Vidange d'un r\'eservoir

TL;DR

This paper investigates how the flow regime of a fluid in a reservoir changes from perfect to viscous depending on outlet tube length, demonstrating a transition governed by a theoretical criterion.

Contribution

It introduces a criterion that predicts the transition between perfect and viscous flow regimes based on outlet tube length in reservoir drainage.

Findings

Flow regime depends on outlet tube length.

Transition between regimes is governed by a theoretical criterion.

Experimental validation of the regime change.

Abstract

We show in this article that depending on the flow conditions the same fluid can be considered as a perfect fluid or on the contrary as viscous fluid. These properties are addressed by emptying a tank. we show that we pass from one regime to another by just changing the length of the outlet tube of the tank is drained. This change of regime takes place in accordance with a criterion defined in the theoretical part.