Hi,
I have a geometry which is not rectangular.Annular half circle
+some extensions beyond the circle.

I have a grid (x,y) with delta_x=delta_y
I have values of a specific quantities Q=Q(x,y),T=T(x,y) defined on these grid points.

I want to calulate an integral with Kernel Q(x,y)*T(x,y) defined over these shape.

How can I integrate it?

Rgrds,
Selim

If your domain in an annulus, then converting your data into polar coordinates leaves you with a rectangular domain interms of r and theta; i.e., T = T(r,theta), Q = Q(r,theta).

I think you can proceed with the integration after that.