.OpenHydraulics.Components.Lines.Line .OpenHydraulics.Components.Lines.LineSimple pipe model consisting of one volume, wall friction (with different friction correlations) and gravity effect. This model is mostly used to demonstrate how to build up more detailed models from the basic components. Note, if the "thermalPort" is not connected, then the pipe is totally insulated (= no thermal flow from the fluid to the pipe wall/environment).