Hydraulic Diameter

Item Data
Formula Hydraulic diameter is used for non-circular flow
Calculation Hydraulic Diameter
Drawing In rectangular duct

Hydraulic Diameter flow in rectangular pipe

In annular flow

Hydraulic Diameter flow in annular pipe

Nomenclature DH=Hydraulic Diameter
Related Hydraulic Diameter in rectangular pipe
Calculation of hydraulic diameter for rectangular flow
e=Height of the flow section (m)
l=Width of the flow section (m)
Calculation of hydraulic diameter for annular flow
R=Outside diameter of the tube (m)
K=Rinside/R
Rinside=Inside diameter of the tube (m)
Source Mecanique et Rheologie des fluides en genie chimique, Noel Midoux, Lavoisier Tec et Doc, page 197