WOLFRAM SYSTEM MODELER
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Calculation of a generic pressure loss in dependence of a pressure loss coefficient.
The mass flow rate m_flow is determined by:
m_flow = rho*A_cross*(dp/(zeta_TOT *(rho/2))^0.5
|A_cross||as cross sectional area [m2],|
|dp||as pressure loss [Pa],|
|rho||as density of fluid [kg/m3],|
|m_flow||as mass flow rate [kg/s],|
|zeta_TOT||as pressure loss coefficient [-].|
Compressible case [Mass flow rate = f(dp)]:
The mass flow rate M_FLOW in dependence of the pressure loss dp for a constant pressure loss coefficient zeta_TOT is shown in the figure below.
Note that the verification for dp_pressureLossCoefficient is also valid for this inverse calculation due to using the same functions.