symmetry boudary condition
 

I have used symmetry boundary condition for the front and back face of the rectangular cuboid for a 2D case. Do I need to specify the same symmetry boundary conditions for the 3D case of same simulation.??? or leave these faces as walls by default.??? any suggestion?? thanks

Re: symmetry boudary condition
 

Hi Sir MAB,

for 3D, leave as an adiabatic wall, but choose a big width on z direction. when u make a 2d analysis, there is a need to develop a 3D model wide enough to eliminate the wall effects on the calculation, with the objective of comparing with the 2D results widely shown in literature.

For 2D (i don´t know how much is your thickness, maybe would it be of one millimeter?) use the symmetry condition, as you have been used.

Be of good cheer !