[求助]划分体网格时出现这样一个错误怎么改？

frankkong

划分完了面网格，在划分体网格时，出现错误，如下：tetrahedral meshing has failed for volume 1. this is usually caused by problems in the face meshes. check the skewness of your face meshes and make sure the face mesh sizes are not too large in areas of small gaps.
意思大体知道了，就是说在小空隙处的网格尺寸太大。但是该怎么改正呢？请各位给些意见，谢谢！