用cfx时出错

轩晨天空

提示The ANSYS CFX solver exited with return code 1.   No results file has been created.求教什么原因

轩晨天空

当时提示ERROR #002100048 has occurred in subroutine SU_BNEXT.              |
| Message:                                                           |
| All vertices for a fluid domain lie on boundaries.  This is        |
| considered to be a fatal error because control volume gradients    |
| cannot be calculated, leading to serious discretization error.     |
|                                                                    |
| A common cause for this error is a mesh which is only one          |
| element thick, without symmetry or 1:1 periodicity on the lateral  |
| boundaries.  If you have this situation, and the domain is         |
| two-dimensional, please change the lateral boundary conditions     |
| to symmetry or 1:1 periodicity.  Alternatively, for                |
| three-dimensional simulations, please ensure that your mesh        |
| has at least two elements across.                                  |
|                                                                    |
| Execution is terminating.  This error message can be bypassed by   |
| setting the expert parameter 'boundary vertex check = f', but      |
| be aware that doing so may lead to sigificant solution error.