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Contact Information


Visit Sham Rane

CG41, Desk 114, Tait Building

Postal Address

City, University of London
Northampton Square
United Kingdom



Dr Sham Rane graduated in Mechanical Engineering from the University of Pune. He then worked as a manufacturing engineer at Forbes Marshall India Pvt. Ltd. where he worked on boiler fabrication, oil fired burner prototyping and testing, steam engineering and process plant engineering. He continued his education at Indian Institute of Technology Delhi in the Mechanical Engineering department with specialization in Design of Mechanical Equipment.

In 2008, Dr Rane joined the computational fluid dynamics department of ANSYS FLUENT India Ltd. and worked as an application engineer for FLUENT and CFX codes. At ANSYS, he has worked on customized UDF development, Multiphysics code coupling between Fluids and Electromagnetic solvers and development of grids.

In 2011, he moved to London and joined City University’s Centre for Compressor Technology for his PhD research. Here he works extensively on deforming grid generation for twin screw compressors. He investigates non-classical rotor designs like variable lead and variable profile using CFD analysis.

In 2014, Dr Rane completed his thesis and was appointed as a Research Fellow at the centre to carry further developments in CFD analysis in positive displacement machines. Recently he has been working on analysis of multiphase flows in twin screw compressors such as water spray and oil injected designs. He has also been working on extension of the CFD modelling to oil injected and ORC application rotary vane compressors and expanders.

Dr Rane has been involved in development and commercialization of the grid generation technology at the centre and works actively in software development which is available as SCORG tool via PDM Analysis Ltd., UK for industrial and academic research.


PhD. Mechanical Engineering, City University London, UK, 2014

MTech. Mechanical Engineering, Indian Institute of Technology Delhi, India, 2008

BEng. Mechanical Engineering, University of Pune, India, 2004


2014 – to date, City University London, Research Fellow in Compressor Technology

2011 – 2014, City University London, PhD Researcher

2008 – 2011, ANSYS FLUENT India Ltd., Application Engineer in Computational Fluid Dynamics

2004 – 2006, Forbes Marshall India Ltd., Manufacturing Engineer


Dr Sham Rane does research on computational modelling of flow in positive displacement machines such as twin screw compressors and expanders. His has worked on development of deformation grid generation of non-classical rotor geometries like variable lead and variable profile screw rotors.

Variable Lead Rotors

Variable Lead Rotors

His recent work on improving deforming meshes has been applied for oil injected twin screw compressor analysis in the industry and research. A fellow researcher at the centre has used the same grid technology for twin screw pump analysis and investigation of cavitation in these machines. The research work has attracted attention from other positive displacement machine developers and a recent extension of the model was done in the ORC application of vane expanders and compressors.

CFD Screw Compressor

Research Interests

- CFD analysis of industrial applications
- Grid generation
- Deforming Meshes and application to Positive Displacement Machines
- Screw Compressors and Expanders
- Application of CFD and Multiphysics simulations to Screw Machines


Conference papers and proceedings (11)

  1. Rane, , kovacevic, A. and stosic, N. (2016). CFD Analysis of Oil Flooded Twin Screw Compressors. 23rd International Compressor Engineering Conference 11-14 July, Purdue University, USA.
  2. Bianchi, G., Rane, , Kovacevic, , Cipollone, R., Murgia, S. and Contaldi, G. (2016). Development of a general numerical methodology for CFD analyses in sliding vane machines and application on a mid-size oil injected air compressor. 23rd International Compressor Engineering Conference 11-14 July, Purdue University USA.
  3. Stosic, N., Rane, S., Kovacevic, A. and Smith, I.K. (2016). Screw rotor profiles of variable lead vacuum and multiphase machines and their calculation models.
  4. Rane, S., kovacevic, A., Stosic, N., Jiang, Y., Furmanczyk, M. and Lowry, S. (2014). Influence of approaches in CFD Solvers on Performance Prediction in Screw Compressors. 22nd International Compressor Engineering Conference 14-17 July, Purdue University USA.
  5. Arjeneh, M., Kovacevic, , Rane, , Stosic, and Gavaises, M. (2014). Study of Multiphase Flow at the Suction of Screw Compressor. 22nd International Compressor Engineering Conference 14-17 July, Purdue University USA.
  6. Kovacevic, A., Rane, S. and Stosic, N. (2014). Screw compressor with variable geometry rotors - analysis of designs by CFD.
  7. Rane, S., Stosic, N. and Dhunput, A. (2014). Prediction of heat transfer and visualisation of temperature field in screw compressors.
  8. Kovacevic, A., Rane, S. and Stosic, N. (2014). Screw compressor with variable geometry rotors - Analysis of designs by CFD.
  9. Kovacevic, A. and Rane, S. (2013). 3D CFD analysis of a twin screw expander.
  10. Rane, S., Kovacevic, A., Stosic, N. and Kethidi, M. (2013). CFD grid generation and analysis of screw compressor with variable geometry rotors.
  11. Rane, , Kovacevic, A. and Kethidi, M. (2012). CFD Modeling in Screw Compressors with complex multi rotor configurations. 21st International Compressor Engineering Conference 16-19 July, Purdue University USA.

Journal articles (11)

  1. Yan, D., Kovacevic, A., Tang, Q., Rane, S. and Zhang, W. (2017). Numerical modelling of twin-screw pumps based on computational fluid dynamics. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 231(24), pp. 4617–4634. doi:10.1177/0954406216670684.
  2. kovacevic, A. and Rane, S. (2017). Algebraic generation of single domain computational grid for twin screw machines. Part II. Validation. Advances in Engineering Software, 109, pp. 31–43. doi:10.1016/j.advengsoft.2017.03.001.
  3. Bianchi, G., Rane, S., Kovacevic, A. and Cipollone, R. (2017). Deforming grid generation for numerical simulations of fluid dynamics in sliding vane rotary machines. Advances in Engineering Software, 112, pp. 180–191. doi:10.1016/j.advengsoft.2017.05.010.
  4. Rane, S. and Kovacevic, A. (2017). Algebraic generation of single domain computational grid for twin screw machines. Part I. Implementation. Advances in Engineering Software, 107, pp. 38–50. doi:10.1016/j.advengsoft.2017.02.003.
  5. Yan, D., Tang, Q., Kovacevic, A., Rane, S. and Pei, L. (2017). Rotor profile design and numerical analysis of 2–3 type multiphase twin-screw pumps. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering pp. 1–17. doi:10.1177/0954408917691798.
  6. Bianchi, G., Rane, S., Kovacevic, A., Cipollone, R., Murgia, S. and Contaldi, G. (2017). Numerical CFD simulations on a small-scale ORC expander using a customized grid generation methodology. Energy Procedia, 129, pp. 843–850. doi:10.1016/j.egypro.2017.09.199.
  7. Rane, S., Kovačević, A. and Stošić, N. (2015). Analytical Grid Generation for accurate representation of clearances in CFD for Screw Machines. IOP Conference Series: Materials Science and Engineering, 90(1). doi:10.1088/1757-899X/90/1/012008.
  8. Arjeneh, M., Kovacevic, A., Rane, S., Manolis, M. and Stosic, N. (2015). Numerical and Experimental Investigation of Pressure Losses at Suction of a Twin Screw Compressor. IOP Conference Series: Materials Science and Engineering, 90(1). doi:10.1088/1757-899X/90/1/012006.
  9. Rane, S., Kovacevic, A., Stosic, N. and Kethidi, M. (2014). Deforming grid generation and CFD analysis of variable geometry screw compressors. Computers and Fluids, 99, pp. 124–141. doi:10.1016/j.compfluid.2014.04.024.
  10. Rane, S., Kovacevic, A., Stosic, N. and Kethidi, M. (2013). Grid deformation strategies for CFD analysis of screw compressors. International Journal of Refrigeration, 36(7), pp. 1883–1893. doi:10.1016/j.ijrefrig.2013.04.008.
  11. Chukanova, E., Stosic, N., Kovacevic, A. and Rane, S. (2012). Identification and quantification of start up process in oil flooded screw compressors. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), 6(PARTS A AND B), pp. 81–88. doi:10.1115/IMECE2012-86497.


  1. Rane, Grid Generation and CFD Analysis of Variable Geometry Screw Machines. (PhD Thesis)


EPM767 - Screw Compressor Design

Recent advances in computer modelling of compressor working processes have made it possible to predict compressor performance far more accurately than by traditional methods based on simplified calculations. Moreover, the speed at which such calculations can then be performed permits the effect of variation of the principal design parameters on performance to be reliably estimated. It is thereby possible to produce fully optimized designs for any specific duty with the minimum amount of change during the development programme. By use of a CAD system, results of such calculations can be transferred directly to the production of working drawings. The course covers only the basics of Positive Displacement Compressors and some more details of the two main types of these compressors currently in use in the air compression and refrigeration industries, namely the screw and scroll.
The core course syllabus consists of full details screw compressor models including descriptions of geometric models of screw compressors, models of the thermo-fluids processes of admission, compression and discharge, including leakage and fluid injection, pressure load calculations, performance analysis and parametric studies.
The course consists of lectures, discussion and laboratory classes, handouts and model software and participants will be given the opportunity to carry out hands on design studies under the direction of the course tutors, using the software supplied.

Other Activities

Events/conferences (2)

  1. 10th International Conference on Compressors and their Systems 2017. City University London (2017).
    Description: As a result of the success of the 9th London International Compressor Conference the 10th in this series will be extended to cover three full days. As in the 9th conference, the programme will include a full session dedicated to industrial issues of a non-technical nature, in addition to the traditional keynote addresses, research and technical papers, podium papers and discussions.

    Featuring participation by manufacturers of compressors, expanders and systems and control systems, equipment suppliers, users and research organisations. This conference provides a forum where developments in air, gas and refrigeration compressors, vacuum pumps, expanders, related systems and components
    can be presented for discussion.
  2. Short Course on Computational Fluid Dynamics in Rotary Positive Displacement Machines. City University London (2017).
    Description: 3rd CFD Short Course

    Following the success of two previous forums/short-courses, on CFD in Positive Displacement Machines (PDM), in which there was strong participation from the compressor industry, CFD software providers and academia, the third event is dedicated to advanced topics in the application of CFD to PDM for industrial use and research. Topics to be covered include: grid generation, advances in CFD methods, multiphase and turbulence modelling, validation of CFD predictions, CAD integration and Industrial applications.

    It was concluded from the results of the first two forums, that to increase the understanding of flow in compressors the following aspects of CFD in compressors need to be investigated further:
    1) Accurate prediction and sensitivity of clearance size variation during operation on the leakage flow through the machines.
    2) How modern CFD tools could be used to predict variation in gap size.
    3) Stability and accuracy of Multiphase flow calculations in 3D simulations of compressors.

    Participants from industry and academia are encouraged to present their research and analysis to the forum during the short-course. As with the 2nd short-course, laboratory, a dry air screw compressor test results are available to aid the above investigations. Talks covering theoretical aspects, as well as practical applications, will be presented at the short-course and attendees will benefit by getting an insight into the current state of the art.

    The Forum/Short Course will be held at the Northampton Square site of City University of London prior to the 10th Conference on Compressors and their Systems on Saturday 9th and Sunday 10th September 2017.