.Modelica.Fluid.Fittings.GenericResistances.VolumeFlowRate .Modelica.Fluid.Fittings.GenericResistances.VolumeFlowRateThis component models a generic resistance parameterized with the volume flow rate:
dp = a*V_flow^2 + b*V_flow
m_flow = rho*V_flow
with
| a | as quadratic coefficient [Pa*s^2/m^6], |
| b | as linear coefficient [Pa*s/m3], |
| dp | as pressure loss [Pa], |
| m_flow | as mass flow rate [kg/s], |
| rho | as density of fluid [kg/m3], |
| V_flow | as volume flow rate [m3/s]. |
The geometry parameters of energy devices necessary for the pressure loss calculations are often not exactly known. Therefore the modelling of the detailed pressure loss calculation has to be simplified. This components use a linear and a quadratic dependence of the pressure loss on the volume flow rate. It is assumed that neither mass nor energy is stored in this component. In the model basically a function is called to compute the mass flow rate as a function of pressure loss. Also the inverse of this function is defined, and a tool might use this inverse function instead, in order to avoid the solution of a nonlinear equation.
The details of the model are described in the documentation of the underlying function.