model ExpansionContraction "Sudden Expansion / Contraction"
import SI = Modelica.SIunits;
parameter SI.Length D1(displayUnit = "mm") = 0.016 "Diameter 1";
parameter SI.Length D2(displayUnit = "mm") = 0.05 "Diameter 2";
parameter SI.Volume deadVolume(final min = 1e-9, displayUnit = "l") = 1e-6 "Dead volume at ports";
HydraulicsByFluidon.Components.Lines.Base.SimpleExpansionContraction simpleExpansionContaction(forwardFluidProperties = false, D1 = D1, D2 = D2) annotation (Placement(
visible = true,
transformation(
origin = {0, 0},
extent = {
{-12, -10},
{12, 10}},
rotation = 0)));
HydraulicsByFluidon.Components.Volumes.Volume volumeB(capacity = deadVolume) annotation (Placement(
visible = true,
transformation(
origin = {0, 70},
extent = {
{-10, -10},
{10, 10}},
rotation = 0)));
HydraulicsByFluidon.Components.Volumes.Volume volumeA(capacity = deadVolume) annotation (Placement(
visible = true,
transformation(
origin = {0, -70},
extent = {
{-10, -10},
{10, 10}},
rotation = 0)));
extends HydraulicsByFluidon.Components.Base.HydTwoPortVerticalExt;
equation
connect(fluidPortA,volumeA.fluidPort) annotation (Line(
points = {
{0, -100},
{0, -70}},
color = {0, 93, 152}));
connect(volumeA.fluidPort,simpleExpansionContaction.fluidPortA) annotation (Line(
points = {
{0, -70},
{0, -10}},
color = {0, 93, 152}));
connect(volumeB.fluidPort,fluidPortB) annotation (Line(
points = {
{0, 70},
{0, 100}},
color = {0, 93, 152}));
connect(simpleExpansionContaction.fluidPortB,volumeB.fluidPort) annotation (Line(
points = {
{0, 10},
{0, 70}},
color = {0, 93, 152}));
annotation (
Icon(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Rectangle(extent = {
{-30, -90},
{30, 0}}),
Rectangle(extent = {
{-50, 90},
{50, 0}}),
Text(
origin = {0, -68},
lineColor = {0, 0, 255},
fillColor = {0, 0, 255},
extent = {
{-78, -20},
{78, 20}},
textString = "1"),
Text(
origin = {0, 68},
lineColor = {0, 0, 255},
fillColor = {0, 0, 255},
extent = {
{-78, -20},
{78, 20}},
textString = "2")}),
Documentation(info = "<html>\n <p>\n The component ExpansionContraction is a model of a cross section enlargement (diffusor) or a cross section reduction (nozzle). It\n depends on the flow direction.\n </p>\n <p>\n The component computes the loss number zeta\n </p>\n <p>\n <center><img align=\"middle\" src=\"modelica://HydraulicsByFluidon/Resources/Images/Components/Resistors/Zeta.png\"></center>\n </p>\n <p>\n according to the following equations:\n </p>\n <p>\n <center><img align=\"middle\" src=\"modelica://HydraulicsByFluidon/Resources/Images/Components/Lines/ExpansionContractionExpansion.png\"></center>\n </p>\n <p>\n Borda-Carnot Equation\n </p>\n <p>\n <center><img align=\"middle\" src=\"modelica://HydraulicsByFluidon/Resources/Images/Components/Lines/ExpansionContractionZetaExpansion.png\"></center>\n </p>\n <p>\n <center><img align=\"middle\" src=\"modelica://HydraulicsByFluidon/Resources/Images/Components/Lines/ExpansionContractionContraction.png\"></center>\n </p>\n <p>\n <center><img align=\"middle\" src=\"modelica://HydraulicsByFluidon/Resources/Images/Components/Lines/ExpansionContractionBeta.png\"></center>\n <center><img align=\"middle\" src=\"modelica://HydraulicsByFluidon/Resources/Images/Components/Lines/ExpansionContractionMy.png\"></center>\n <center><img align=\"middle\" src=\"modelica://HydraulicsByFluidon/Resources/Images/Components/Lines/ExpansionContractionZetaContraction.png\"></center>\n </p>\n <p>\n Formulas are taken from E. Truckenbrodt, Fluidmechanik, Band 1: Grundlagen und elementare Strömungsvorgänge dichtebeständiger Fluide, 4. Auflage, 2008.\n </p></html>"));
end ExpansionContraction;