diffusion-convection.edp (3.8 KB)
Hello everyone,i hove you are doing well,i’m solving a convection-diffution problem in solid/fluid but i’m trying to do a periodicity but it gave me this error " Periodic: the both number of edges is not the same" however i used the same mesh density for all borders and used fixborder=true,and thank you so much for your help
Hello Taha,
Your labels 9 and 11 are not set to the correct boundaries, indeed your “bottom” and “top” borders for solid3 and solid4 are inverted.
Moreover you did not give labels to some borders. In this situation freefem automatically gives some labels, and they can be identical to some of your labels. It then gives an error when you associate the corresponding label in periodic boundaries.
The solution is simple: give a label to all the boundaries.
Hello François,
It did work fine,thank you so mush !!