ReynoldsNumberCalculation of Reynolds number  | 
     | 
| A_cross | 
         Type: Area (m²) Description: Cross sectional area  | 
    
|---|---|
| perimeter | 
         Type: Length (m) Description: Wetted perimeter  | 
    
| rho | 
         Type: Density (kg/m³) Description: Density of fluid  | 
    
| eta | 
         Type: DynamicViscosity (Pa·s) Description: Dynamic viscosity of fluid  | 
    
| m_flow | 
         Type: MassFlowRate (kg/s) Description: Mass flow rate  | 
    
| Re | 
         Type: ReynoldsNumber Description: Reynolds number  | 
    
|---|---|
| velocity | 
         Type: Velocity (m/s) Description: Mean velocity  |