Transferência de fluido por meio de um sifão vs. aplicação da equação de Bernoulli

Abstract

A basic physics problem consists in analyzing the transfer of fluid between two containers using a siphon. We show that a careful analysis of this situation, using Bernoulli's theorem, leads to conceptual misinterpretations if the fluid viscosity is neglected, as is usually required in the exercises. In this work, besides discussing possible solutions to the problem and identifying the conceptual mistakes involved, we present a model for the correct description of the system, considering energy loss in the siphon. Copyright by the Sociedade Brasileira de Física. Printed in Brazil.