How do I implement a symmetry boundary condition for a D2Q9 model

Hi,

If D2Q9 lattice like this;

e_0 =(0,0)

e_1=(1,0)*c

e_2=(0,1)*c

e_3=(-1,0)*c

e_4=(0,-1)*c

e_5=(1,1)*c

e_6=(-1,1)*c

e_7=(-1,-1)*c

e_8=(1,-1)*c

Symmetry BC:

f2=f4

f6=f7

f5=f6 (Yo must be careful incoming and outcoming direction)

It is a little bit confusing with regards to f5

Should f5 not be equal to f8?

Yes, you absoletly right. I had a mistake

Daralcan

Thanks