Hi ,

I have recently started using FreeFEM for my PhD studying, but I have encountered a problem when I am trying to model very thin domains in 2D.

I am trying to define a really thin rectangular shape (length 0.2 mm and width 20 micrometer), but I constantly get the following error:

**Exec error : Error points border points to close < diameter*1e-7**

I am using the following code:

include “ffmatlib.idp”

int C1=1;

int C2=2;

real tapeWidth=0.012;

real thicknessAgEpoxy=20*10^-6;
border C11(t=0., 1.){x=tapeWidth*t; y=0;label=C2;}

border C12(t=0., 1.){x=tapeWidth; y=thicknessAgEpoxy

*t;label=C2;}*

border C13(t=1., 0.){x=tapeWidtht; y=thicknessAgEpoxy;label=C2;}

border C13(t=1., 0.){x=tapeWidth

border C14(t=1., 0.){x=0; y=thicknessAgEpoxy

*t;label=C2;}*

int n=10;

mesh Th=buildmesh(C11(15n)+C12(1)+C13(5*n)+C14(1));

int n=10;

mesh Th=buildmesh(C11(15

plot(Th);

Am I missing some definition? The algorithm works when I define higher width values, so I assume there must be a definition of the minimum clearance that I have to do, but I couldn’t find something in the documentation/forum.

Thank you!

Regards,

Alex