Hi Onno, Not really, I expect you are thinking of something related to water waves? I was hoping that many issues relating to free surface might be helped by defining function spaces that are constant throughout the column, to facilitate coupling between free surface and the bulk. We discussed this a while back, but nothing was implemented. all the best --cjc On 14 April 2016 at 15:36, Onno Bokhove <O.Bokhove@leeds.ac.uk> wrote:

Hi (-),

Can one in Firedrake split a volume integration in 3D,

in a horizontal part (dx dy) and a vertical part (dz),

as follows:

\int_x\int_y f(x,y,t) [ \int_z g(x,y,z,) dz ] dy dx

instead of

\iiint f(x,y,t) g(x,y,z,t) dx dy dz

?

Best wishes,

Onno

-- http://www.imperial.ac.uk/people/colin.cotter www.cambridge.org/9781107663916