modelSimpleStream

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Example of a simple pneumatic pipe network, including splitter, junction and heat transfer, driven by a constant pressure difference.

This examples demonstrates:

• the mass flow rate dynamics, that are influenced by the inertia of the fluid in the pipes. The Thermofluid Stream Library considers this by the inertance L. For a pipe the inertance L = l/A
• the temperature dynamics of the heatCapacitor and the thermalConduction model. The dynamics are influenced by the heat capacities C and V*rho*c respectively and by the overall thermal conductance U*A

Note:

• the splitter, junction and thermalConduction models are ideal, i.e. they consider no pressure losses
• the pressures, e.g. pipe1.outlet.state.p and pipe2.outlet.state.p are steady state pressures, and are not required to be equal at junctions or equal to the boundary condition of a sink or a volume.
  Junctions, sinks and volumes balance the sum of steady state pressure p and pressure difference due to the acceleration of mass (the so called inertial pressure) r however, i.e. their sum p+r is equal for every inlet of a junction or equal to the boundary condition of a sink or a volume.

Owner: Michael Meißner

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