Function that implements the first order derivative of IBPSA.Fluid.BaseClasses.FlowModels.basicFlowFunction_m_flow with respect to the mass flow rate.
function basicFlowFunction_m_flow_der extends Modelica.Icons.Function; input Modelica.SIunits.MassFlowRate m_flow "Mass flow rate in design flow direction"; input Real k(unit = "") "Flow coefficient, k=m_flow/sqrt(dp), with unit=(kg.m)^(1/2)"; input Modelica.SIunits.MassFlowRate m_flow_turbulent(min = 0) "Mass flow rate where transition to turbulent flow occurs"; input Real m_flow_der(unit = "kg/s2") "Derivative of mass flow rate in design flow direction"; output Real dp_der "Derivative of pressure difference between port_a and port_b (= port_a.p - port_b.p)"; end basicFlowFunction_m_flow_der;