流体分析时出现错误信息

zxb1219

请问计算时出现这个警告该怎么处理啊
*** WARNING *** CODE ADF6064:

    Fluid model could be wrong! The factorized diagonal 0.0000E+00 of  equation 23448 is too small.
    A constant pivot has been assigned to this equation.
流体模型有错误？？改变单元大小也不行啊。。。

cmhwgo

看看流体材料的单位是不是统一的。