function DragCoeff import Modelica.Math.exp "Exponential function"; input Boolean toggleStaggered; input SI.ReynoldsNumber Re; input Real a; input Real b; input Real c; input Real f_zL; input Real f_zt; input Real df_zL_dm_flow; input Real df_zt_dm_flow; input Real aux1; output Real epsilon; output Real depsilon_dm_flow; end DragCoeff;