WOLFRAM SYSTEM MODELER

dp_volumeFlowRate_DP

Generic pressure loss | calculate pressure loss | quadratic function (dp=a*V_flow^2 + b*V_flow)

Wolfram Language

In[1]:=
SystemModel["Modelica.Fluid.Dissipation.PressureLoss.General.dp_volumeFlowRate_DP"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Calculation of a generic pressure loss with linear and/or quadratic dependence on volume flow rate. Please note that the sum of a and b has to be greater zero. The function can be used to calculate pressure loss at known mass flow rate or mass flow rate at known pressure loss.

Generally this function is numerically best used for the incompressible case, where the mass flow rate (m_flow) is known (as state variable) in the used model and the corresponding pressure loss (DP) has to be calculated. On the other hand the function dp_volumeFlowRate_MFLOW is numerically best used for the compressible case if the pressure loss (dp) is known (out of pressures as state variable) and the mass flow rate (M_FLOW) has to be calculated. See more information.

Syntax

DP = dp_volumeFlowRate_DP(IN_con, IN_var, m_flow)

Inputs (3)

IN_con

Type: dp_volumeFlowRate_IN_con

Description: Input record for function dp_volumeFlowRate_DP

IN_var

Type: dp_volumeFlowRate_IN_var

Description: Input record for function dp_volumeFlowRate_DP

m_flow

Type: MassFlowRate (kg/s)

Description: Mass flow rate

Outputs (1)

DP

Type: Pressure (Pa)

Description: Output for function dp_volumeFlowRate_DP

Revisions

2018-11-21 Stefan Wischhusen: Fixed problem for linear case (a=0 and b>0) and obsolete regularization for a>0 and b>0.