We now study the same problem for the incompressible materials .

现在我们对于不可压缩的材料来研究同样的问题。

We frequently regard gases as compressible , liquids as incompressible .

我们通常认为气体是可压缩的，液体是不可压缩的。

Gases are frequently regarded as compressible , liquids as incompressible .

人们通常认为气体是可压缩的，而液体是不可压缩的。

For incompressible fluids , both the mass flux and the volume flux are constant in a tube of flow .

对于不可压缩的流体来说，流管中的质量通量和体积通量都是恒定不变的。

These dramatic curlicues were generated by a computer simulation of the motion of a small body - in this case a flat , rigid plate - through an incompressible fluid , such as water or , in some conditions , air .

这些夸张的“人脸”是在用计算机模拟小物体移动过程中产生的图中所示为一个刚性板通过不可压缩流体，如水，或某些情况下的空气产生的移动。