PDM Analysis SCORG 5.1 SCORGTM is specialised software for the design and analysis of screw compressors, pumps and motors. It offers unique capability to evaluate the performance and operation of these machines by use of Computational Fluid Dynamics of Thermodynamic Multi Chamber Model. It is designed to minimise efforts and maximise efficiency of the design process by enabling geometry analysis, preliminary thermodynamic evaluation and grid generation of the large number of positive displacement rotary machines with multiple rotor arrangements. It can be used for the design, grid generation and analysis of variety of machines including: Screw compressors with two or more rotors, Single phase and multiphase screw pumps with two and more rotors, Single phase and multiphase screw motors with two or more rotors, Roots Blowers Hook and Claw Compressors, pumps and motors Gear pumps and G-pumps Progressive Cavity pumps Rotary screw extruders The user friendly and easy to use Graphical User Interface (GUI) provides enjoyable working environment for users. Users can import existing geometry of the rotors from data point files obtained analytically, numerically, by measurement or from a CAD system. Rotors could be manipulated, scaled and modified. GUI is capable of presenting results graphically and textually. SCORGTM generates numerical mesh and pre-processing scripts for direct link and easy connection with most of commercial CFD solvers and Engineering software including PumpLinx®, Ansys CFX and StarCCM+. Furthermore, SCORGTM allows geometric analysis of flow features and preliminary performance analysis using multi-domain chamber model. Thermodynamic results are used for initial conditions for CFD, Structural Analysis by Finite Element Methods (FEM) or Fluid solid interaction (FSI)