fluidyn PANACHE

A Powerful Tool for 3D Atmospheric Pollution Modeling:

Atmospheric pollution study and its control is the most predominant subject world over as it has direct relation to breathing air, drinking water, vegetation etc. The pollution affects the health of not only human being but all the living creatures and vegetation.    For past many years conscious efforts have been made to minimize the abuse of air, water and land in order to contain the spread of pollution and toxicity in the atmosphere. Evolution of refined modeling tools, have made it possible to simulate the conditions created by pollutants and predict their effect as health hazard

Available Tools & limitations:

Till recently, the only available modeling tools were Gaussian methods, which have following limitations:-

• Only 2D modeling available at pre-specified points in a selected domain.

• Its predictions have been highly inaccurate near the source and at low wind speeds and near the ground.

• Also Gaussian modeling is based on various assumptions which do not match with realistic or monitored results.

• Gaussian solutions assume that the pollutant concentration follows a normal (Gaussian) distribution in all the three directions. 

• It is developed to estimate the spread of passive pollutants that is pollutant with a density close to the density of air.

• They do not take the ground roughness or the possible obstacles into account.

• The Gaussian models are not applicable at a close range from the source (about 100 meters), the pollutant concentration being high enough so that it is not a lesser constituent of the fluid carrying it. 

• The hypothesis of the pollutant being carried by the fluid, mean movement is not verified, especially for the heavy gases. 

New Improved Tools: 
 The only available tools for accurate modeling of atmospheric conditions are CFD based 3D modeling tools  which can cover and predict pollutant data at any point within a specified domain.

Difficulty with general CFD tools

1. Difficulty for the user is that lot of coding will be required to be done in order to make the general CFD tools workable for environmental modeling.

2. Because of  high level of mathematics and science involved in CFD, the services of a CFD expert will be required to adopt CFD tools for environmental modeling

3. Also the creation of mesh for discretization of the domain is a time consuming  process. Again, services of expert will be required

  Hassle free Ultimate Solution: Fluidyn-PANACHE

To overcome the aforesaid difficulties of the user and as its contribution to environmental modeling &  study,  Fluidyn has developed a suite of, ready to use,  CFD based 3D environmental modeling software under  fluidyn brand name which have been validated and used and reused by reputed international agencies in EU,  UK,  Asia and Asia Pacific, for last 10 years. These software tools cover all  form of pollution viz air, surface water, soil, ground water, open spaces, confined spaces, hazardous and toxic industries and environments.

1. fluidyn-PANACHE is a family of software exclusively devoted to atmospheric pollution modeling using 3D CFD tools. These software are developed in consultation with reputed organizations like ADME, INRIS in technical collaboration with   European Universities and are validated on real life problems.
2.  fluidyn-PANACHE group of software are in use in different parts of the world like UK, France, Germany, Holland,  Italy, Middle East, Japan, Korea, Thailand, South Asia, Asia Pacific etc.
3. fluidyn-PANACHE range of software are interfaced with very user friendly GUI and easy to use menu options.
4. The user has to follow simple steps and the complicated task of creating domain/terrain geometry and mesh generation are done by the software, based on input data.
5. Solvers take up complicated and accurate 3D CFD modeling just by using simple commands
6. Post processor gives various plots and animations for velocity, concentration, wind flow, threshold regions etc.

More About fluidyn-PANACHE

fluidyn-PANACHE  is a software package designed especially for 3D simulation of atmospheric pollution, using well established computational fluid dynamics principles (CFD). It consists of following modules:-

1. Graphic User Interface (GUI), which has pre-processor for entry and display of input data and  post processor for  display and viewing of output results. It also has automatic geometry and tailor made mesh generator  for creation of terrain geometry and corresponding mesh for terrain digitization.

2. Solvers : fluidyn-PANACHE has a 3D unstructured solver for fast  and accurate results.

fluidyn PANACHE can cover a domain of several hundred kilometers in length and breadth and several hundred meters in height. Thus giving a 3D domain mesh, wherein at any point of the domain various results like wind velocity, pollutant concentration etc can be accurately predicted.

fluidyn PANACHE is the only Industrially available software which takes into account all topographical and meteorological parameters in a high precision numerical scheme.   

fluidyn PANACHE predicts the spread of different types of pollutants released into the atmosphere under various conditions. The user is invited to supply all the relevant data via a user-friendly menu to conduct the simulation.  Results of the simulation can be viewed in graphic details using the post processing facilities offered as part of the software package. 

FORECASTING URBAN AIR QUALITY WITH THE HELP OF 3D FLUID MECHANICS

...back to top

USER INTERFACE

fluidyn PANACHE provides best GUI to the user. A model developed can be viewed in 2D and 3D mode. Menu Driven options are given to the user so that he can save the simulation model and further he can load and use it. The Menu  enables the user to type the Input Data for the simulation 

fluidyn PANACHE has a mesh generator tailor made for its requirements. However, it can also read mesh generated by other software. 

fluidyn PANACHE menu has two options :

1. Preprocessor Option: The pre-processor provides following facilities:

• Manual creation of computational domain, Refinery (Site, Unit & Section), Equipments, Fluid database,    Confidential fluid mixtures, Threshold database and Meteorological stations.
• Save terrain, meteorological, equipments and result files in ASCII format.
• Save simulation options.
• Update the Fluid database through menu.
• Load meshes in different formats.
• Load simulation options.
• Load terrain, meteorological and case definition in ASCII format.
• Interactive specification of boundary conditions. 
• Manual control over simulation options.
• Damage circles can be drawn for different risk criteria. 

Post-Processor Option: The post-processor has multiple view port capability. Each view port can have many plots.   The following plots can be drawn: 

Pollutant quantity or concentration level at various locations Time averaged concentration of pollutants Percentile value of pollutant concentration at monitoring locations Grid plots Velocity Vector plots Contour plots Surface plots XY graphs of residual history Trace plots of any variable at monitor points Temperature gradients at different locations. Velocity components u, v and w at various locations. Pressure and Total Head at Various locations. Density and viscosity variations (due to pollutants) at various locations. Animation facilities with text / graphical annotation are available for playback Pictures can be stored as Bitmap files (*.bmp)

Special Option: Dynamic Post Processor

Zoom-in and Zoom-out facility is available in both pre and post processors. Animation facilities with text / graphical annotation are available for playback. Hardcopy plots on HPGL and PostScript plotters are possible. Pictures can be stored as Bitmap files (*.bmp).

The Post-Processor can dynamically display the results (in the form of selected plots) while the solver is running. Thus, the results obtained can be monitored, input parameters changed, and the solver re-run all without leaving the software environment. The dynamic post-processor further allows the user to monitor the progress of solution  in case of complex problems thereby reducing total solution time.

...back to top

APPLICTAIONS

• Designed for dispersion of the pollutants in complex terrain.
• Town and City Planning: Placement of trees, building locations and height, subway locations, flyover locations.
• Industrial area Planning: Choice of site, Working hours, Chimney locations and height, Building locations, requirement of green belt area
• Forest and vegetation: Implementation of complex site studies (like topography sea side, presence of vegetation, forest and lakes)
• Potential source (of pollution) identification
• Sensitivity analysis of various surface flux parameters.
• Wind field modeling
• Pollutant Dispersion in a Complex Terrain.
• Pollutant and Particle dispersion from vehicles and Industries. 
• Noise propagation from Roads and Industrial sites.
• Chemical decay, transformations and odour dispersion.
• Transport of particles and droplets and their interaction in the atmosphere.
• Dispersion of air borne particles from pollutant sources.
• Dispersion of radioactive gases in mines and valleys.
• Photochemical kinetics mechanism for urban atmosphere.
• Wind energy Management.
• Detonation, Deflagrations and Fire propagation.
• Industrial Fire and Risk Assessment.
• Simulation of smoke movement, soot formation and visibility attenuation.
• Dispersion of heavy gas, jet fire, blast, BLEVE and UVCE
• Dispersion of Pollutants and Fire inside Tunnel and Subways

...back to top