.FreeFluids.Pipes.PipeFlowBase

Information

It is the base model for flow, and heat transfer, in pipes. The flow may be reversible, dispite it is against the Modelica requirements when using input and output variables.

It contains the momentum and energy conservation equations, with two missing variables: the pressure drop and the exchanged heat. The last only in the case of a detailed heat transfer model. It is important to take care of the parameter isCompressibleFlow, as it will determine the equations to use.

For the physical pipe the length, perimeter and section are treated as variables. The user can choose to take them from parameters or must supply extra equations for their calculation.

There is one missing equations for the calculation of the total mass inside the tube (MassProductTotal).

Regarding flow: the connectors must supply two variables (from PortA.P, PortB.P and massic flow). An equation is missing for the calculation of the pressure loss by friction.

Regarding energy: Only if the thermalType parameter is set to detailed, an extra equation is needed in order to calculate the heat transfer. But you can choose isenthalpic, adiabatic, isothermal, fixed power, or fixed temperature change behaviours.

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