.Modelica.Fluid.Pipes.BaseClasses.WallFriction

Information

This package provides functions to compute pressure losses due to wall friction in a pipe. Every correlation is defined by a package that is derived by inheritance from the package WallFriction.PartialWallFriction. The details of the underlying pipe wall friction model are described in the UsersGuide. Basically, different variants of the equation

dp = λ(Re,Δ)*(L/D)*ρ*v*|v|/2

are used, where the friction loss factor λ is shown in the next figure:

Contents

Name	Description
PartialWallFriction	Partial wall friction characteristic (base package of all wall friction characteristics)
NoFriction	No pipe wall friction, no static head
Laminar	Pipe wall friction for laminar flow in circular tubes (linear correlation)
QuadraticTurbulent	Pipe wall friction for turbulent flow in circular tubes (simple characteristic, mu not used)
LaminarAndQuadraticTurbulent	Pipe wall friction for laminar and turbulent flow in circular tubes (simple characteristic)
Detailed	Pipe wall friction for laminar and turbulent flow (detailed characteristic)