Hi, All, Sorry, I didn't make it clear.
My geometry is mirror-symmetrical in all the three dirextions (x,y,z). The geometry is centered at the origin. The size of the epsilon obtained by (output-epsilon) is 656*255*120. I thought the size should be 656*254*120 or 656*256*120. The reason is: "whenever you output a field to a file, it is stored for the locations(i + 0.5,j + 0.5,k + 0.5): the centers of each grid voxel", so, the centers of grid voxels in my geometry is surrounding the orgin (the origin is not a center of the center grid). I should get an even number like 254 or 256 not 255 in the y direction. It should be something that I misunderstand. ..... Thanks a lot. Best, Jiangjun
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