… We propose an improved interface condition in order to account for head losses in pipe
when some discontinuous cross sections occur. … Nous proposons d'améliorer la condition
d'interface afin de prendre en compte la perte de charge pour un écoulement en conduite à
section variable discontinue. … Thus the paper is organized as follows: we firstly introduce
the new interface condition, we secondly explain how to compute left and right states
satisfying the new interface condition, we thirdly introduce the numerical scheme and we …