model Liquid
extends HydraulicsByFluidon.Media.Base.BaseFluid;
parameter HydraulicsByFluidon.Media.Types.LiquidTypes fluidType = HydraulicsByFluidon.Media.Types.LiquidTypes.HLP46 "Type of Liquid";
parameter Modelica.SIunits.Temperature fluidTemperature = 293 "Fluid temperature";
parameter Real proportionUndissolvedAir = 0.001 "Proportion of undissolved air";
parameter Real polytropicExponent = 1.1 "Polytropic exponent";
HydraulicsByFluidon.Interfaces.FluidPort fluidPort "Hydraulic port"
annotation (Placement(transformation(extent = {
{100, -10},
{120, 10}})));
equation
fluidPort.fluidId = Integer(fluidType);
fluidPort.mFlow = 0;
fluidPort.fluidTemperature = fluidTemperature;
fluidPort.polytropicExponent = polytropicExponent;
fluidPort.proportionUndissolvedAir = proportionUndissolvedAir;
annotation (
Icon(
coordinateSystem(
preserveAspectRatio = true,
extent = {
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graphics = {
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Documentation(info = "<html>\n <p>\n Model of a hydraulic liquid. The model provides the other components (e.g. pipes) with temperature- and pressure-dependent fluid properties. In order for the fluid properties to reach the other components, the liquid model must be connected to the hydraulic circuit.\n </p>\n <p>\n The user can choose between the following liquids:\n <ul>\n <li><a href=\"modelica://HydraulicsByFluidon.Media.HLP32\">HLP 32</a></li>\n <li><a href=\"modelica://HydraulicsByFluidon.Media.HLP46\">HLP 46</a></li>\n <li><a href=\"modelica://HydraulicsByFluidon.Media.Oil5W30\">Oil 5W30</a></li>\n <li><a href=\"modelica://HydraulicsByFluidon.Media.PentosinCHF11S\">Pentosin CHF 11S</a></li>\n <li><a href=\"modelica://HydraulicsByFluidon.Media.Skydrol5\">Skydrol 5</a></li>\n <li><a href=\"modelica://HydraulicsByFluidon.Media.Water\">Water</a></li>\n </ul>\n The model provides the following fluid properties as functions of pressure and temperature:\n <ul>\n <li>Density</li>\n <li>Kinematic viscosity</li>\n <li>Dynamic viscosity</li>\n <li>Isothermal bulk modulus</li>\n <li>Isentropic bulk modulus</li>\n <li>Speed of sound</li>\n <li>Specific heat at constant pressure</li>\n <li>Isobaric thermal expansion coefficient</li>\n <li>Thermal conductivity</li>\n </ul>\n As an example, the following diagram shows the variation of density with pressure and temperature for water.\n </p>\n <p>\n <center><img src=\"modelica://HydraulicsByFluidon/Resources/Images/Media/Liquid/LiquidDensity.png\" width=\"350\"></center>\n </p>\n <p>\n Due to the used mathematical approach, the fluid properties are only valid within a limited range of temperatures and pressures. If the deviations from the actual fluid properties are too large, the custom fluid can be used.\n </p>\n <p>\n If the effects of undissolved air are to be considered during the simulation, the user can provide the fraction of undissolved air at ambient pressure through the parameter <var>Proportion of undissolved air</var>. The stiffness of the gas bubbles is calculated based on the parameter <var>Polytropic exponent</var> which can assume values between 1.0 (isothermal change of state, slow compression/expansion) and 1.4 (isentropic change of state, fast compression/expansion).\n </p></html>"));
end Liquid;