Thanks for the answer but I tried the first method and it didn t work. I wonder if this is my geometric model modeling process consider wrong, because in my flow solid coupling model, involves the surface and lines is more, when I share the topology after normal painting grid, I now have no clue to implement your second method, because I don't know where my model may have problems, so, can give me some advice about fluid solid coupling in geometric modeling? How to model can draw the grid normally and save the grid number, this may help me this question I guess
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