Computational Fluid Dynamics

PHOENICS and FLAIR were both developed and are owned and surported by CHAM (Concentrated Heat and Momentum) in the UK and ACADS-BSG are the agents for their release in Australia and S.E.Asia. For a detailed description of PHOENICS and FLAIR and their capabilities see www.cham.co.uk


The program PHOENICS simulates fluid movement and heat transfer for a wide variety of applications using computational fluid dynamics. It can be used:

For Fire Engineering to model:

  • Smoke spread and ventilation in buildings
  • Fire modelling in and around buildings

For internal flows in:

  • Air conditioned or ventilated spaces
  • Car park ventilation systems
  • Cool storage rooms
  • Pipes ducts and furnaces

For external flows in:

    Urban and industrial pollution studies

  • Contaminant spread and containment
  • Deposition of airborne sediment
  • Environmental impact studies

FLAIR is a reduced version of PHOENICS for use in analysing air flows in air conditioning and ventilation systems and fire or smoke spread.

PHOENICS and FLAIR were both developed and are owned by CHAM (Concentrated Heat and Momentum) in the UK and ACADS-BSG are the agents for their release in Australia and S.E.Asia. The program can be licensed annualy or perpetualy or can be loeased for limited periods. Because the program requires considerable experience and knowledge to use, ACADS-BSG can refer designers who have a requirement to use either program, to one of our experienced users.

PHOENICS has many features being able to solve problems:

  • Of 0, 1, 2 or 3 dimensions
  • With steady or unsteady flow
  • With Laminar or turbulent flow
  • With varying or uniform properties
  • With radiation (IMMERSOL)
  • With fine grid embedding (PARSOL)
  • With moving objects
  • With or without chemical reaction
  • With one or two flowing and intermingling phases

The Visual Reality Editor:


The DOMAIN Models Dialogue Box

The PHOENICS 3D graphical front end allows the user to set up the domain and create and locate 3D objects, using an extensive library of clip art and assign to these the attributes required by the CFD solver with easy to use WINDOWS style dialogue boxes. The graphical editor allows the user to visualise the model being developed. Inlets, outlets, fans, blockages, plates, fires, etc. with their specific attributes can be included in the model. The grid and the parameters that control the iterative solution process are under the control of the user and are easily set in the domain dialogue boxes.


Air Flow in a Lecture Theatre

The program solves for pressure, temperature, velocity, contamination or smoke and indeed any fluid property desired to be determined. The user’s own Fortran algorithms can be added to the calculations and objects can be imported from AutoCAD or generated with a Shape Generator. The program can use rectalinear or polar co-ordinates. A wide range of solution models are available and there are a number of add-ons available for specific special applications.


A Fire on the Stage of a Theatre

The Calculations:
The calculations are performed in the program EARTH and while this is running, an aqctive graphical display of each variable being solved and the current error in the iteration is provided. The user can also interrupt the calculations and reset the relaxation of any of the variables to accelerate the calculations. This is important because on more complex problems the calculations can take hours and even days to converge.


The Solution Monitor

The Visual Reality Viewer:
The results of the simulation can be readily viewed in the Virtual Reality Viewer. This provides a graphical representation of the fluid movement in the form of colour coded velocity vectors or temperatures, pressures or contamination contours. These can be displayed on planes across the domain or as 3D views. Streamlines can be fired off from any point in the domain. Al functions are driven from a control panel on the side of the graphical display to make the viewing of the results easy.


Temperature Contours in a Theatre

Examples of Use:
An example of the value of CFD is the prediction of hazard due to fire in an enclosed space, such as a shopping centre, office building, theatre or stadium. PHOENICS/FLAIR can predict the spread of the smoke layer for various combinations of fire intensity, fire location, air inlets, smoke outlets and structural features. Based on these predictions, the design of the ventilation arrangement and the sprinkler system can be adjusted to give fire fighting and rescue operations the best chance of success.
Alternative experimental analysis are costly and may be dangerous. They are rarely able to review the effects of making changes, whereas it is extremely simple to alter the parameters which PHOENICS/FLAIR is asked to model.

Stay informed

Keep up with ACADS – BSG’s latest news. Sign up below or follow us on LinkedIn.

Website Subscription Form

The user interface for HYENA+ is much cleaner and more user friendly than the UI used for the original HYENA program. This makes the experience more enjoyable, easy, and less taxing when using the program for long periods of time. HYENA is an excellent tool to have and its now web-based nature with HYENA+ has allowed it to become even more beneficial.

– M. Cummings

It has always been a pleasure dealing with ACADS-BSG team due to their helpful nature and quick response time to any inquiries and technical issues. Camel\Hyena works out of the box and install time is in seconds, I cannot recommend any other company that provides better customer service other than Catherine and her team.

– Marvin D

Catherine and the team at ACADS provide customer service of the highest standards always offering the best solutions for our business with fast response times. I would highly recommend ACADS-BSG.

– Amy

The ACADS BSG suite of software has been used by VOS Group for 30 years. We as a company have grown as the software capabilities have changed with usability and technology. The support from head office has always been quick and accurate, with a resolve to overcome any obstacles. We have always found the outputs to be accurate and reliable and a good basis for good engineering design.

– Shayne C

Moving to a cloud based platform has improved the overall performance of the software. [being able to log in from any device] has improved my overall productivity as I only need to carry my smart phone or a tablet, and I can do my job remotely. Tools and functions are clearly organised within the new interface reducing any confusion for a new user. Copy+ Paste option saves a lot of time for Engineers like me. It just works like an Excel Sheet, where you can copy items and paste them somewhere else. It saves a lot of time especially if you are working on a single project and you want to do multiple calculations.

[HYENA+] allows me to quickly switch from one calculation to another without losing any data. This has reduced the overall lead time in doing calculations. I am sure [HYENA+] will have a positive impact on the Fire Industry.

– Ahkil M