functionbasicFlowFunction_m_flow_der
1st derivative of function that computes pressure drop for given mass flow rate
Extends from Modelica.Icons.Function (Icon for functions).
Information
Function that implements the first order derivative of IBPSA.Fluid.BaseClasses.FlowModels.basicFlowFunction_m_flow with respect to the mass flow rate.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.SIunits.MassFlowRate | m_flow | Mass flow rate in design flow direction | |
| Real | k | Flow coefficient, k=m_flow/sqrt(dp), with unit=(kg.m)^(1/2) | |
| Modelica.SIunits.MassFlowRate | m_flow_turbulent | Mass flow rate where transition to turbulent flow occurs | |
| Real | m_flow_der | Derivative of mass flow rate in design flow direction |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | dp_der | Derivative of pressure difference between port_a and port_b (= port_a.p - port_b.p) |
Revisions
-
May 1, 2017, by Filip Jorissen:
Revised implementation such that IBPSA.Fluid.BaseClasses.FlowModels.basicFlowFunction_m_flow is C2 continuous. See #725. -
July 29, 2015, by Michael Wetter:
First implementation to avoid in Dymola 2016 the warning "Differentiating ... under the assumption that it is continuous at switching".