There would be an unusual amount of recombination in a mesh cell with
positive electrolyte on one side and negative electrolyte on the
other side of the mesh. The area of comparatively sheltered neutral
potential within the mesh would support large ion conductivity in
opposed directions, cations one way anions the other, due to
concentration gradients, and thus large amounts of recombination
would occur of the form:
H3O+ + OH- -> 2 H2O
within the mesh. I think this should give the vicinity a visible
blue-white glow.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/