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  • PHOENICS Demonstration:
    and main entrance and exit are held at atmospheric pressure with an external temperature of 20 C Four rows of three parked vehicles are considered A single pollution source is located near the rear of one of the vehicles the engine has been left running At this location the temperature is fixed to 30 C and the pollutant concentration is held at 1 0 The geometry took 2 hours to set up and the calculation approximately 5 hours for 1000 iterations on a 266MHz Pentium II The results are visualised with PHOENICS VR 3 2 The Results The following pictures are supplied as GIF files Fig1 gif Velocity vectors near the floor The impact points of the ceiling jets can be seen It is likely that the inlet air velocity is too high and or the inlets should have been angled horizontally across the roof space Fig2 gif Isosurface of pollutant concentration Fig6 gif Velocity vectors at approximately head height Fig7 Fig8 Fig9 Fig10 gif A sequence of velocity vector plots starting in the plane of one row of ceiling vents Fig7 Here the jets can be clearly seen and the entrainment of surrounding air FigS8 10 are then progressively

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_applic/d_enviro/pti/pti.htm (2016-02-15)
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  • the new Park Lane Transport Interchange should not be uncomfortable for passengers PHOENICS was used to predict wind velocities beneath the bus station canopy both with and without protective screens WIND EFFECTS AROUND A BUS STATION CANOPY Simulation Details 10 m s wind 2 D simulation curvilinear grid to represent canopy shape Chen Kim extension of k epsilon turbulence model 3 cases i no screens ii upwind screen iii downwind

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_applic/d_enviro/busroof.htm (2016-02-15)
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    18 metres by 16 metres by 6 metres high Up to 275 persons can be seated in this lecture theatre Geometry top view Geometry inside of the room Simulation There are five supply air diffusers visible on the first picture of the geometry distributed as follows two at the back of the room one at the front and one on each side Each diffuser is injecting 550l s at a

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_spp/flair/d_applic/lecroom.htm (2016-02-15)
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  • Hackney Central Hall Ventilation Studies
    and additional low level displacement terminals are provided within wall panels below the side balconies Air is removed by natural convection from a line of vents along the centre of the ceiling The figures show visualisations from one simulation In this case the under seat air supply is active in the rear balcony at a temperature of 18ºC cooler 12ºC air is provided along the side of the auditorium from under balcony vents and from a larger wall panel Heat is produced by the people in the lower auditorium and the balconies at an assumed rate of 145W m 2 the lights produce heat at a rate of 50W m 2 and 25W m 2 above the stage and the public area respectively The results show the consequence of the lack of ventilation below the rear balcony A significant circulation zone is created drawing the air from the region in front of the stage which then flows over the rear balcony before reaching the high level vents This in turn twists the cool air curtain from the side ventilation panels reinforcing the circulation Temperatures are generally acceptable in the occupied areas including the stage which is if anything cooled too much The PHOENICS simulations enabled a good understanding of the air flow in the hall to be obtained under a wide range of different occupancy levels The capacity of the ventilation to deal with these conditions could be investigated and appropriate settings devised for each 2 Technical Summary Hackney Central Hall is a large auditorium 33m 22 8m 12 7m height The main features of the geometry were constructed using standard solid shapes superimposed on a Cartesian grid The grid chosen was 60 20 78 modelling half of the hall providing sufficient accuracy to capture the most important aspects of

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_applic/recapps/hackney/hackney.htm (2016-02-15)
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    Two air vents are located on each floor on the left hand side of the geometry drawing and two air extractors on each floor on the opposite wall A pump is located on the ground floor Geometry Boundary conditions and heat sources Each inlet injects into the room 0 5 m3 s at 15 degrees C Each of the four outlets maintains a constant 15 Pa differential pressure The temperature of the reactor is fixed to 70 degrees C Finally the pump releases a heat of 500 Watts to the room Velocity vectors and streamlines The two following animations were created from pictures of the standard VR Viewer In the first one some objects are hidden for viewing purposes in the second one the objects are outlined The picture of the streamline was also taken in the VR Viewer Velocity vectors animation 1 Velocity vectors animation 2 Streamline 1 Pressure Contours The following picture showing the pressure were taken from the post processor S Photon Pressure contours at the inlet plane Pressure contours in a plane crossing the reactor Pressure contours at the outlet plane Temperature Contours and Isosurface First some plots of temperature contours in different planes are given

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_spp/flair/d_applic/raytheon.htm (2016-02-15)
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  • concentration envelope below a defined size Aim of CFD study is to assist in evaluation of alternative ventilation strategies to ensure compliance 1 GEOMETRY The next panel shows the geometry Air enters through the green rectangular regions from the adjoining accessory compartment Turbine casing and exhaust box are hot Assumed leak location is shown Model features 3D steady cartesian grid ASAP buoyancy GEOMETRY 2 VELOCITY VECTORS ON VERTICAL PLANE THROUGH

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_applic/dgln/turbven.htm (2016-02-15)
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  • standart K E model of turbulence is modified to take into account the plant airflow interactions resulting in momentum sinks The corresponding GROUND codings are made by way of PLANT option The main details can be found in paper by S Zhubrin et al Practical evaluation of turbulence models applied to on line wind turbines on a complex te r in presented at International Seminar of AirFlows on Complex Terrain

    Original URL path: http://www.cham.co.uk/casestudies/terrain/terrain.htm (2016-02-15)
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  • DETAILS Three Dimensional Steady flow Curvilinear BFC computational grid NOTES FLAIR predicts the Temperature and Air movement in the concourse Warm air enters the hall through ducts in the ceiling above the check in counters at 27 degrees Strategically located

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_applic/d_enviro/airport.htm (2016-02-15)
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