NEWS Overview













 MAY 2018 - Salome_CFD User Meeting in Manchester

Since 2007 EDF R&D has successfully hosted Code_Saturne User Meetings in France, this year, for the first time ever, a user meeting will be held in the UK. On the 5th and 6th of June EDF R&D, EDF Energy and Renuda will host the inaugural Salome_CFD User Meeting at the University of Manchester. The User Meeting provides a platform for the Code_Saturne development team to present the latest upgrades and future direction of the code and industrial and academic leader the chance to present their latest projects. Over and above the informative presentations it gives the Code_Saturne community the opportunity to share ideas and discuss its work.

Not only is this the inaugural UK User Meeting, it is the very first time that the second day has been set aside for two free training courses. Course participants can choose between basic, practical training with Salome_CFD or a free-form advanced course. Anyone new to CFD, or first-time Salome_CFD users, will be introduced to the code through a practical exercise using the Salome CAE platform and Code_Saturne CFD solver, from building a CAD model to performing simulations and analysing them using the Paravis module. Advanced users will be given an insight into Code_Saturne's Fire Modelling functionalities and have an opportunity to discuss specific projects with Code_Saturne developers and experts.

To register or for more information on the User Meeting and training please contact Robert Hillhouse.



 MARCH 2018 - Code_Saturne User Meeting 2018

The 2018 Code_Saturne User Meeting will take place at the EDF Lab in Saclay France on the 5th and 6th of April. Day one gives EDF R&D a platform to update users from around the world on improvements and upgrades to the open source code, it then affords users the opportunity to showcase their projects. The success of previous User Meetings can be attributed to the quality and diversity of the projects which highlights Code_Saturne's versatility, and this year will be no different with thirteen different projects being presented.

For the first time EDF R&D has added a second day to the meeting which is dedicated to learning more about the multiphase flow solver NEPTUNE_CFD.

The two days set aside for the meeting gives users and EDF R&D developers a chance to share ideas to improve the open source code and solver. 


 NOVEMBER 2017 - Renuda presents at the inaugural UK Fire and Smoke Modelling Forum

Modelling is increasingly used as a tool in fire safety design and, as there is currently no forum in the UK where practitioners, researchers and AHJs have the opportuninty to discuss matters relating specifically to fire, the inaugural UK Fire and Smoke Modelling Forum ( was held on the 3rd of November in London. EDF R&D was invited to participate in the forum and share their progress in fire modelling. Bertrand Sapa and Martin Ferrand, two men instrumental in the development of Code_Saturne's combustion model, were unable to attend the forum and as a result Renuda presented on their behalf. Nicolas Tonello presented Code_Saturne's combustion model and its fire modelling capabilities, EDF's approach to modelling, methodology, examples of industrial studies and planned work into the next decade.

Encouraged by the success of the first forum, organisers are aiming to arrange biannual forums and workshops.    

For a copy of the presentation please contact


 OCTOBER 2017 - Renuda presents at the 17th IAHR conference in Lyon

On the 17th of October Renuda presented a paper, co-authored with Martin Ferrand and Yvan Fournier from EDF R&D, on the work currently under way to implement a new cooling tower module in the open source solver Code_Saturne at the 17th IAHR Conference in Lyon. The International IAHR Conference on Cooling Tower and Air Cooled Heat Exchangers, held every two years, was organised this year by EDF. The conference is an opportunity for industry experts to share ideas on new projects or commissioning, design methods, performance assessments, environmental issues and innovations.

Numerical tools are used to design cooling towers or to evaluate the impact of systems modifications through retrofitting or degradation. However, due to the complexity of the physical phenomena involved and the dimensions of the systems, numerical modelling of draft cooling towers in three dimensions represents a significant challenge. The ongoing work to implement a new cooling tower module in Code_Saturne’s version 5.0, aims to obtain significant accuracy and yet limit the number of flow equations which must be solved, the multiphase flow has been cast into the flow of liquid water and humid air using the drift flux model. The cooling tower model and preliminary verifications on a realistic 2D tower case were presented and extensions of the framework and validation against experimental data discussed.

For more information on this paper please contact


 OCTOBER 2017 - London based open source CFD training in November

Renuda will be holding another two day open source CFD training course on the 21st and 22nd of November in London.

This practical course, which focuses on CFD processes and recommended practices required to perform good CFD analysis from CAD to visualisation, is based around Code_Saturne and the suite of pre and post-processing tools SALOME and ParaView.

The course is aimed at professionals; academics; students; engineers with experience of other software tools; engineers who are not CFD practitioners but want an insight into CFD; and CFD practitioners who would like to understand more about these open source codes.

Course fee* - £490 per person per day and includes a printed training manual, lunch and refreshments.

*Student, academic and group discounts apply, contact

 SEPTEMBER 2017 - Renuda and SNCF present CFD modelling for ventilation in rail tunnels at ISAVFT 

Renuda, together with SNCF Réseau, presented a validation study based on measurements and 3D CFD simulations of the Grand Pissy-Poville rail tunnel during tunnelling works at ISOVFT 2017.
SNCF Réseau is the owner and operator of the French railway network and, along with other responsibilities, is accountable for maintaining, upgrading and updating the rail infrastructure, part of which is over 100 years old. Due to the ageing infrastructure, tunnel regeneration work is regularly conducted resulting in airborne pollution accumulating which may lead to concentrations exceeding safety limits for workers. Achieving an acceptable level of air quality requires a) limiting emissions and b) ensuring there is continuous airflow through the tunnel and, when natural ventilation is not sufficient, mechanical ventilation must be planned.
For simple tunnel shapes SNCF Réseau uses a 1D model to evaluate the fans required to reduce the concentration of machinery exhaust gases and has the advantage of producing good results in a few minutes. However, for more complex tunnel shapes, or for the inclusion of engines and trains, airflow estimates with 1D modelling becomes difficult or inaccurate, as a result SNCF Réseau is developing 3D CFD models to perform ventilation estimations of these more complex scenarios. 
This validation study presented at the ISOVFT conference presents a series of velocity measurements carried out in an SNCF Réseau rail tunnel during construction work and took into account train shape, surface roughness and natural and forced ventilation settings. The results will be used to validate CFD models and help define recommendations for CFD modelling of complex tunnels and works configurations.
To obtain a copy of the paper please email


I JUNE 2017 - Code_Saturne and SALOME training in London

On the 5th and 6th of July Renuda held the first in a series of London based CFD training courses for delegates from throughout the United Kingdom representing the Imperial College of London, EEP (Environmental Engineering Partnership ), EDF Energy and EDF R&D Centre UK as well as a delegate from Halton Food Services in France.

The two day course combined theory with two practical exercises. The fundamentals of CFD, best practice guidelines, an introduction to open source CFD with Code_Saturne and SALOME were presented as an essential background to the practical exercises. Delegates were then helped to perform a whole CFD calculation on a simple case from CAD to analysis and, based on a 3D geometry, build, mesh and analyse data centre ventilation with and without a duct and fan using Code_Saturne, SALOME and ParaView.

As a result of the resounding success of this course another one has been scheduled for the latter part of the year and we are investing the possibility of holding courses in Germany as well as other countries in Europe. 

“This was a great introduction and I feel much more confident using this software moving forward.” - Dr. Tygue Doyle, Senior Mechanical Services Engineer, EEP

“Great course! A fantastic and useful introduction to Code_Saturne with a very informative tutorial.” - Jenny Nilsen, Junior Research Engineer, EDF Modelling and Simulation Centre


I APRIL 2017 - Open Source training – From CAD to visualisation

Renuda will be holding the first in a series of two day open source CFD training courses on the 5th and 6th of July in London.
Imparando (UK) LTD, 56 Commercial Rd, Whitechapel, London E1 1LP. Refreshments and lunch will be provided.
Course Content
Based around Code_Saturne and the suite of pre and post-processing tools SALOME, the course focuses on the fundamentals of CFD and recommended best practices. It offers a balance of theory and practical exercises and explores the chain of open-source tools required to carry out CFD analysis from CAD to visualisation.
Day 1
CFD best practices and an introduction to a chain of open-source software tools.
Day 2
A hands-on tutorial from CAD, to meshing, to modelling and simulation and analysis.
Attendees will each receive a training manual which will be referenced during and, if you so wish, after the course.
Who should attend?

- Professionals, academics, students interested in CFD and open source wanting to get first-hand experience of the SALOME, Paraview and Code_Saturne software for open source CFD modelling and analysis 

- People who already have experience of other software tools and want to explore alternative options

- Anyone who is not a practitioner but would like to know more about CFD

£490 per person per day including a printed training manual, lunch and refreshments

Please contact Robert Hillhouse at or +44 (0) 20 8785 0986 for registration details.

Registrations are accepted on the understanding that the printed programme is given in good faith, but may have to be re-scheduled or the speakers changed for reasons outside our control. Renuda reserves the right to cancel or postpone the course, in which case fees will be refunded in full. In the event of cancellation, Renuda will not be held liable for delegates travel or accommodation expenses.

I DECEMBER 2016 - Working with EDF R&D to keep hydroelectric turbines turning
The second Francis-99 Tokke workshop was held on 14 and 15 December 2016 at the Norwegian Hydropower Centre in Trodheim, Norway.  Dr. Panos Asproulis from Renuda presented frozen rotor and sliding mesh models applied to a 3D simulation of the hydroturbine using Code_Saturne, the EDF R&D open source general CFD solver. The project, a collaborative effort between EDF R&D and Renuda, was presented on behalf of both companies to 35 researchers from around the world. The entire project was carried out using open-source software only, from CAD to analysis.
The aim of the workshop was to assist Norwegian hydroelectric power plants resolve the problem of hydroturbine blades cracking, a serious, recurring problem requiring urgent attention. The outages have damaging consequences for the economy as major power stations are required to shut down and repair the turbines. The resulting operational costs are passed on to the end consumer, a knock-on effect which has far reaching consequences. To remedy the situation, the largest university in Norway, the Norwegian University NTNU, was commissioned to identify reasons for the blade failures and present their findings. 
As part of the solution NTNU created a model Francis hydroturbine and started measuring typical operational points of the full scale turbines for steady state (constant guide vane angle) and transient (time dependent guide vane angle) measurements. The difficulty they have is that, until the end of 2018 when they anticipate being able to measure stress on the mechanical assembly holding the turbine in place, they are restricted to measuring the flow properties at specific locations, prohibiting them from studying the forces and stresses on the blades. In an attempt to find alternate solution CFD companies were invited to present 3D simulation models.
Dr Asproulis presented a frozen rotor and a sliding mesh model which focused on three steady-state operating points; part load, best efficiency point and high load. Both simulation approaches are available in Code_Saturne, developed specifically for turbomachinery applications. Questioned by researchers in the audience regarding the relative merits of the two approaches, he explained that the frozen rotor model is a physical approximation, which is less complicated than the sliding mesh model because the rotor rotation is taken into account implicitly by the modification of the equations of motion. This reduces the computational effort by 25%, a critical factor when considering high computational costs. As an alternative, the sliding mesh model represents the real physical process and allows facilities with the computing capacity the opportunity to potentially produce more accurate results and the ability to capture unsteady phenomena related to rotor-stator interactions. Overall, compared to the mean quantities measured by the workshop organisers, both models gave results which compared well with the experiments. Work in progress was also presented demonstrating the ability of Code_Saturne to simulate transient operation conditions, when the vanes move in time, by displacing the mesh nodes to follow the vanes motion.
While the simulation presentations were seen as a step closer to resolving the problem, the university was hoping to gain a better insight into the rotor and the interaction between the blades and the vanes which influence the load on the blades. The Third Francis-99 Tokke workshop, scheduled for 2018, will invite CFD companies and researchers to present models which specifically address this aspect of the problem.
For more information on the project please contact us on + 44 (0)20 3371 1709 or email us at
| NOVEMBER 2016 – Talking CFD, Code_Saturne and much more!

On the 22nd of November Nicolas Tonello spoke to Robin Knowles from Talking CFD about CFD, software development, training, owning a CFD consultancy and what Code_Saturne has to offer as an alternative to other open source CFD codes. To listen to the podcast click 



Renuda UK is delighted to announce the first in a series of London based Open Source CFD training courses on the 20th and 21st of September 2016. These courses will be based around the general purpose CFD solver, Code_Saturne, and the suite of pre and post-processing tools, SALOME

Course objectives

The objective of the CFD training course is to enable course participants to undertake a complete CFD cycle, from CAD generation to results analysis using the following open source software:

  • - CFDStudy - prepare directory and file structures
  • - SALOME - geometry generation, meshing, results visualisation and analysis
  • - Code_Saturne - simulating the fluid flow

Module 1

A review of fundamentals and approach to CFD modelling to familiarise participants with CFD requirements; vocabulary; essential topics related to the physics of CFD simulation; and the choices required when setting up a CFD model. This module assumes that the participants are familiar with the Navier-Stokes equations.

  • - Overview of fundamental Navier-Stokes equations
  • - Solution methods - finite volume method, time and space discretisation, algorithms and       convergence
  • - CFD Modelling
  • - Fluid properties
  • - Types of flow - steady state or transient, single or multiphase, compressible or incompressible, laminar or turbulent
  • - Boundary conditions
  • - Turbulence
  • - Best practices

Module 2

Introducing CFDStudy and Code_Saturne and an overview of CFDStudy, SALOME and Code_Saturne aimed at familiarising participants with:

  • - The different software packages and their role in the open-source simulation cycle
  • - Software installation
  • - The GUI interfaces
  • - SALOME CAD, meshing and analysis tools
  • - CFDStudy and Code_Saturne directory and file structures
  • - Code_Saturne‘s functionalities, user coding and running simulations

Module 3

Practical CFD analysis exercises to complete a CFD analysis with the open-source tools. Participants will build a model from scratch, starting with the creation of a study and case, followed by the geometry, meshing, boundary conditions, Code_Saturne setup, run, and analysis. Based on participant requirement, a choice of Code_Saturne ventilation and pipe flow tutorials will be available.

To register, please contact Robert Hillhouse on +44 (0) 20 8785 0986 or

*To learn more about Code_Saturne please visit or for information on SALOME visit



Renuda, in partnership with EDF R&D, is engaged in an ongoing research project to perform full 3D, CFD modelling of Francis hydro turbines at different operating points and including transient operation.  The open-source platform SALOME and Code_Saturne CFD solver are being used to prepare the models, run, and analyse the unsteady calculations.  The results are scheduled to be presented at the Francis-99 Second Workshop in December 2016, for which our abstract has already been accepted.

or further information, suggestions or feedback regarding the program or Code_Saturne please call us on + 44 (0)20 3371 1709 or email us at

Renuda - an independent CFD engineering company, for engineers, by engineers. After thoughtful consideration EDF signed a multi-year partnership with Renuda to accelerate the development of Code_Saturne, EDF’s Open Source CFD solver, and increase its user community worldwide. The reasons cited for the partnership were; the long-standing relationship between the two companies; Renuda’s independent stance on using Open Source and Commercial codes; software development skills; and knowledge across a diverse range of industries.  The research program calls for collaborative development of new functionalities such as free surface flow; extending existing validations to a wider range of applications and industries; the development and delivery of training material; and training to an increasing global CFD community. EDF’s confidence in the partnership bears testament to our resourceful CFD problem solving approach, software development ability and commitment to advancing CFD. 
For further information, suggestions or feedback regarding the program or Code_Saturne please call us on + 44 (0)20 3371 1709, +33 (0)4 27 49 26 38 or email us at




Renuda was recently invited to present at the April 2015 Code_Saturne user meeting hosted by EDF in Paris. The user meeting is a platform for EDF and CFD users to share Code_Saturne case studies as well as an opportunity for EDF to showcase the latest developments for the open source code.

Renuda's presentation illustrated how difficult multi-physic industrial problems have been solved using Code_Saturne as part of an open source chain of CFD analysis tools. The applications presented were; optimising of a waste water purification system in order to minimise system pressure drop and maximise flow homogeneity; multi-species flow for the conjugate heat transfer in an exhaust gas heat recovery unit and assessing the efficiency of a combined coal and biomass power plant under different operating conditions.

For more information please contact us at or visit the Code_Saturne website at


As part of our international growth strategy, we are pleased to announce that we are now providing local CFD expertise in Germany.

With this presence, our main goal is to ensure that our clients get the timely service and support they need.

For more details, please contact us at



Renuda is delighted to announce its 10 years anniversary. A decade rich in industrial challenges, innovation and success which you helped make possible.

We look forward to continuing to work with you for many years to come.

A huge thank-you from the Renuda Team.



Renuda and Concepts NREC have recently signed a reseller agreement, for France and Benelux, to provide comprehensive software design tools for turbo machinery compressors, turbines, pumps and fans. Concepts NREC is a world leader in the design and manufacture of specialised equipment for turbo machinery. With this agreement, Renuda expands its range from providing Open Source CFD solutions to turbo machinery dedicated solutions which complements its turbo machinery expertise.

"Renuda's experience in CFD is impressive and we are looking forward to utilizing their strenghts to get our CFD software - and actually, our entire software suite - wider use and exposure in France and the Benelux countries," says Illias Mustafa, CN's Managing Director of Software Sales - EMEA (Europe, Middle East, Africa).

For more details, please contact us at



Discover our newsletter with a new downloadable Case Study and insights on Renuda's new product offer and talks.

-Simulation tools aid Alstom Transport to reduce costly prototyping

-Open Source Software and CFD

-Where is engineering analysis and simulation going?

-Renuda brings advanced solutions to the Turbo machinery industry

Click here to receive Renuda's quarterly newsletter



Our new Case Study highlights an added benefit to simulations. Renuda’s CFD simulations and technical insights helped Alstom Transport avoid costly prototyping and quickly identify the root causes of overheating. The ability to visualise and understand flow patterns graphically also enabled them to communicate the different industrial solutions and engage better with their gearbox design team, leading to more efficient and faster decision making.

Click here to access the Case Study.




Meet us at the NAFEMS Conference Simulation numérique : moteur de performance in Paris on 4-5th June.  We will be presenting our works with Open Source simulations for complex and demanding industrial challenges.
For more information, please contact us at



Renuda will present its works on testing and validating Open Source Software at the two-day conference organised by the NAFEMS UK on 10-11th June 2014 for “Accelerating the future of CAE”. The event will focus on existing best practices as well as state-of-the-art in CFD and CAD and more importantly what more there is to be achieved.
Come along and meet us on site, we will be pleased to discuss your projects.
For more information, please contact us at


Our newly Case Study features the development of alternative code to solve CFD open source software challenges applied to the Marine energy industry.

Click here to access the Case Study.

"THIS IS A VERY TRICKY, CHALLENGING AREA TO WORK IN; RENUDA IS VERY GOOD AT IT". Professor David Ingram, Professor of CFD. Institute for Energy Systems, University of Edinburgh.



Renuda supporting and advising the UK Consortium on Turbulent Reacting Flows (UKCTRF) lead by Professor Nilanjan Chakraborty.
Officially launched on January 8th 2014 , the UKCRTF Kick off meeting  was reuniting leading academics from 15 UK Institutions joined by internationally recognised experts to form the UKCTRF.

Funded by EPSRC ( Engineering and physical sciences Research Council), the consortium  will make a focussed effort to address the global and UK challenges of energy efficiency, environmental friendliness and high-fidelity fire safety.
Renuda’s considerable industrial experience has been chosen as the industrial advisor (Impact Advisory Panel) of this major collaborative Research Program as long as with Rolls Royce, Shell and BP.
The UKCTRF will use High Performance Computing (HPC) resources to challenge engineering applications ranging from the formulation of reliable fire-safety measures to the design of energy-efficient and environmentally-friendly internal combustion engines and gas turbines. Results and the high-fidelity computational tools will aid UK based manufacturers to design new generation of combustion boosting the UK economy.


Click here to access past News 


Welcome to the Renuda website. Explore our services and case studies.

Have you found us on LinkedIn? We are also on Twitter and Facebook.

Copyright © 2018 Renuda ® All rights reserved. web designer