[Nek5000-users] Calculating very small Lewis numbers in Nekton

[nek5000-users at lists.mcs.anl.gov]

Hello Neks,

I am solving a Reaction Advection Diffusion equation, where with my
non-dimensionalization, the Lewis Number(Le) is the parameter multiplying
the Laplacian. That is, Le is the  non-dimensional Diffusion co-efficient
of the species. Currently I can do Le = 0.1, but to reduce it further down
to 0.01, or 0.001, the spatial resolution has to be increased. I tried
doing that increasing the GLL points in SIZE file by increasing the lx1,
lxd, but till now I have been unsuccessful.

I am aware there is a special filtering that can be used( Fischer and
Mullen, 2001). My question is how to implement that in my .usr file. Is
there a routine?

Thanks,
Saikat


Saikat Mukherjee,
PhD Student,
Paul Research Group - http://www.me.vt.edu/mpaul/
Engineering Science and Mechanics,
Virginia Tech.
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