.Modelica.Fluid.Dissipation.Utilities.Types.GeometryOfInternalFlow .Modelica.Fluid.Dissipation.Utilities.Types.GeometryOfInternalFlowtype GeometryOfInternalFlow = enumeration(Annular "Annular geometry", Circular "Circular geometry", Elliptical "Elliptical geometry", Rectangular "Rectangular geometry", Isosceles "Isosceles triangular geometry");