【143】ACTRAN12.2与13 版本的体源结果为什么有差异？

Q：ACTRAN12.2与13 版本的体源结果为什么有差异？

A：Your both computations are correct. However in Actran 12.2 it is lighthill volume which is visualized, whereas in Actran 13 it is lighthill volume density which equals to lighthill volume in Actran 12.2 divided by the element’s volume (3D elements) or element’s surface (2D elements). This change has been implemented in Actran 13 because this description has the advantage to be independent of the mesh.