This model represents a pipe model with convection. The component is modeled using the following partial models: SmartCooling.Interfaces.TwoPort and SmartCooling.Interfaces.PressureLoss. The supply of the heat flow rate from outside can be done through heatPort_a or through heatPort_b. The connector heatPort_a represents the connection directly to the medium and the connector heatPort_b represents the link to the inner pipe surface, respectively. Between these two heatPorts the convection happens according to the thermal equation for convection in a pipeline [1].

Figure 1, Relation between the Nusselt number of a medium in a component and the Reynolds number.

The relation of the Nusselt number of a medium in a component and the Reynolds number is calculated to determine the convective thermal conductance of the medium using the pipe geometry as shown in figure 1. The effects of laminar, transient and turbulent areas are considered in the calculation of the Nusselt number.

References

[1] VDI-Heat Atlas, Second Edition , Verlag Springer , 2010, ISBN 978-3-540-77876-9, G1, pages 693 ff.