The Application of Saint-Venant Principle to Fluid

摘要

As we all known, Saint-Venant principle utilized widely in solid mechanics field. Using this principle can deal with the boundary conditions which caused by static equivalence. Based on the idea, a similar conclusion has been put forward in fluid field. That is under same flux and flow zone, and only changes the inlet shape. The result of this paper posts that there is almost no difference in the flow field which far from the inlet. In order to explain the phenomena, a demo has been employed.