non-positive volumes exist.

Grid Check

Domain Extents:
x-coordinate: min (m) = -2.500588e+000, max (m) = 5.100000e+000
y-coordinate: min (m) = -2.700000e+001, max (m) = 0.000000e+000
Volume statistics:

WARNING: non-positive volumes exist.

minimum volume (m3): 0.000000e+000
maximum volume (m3): 3.208902e-001
total volume (m3): 8.602320e+001
Face area statistics:
minimum face area (m2): 3.750086e-003
maximum face area (m2): 1.212737e+000
Checking number of nodes per cell.
Checking number of faces per cell.
Checking thread pointers.
Checking number of cells per face.
Checking face cells.
Checking bridge faces.
Checking right-handed cells.
Checking face handedness.
Checking face node order.
Checking element type consistency.
Checking boundary types:
Checking face pairs.
Checking periodic boundaries.
Checking node count.
Checking nosolve cell count.
Checking nosolve face count.
Checking face children.
Checking cell children.
Checking storage.
Done.

WARNING: Grid check failed.

非正体积存在。即是负体积，

。。。。。 再看看别人怎么说的。

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