LARHYSS Journal
Volume 17, Numéro 2, Pages 31-40
2020-06-01
Authors : Achour Bachir . Amara Lyes .
The Hazen-Williams equation is still widely used nowadays, despite its applicability limits that many research workers have highlighted. The equation contains a constant coefficient C which depends only on the material of the pipe. However, many studies have asserted that C should depend on both the relative roughness of the pipe and the Reynolds number. This dependence of C on the relative roughness and the Reynolds number was highlighted by Liou, in particular, through a relationship that interests the present study. A readjustment of Liou's relationship led to an implicit dimensionless equation that was translated into a C dimensionless diagram. Furthermore, the derived dimensionless relationship from the transformation of the Hazen-Williams equation, along with the dimensionless diagram, speeds up the slope of the energy grade line calculation. The dimensionless C relationship reaches a maximum for a given value of the relative roughness. A deep analysis of this relationship led to the successful establishment of the explicit dependence of C maximum on the relative roughness.
Hazen-Williams coefficient ; Darcy-Weisbach ; Galileo number ; Dimensionless diagram
بوسالم أحلام
.
عابد يوسف
.
ص 117-132.
Yahia Zeghoudi
.
pages 74-88.
Said Houari Amel
.
pages 257-268.
Achour Bachir
.
Amara Lyes
.
pages 219-227.
Achour Bachir
.
Amara Lyes
.
pages 81-98.