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access gamma (specific heat capcity ratio)

#2439  Permalink Top

access gamma (specific heat capcity ratio)

Jun-18-12 20:05:19

Hi everyone:

I am wondering how can I access the gamma (ratio of heat capacity) for water using Modelica.Media? Can somebody give me an example of the syntax? I am attaching a pseudo-code of what I am trying to achieve?

Thanks
JG

Code:

model test1

  replaceable package Medium = Modelica.Media.Water.StandardWater constrainedby 

    Modelica.Media.Interfaces.PartialMedium "Medium model";

Modelica.SIunits.RatioOfSpecificHeatCapacities gamma ;



 Modelica.Fluid.Interfaces.FluidPort_a port_a(   redeclare package Medium = Medium,   m_flow(min=if allowFlowReversal then -Constants.inf else 0)) 



 Modelica.Fluid.Interfaces.FluidPort_b port_b(    redeclare package Medium = Medium,    m_flow(min=if allowFlowReversal then -Constants.inf else 0)) 



.....



equation

gamma=Medium.isentropicExponent(port_a.ThermodynamicState)  //??????????????????

......

end test1

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