy mailing list [email protected] http://www.ctcms.nist.gov/fipy [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ]
