Hello

I am beginner on openmodelica and I want to model a simple system in transient:

pressure source --> valve (with kv coefficient) --> pipe --> closedvolume.

This model is composed only hydrogen gas with very high pressure (between 100 and 700bar)
I build my model step by step.

When I run my model, I have problem inside my valve and I don't understand why.

following it's my little model

model valve_cas

  replaceable package Medium =
      Modelica.Media.Incompressible.Examples.Glycol47
    constrainedby Modelica.Media.Interfaces.PartialMedium;
   
  inner Modelica.Fluid.System system(T_ambient(displayUnit = "K") = -15, energyDynamics = Modelica.Fluid.Types.Dynamics.FixedInitial) 
  annotation(
    Placement(visible = true, transformation(origin = {-160, 76}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
    Modelica.Fluid.Sources.FixedBoundary boundary(
    redeclare package Medium = Medium, T = Modelica.SIunits.Conversions.from_degC(-15), p = 2000000, use_p = true) 
    annotation(
    Placement(visible = true, transformation(origin = {-64, -26}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  Modelica.Fluid.Vessels.ClosedVolume reservoir(
    redeclare package Medium = Medium,V = 0.35, massDynamics = Modelica.Fluid.Types.Dynamics.FixedInitial, nPorts = 1, p_start = system.p_ambient, use_HeatTransfer = false, use_portsData = false) 
    annotation(
    Placement(visible = true, transformation(origin = {130, 20}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  Modelica.Fluid.Valves.ValveIncompressible valveIncompressible(
    redeclare package Medium = Medium,CvData = Modelica.Fluid.Types.CvTypes.Kv, Kv = 0.11, allowFlowReversal = false, checkValve = false, dp(displayUnit = "Pa", start = 10), dp_nominal(displayUnit = "Pa") = 1e6, m_flow_nominal = 0.04579, opening_nominal = 1, show_T = false) 
    annotation(
    Placement(visible = true, transformation(origin = {28, -14}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
Modelica.Fluid.Pipes.DynamicPipe pipe(
    redeclare package Medium = Medium,
  allowFlowReversal = false,diameter = 0.005, length = 1)  annotation(
    Placement(visible = true, transformation(origin = {86, -16}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
equation
  connect(boundary.ports[1], valveIncompressible.port_a) annotation(
    Line(points = {{-54, -26}, {-15, -26}, {-15, -14}, {18, -14}}, color = {0, 127, 255}));
  connect(valveIncompressible.port_b, pipe.port_a) annotation(
    Line(points = {{38, -14}, {52, -14}, {52, -16}, {76, -16}}, color = {0, 127, 255}));
  connect(pipe.port_b, reservoir.ports[1]) annotation(
    Line(points = {{96, -16}, {130, -16}, {130, 10}}, color = {0, 127, 255}));
  annotation(
    Diagram(coordinateSystem(extent = {{-200, -100}, {200, 100}})),
    Icon(coordinateSystem(extent = {{-200, -100}, {200, 100}})),
    version = "",
    uses(Modelica(version = "3.2.3")));
end valve_cas;