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  1. Home
  2. …
  3. September
  4. 12th International Conference on Compressors and their Systems
  5. Short Course and Forum
12th International Conference on Compressors and their Systems
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Panoramic of the Thames at night, with the Shard building central and light reflections on the river.

Short Course and Forum

5th Short Course & Forum on Computational Fluid Dynamics in Rotary Positive Displacement Machines

4th and 5th September 2021

About the Short Course

Since 2013, the Centre for Compressor Technology at City, University of London has organised very successful forums/short-courses on CFD in Positive Displacement Machines (PDM).

These typically contain a strong input from the compressor industry, CFD software providers and academia. Our fifth event in the series is dedicated to new methods and advanced topics in the application of chamber models, 3D CFD and experimental techniques in PDM such as:

  • Advances in grid generation, CFD tools, Open source CFD solvers and new techniques for PD machine analysis.
  • Applicability of new CFD methods such as Lattice Boltzmann Methods, Smoothed particle hydrodynamics, Mesh free algorithms.
  • Modelling leakage flows, conjugate heat transfer, stability and accuracy of Multiphase flow calculations.
  • Prediction of clearance gap sizes during operation and application of modern FSI computations
  • Advances in chamber modelling and hybrid 1D – 3D CFD coupled approaches.
  • Experimental techniques for analysis of PDM.

Who should participate

Participants from industry and academia are invited to present results of their research and analysis in the forum. To aid the research further; the forum will provide test results of dry air and oil injected twin screw compressors, a roots-blower, a dry air single screw expander and an ORC vane expander data for benchmark studies.

This short course/forum will bring benefits to engineers, engineering managers and specialists from industry, students, researchers and educators from academia and anyone who is interested in the modelling and design of rotary positive displacement machines.

It will be presented by leading scientists and researchers from industry and academia and will give an insight into new technologies and the state of the art in the modelling PDM.

Short course programme

Saturday 4th September 2021

09.00 Welcome and Introduction - Prof Ahmed Kovacevic

Session One

09:15 Introduction to CFD analysis in positive displacement machines using FVM - Professor Hrvoje Jasak,University of Cambridge, UK

  • Fundamental governing equations
  • CFD modelling techniques
  • Deforming grids, Fluid-Structure Interaction

10:30 Coffee Break


Session Two: CFD and Grid generation for Screw Machines

Chair: TBC

10:45 Advances in Screw Machines technology - Prof Ahmed Kovacevic, City, University of London, UK

  • SECRET Project and Developments in CHT and Leakage flow – Experimental and Numerical
  • Historical perspective of CFD analysis of Twin Screw Machines
  • State-of-the-art Grid generation techniques
  • Lower order performance prediction models

11:45 Deforming Grid and Modelling in Twin Screw Machines - Dr Sham Rane, City, University of London, UK

  • New developments in Screw Machine grid generation using Elliptic PDE solver
  • Grid Generation for variety of twin screw machines
  • CHT and FEM-FVM Solver coupling

12:30 Lunch Break


Session Three: Developments in Numerical Aspects and Modelling

Chair: TBC

14:00 Screw Machine Integrated models – SCORG & GT Suite GT Suite

Mr Jonathan Harrison, Mr Jon Zenker, Mr Gautham Ramchandran, Gamma Technologies, USA

  • Governing theory and solver technology
  • Applications of Compressor and Expander modelling
  • Optimisation and New developments

14:45 Flow modelling of oil-flooded screw compressors using a cut-cell based mesh with adaptive refinement - Dr David Rowinski, Convergent Science Inc., USA

  • Oil-flooded screw compressor test case
  • Multiphase, Gap flow modelling
  • Solver configuration, Pre/Post processing

15:30 Modelling Conjugate Heat Transfer in PD Compressors with Simerics-MP+ - Dr Hui Ding, Simerics Inc.,USA

  • New Developments
  • Modelling Conjugate Heat Transfer in PD Compressors with Simerics-MP+

16:15 Coffee Break


16:30 Discussion 1 - Forum

Chair: A. Kovacevic

17:30: Close of Day One

Sunday 5th September 2021

Session Four: Keynote on CFD and FSI

Chair: TBC

09:30 OpenFOAM CFD solver for Large Deformation FSI - Prof Zeljko Tukovic, University of Zagreb, Croatia

  • FSI solver in OpenFOAM
  • CFD implementation and numerical aspects
  • Applications

10:45 Coffee Break


Session Five: Modelling of Vane Machines

Chair: TBC

11:00 Analytical grid generation methodology and CFD simulations on sliding vane machines - Dr Giuseppe Bianchi, Mr Fanghua Ye, Brunel University London, UK

  • CFD simulations in rotary vane machines
  • Analytical grid generation for non-circular housing and blade-offset arrangement for both single-acting and double-acting machines
  • ASNSYS Fluent solver validation of the CFD simulations is an ORC expander and energy recovery device for desalination

12:00 Lunch Break


Session Six: Modelling flows in rotary machines – Industrial Applications

Chair: TBC

13:30 CFD Analysis and ANSYS solutions for Positive Displacement Machines - Mr Bill Holmes, ANSYS Inc. Canada

  • ANSYS CFX and FLUENT methodology
  • ANSYS Forte methodology
  • Gap flow modelling

Test cases and other application examples

14:15 Open source analysis and design of PD machines - Mr Nicola Casari, Ettore Fadiga, Pinelli Michele, University of Ferrara, Italy, Dr Davide Ziviani, Purdue University, USA

  • PD simulation techniques in OF.SCORG coupling with OF and CFD analysis of Twin-screw machines.
  • Scroll meshing strategy and implementation in OF.
  • CFD simulation of Scroll machines.
  • CFD integration in 1D tool for the support in the design.
  • PDSim Description and OF integration.
  • PDSim vs CFD result comparison.

15:15 Coffee Break


Session 7: Advanced topics related to CFD analysis

Chair: TBC

15:30 Experimental techniques to study heat transfer and flow field in clearances of positive displacement machines - Mr Brijeshkumar Patel, City, University of London, UK

  • Planar Laser-Induced Fluorescence (PLIF) to visualize the temperature field.
  • Flow in optical roots blower by phase-locked PIV, Vortex distribution, CFD flow validation.
  • Physics of heat transfer and flow dynamics in the clearance gaps

16:15 Numerical study of different type of customised mesh for twin screw vacuum pumps - Mr Yang Lu, City, University of London, UK

  • Algorithms, Application to Twin Screw Rotor
  • Vacuum pumps
  • Low vi Screw Compressors and CFD analysis

17:00 Coffee Break


17:15 Discussion 2 - Forum

Chair: A. Kovacevic

18:15 Close of the Short course

18:30 Reception for 12th International Conference on Compressors and their Systems

Contact details

  • Dominique Spence-Polin

    Conference Secretary

    +44 (0)20 7040 3331

    compressors@city.ac.uk

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