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  • Tutorials List
    Import Datmaker Repairing and Splitting a CAD file into individual objects Datmaker Merging and Subtracting Objects Transient Heat conduction in a bar Rupture of a diaphragm Body Fitted Co ordinates BFC 1 Points and Lines BFC 2 Making Frames BFC 3 Frame matching BFC 4 Copy Transfer BFC 5 Boundary Conditions BFC 6 A Simple Case Multi blocking 1 T Junction natural link Multi blocking 2 3 Blocks unnatural link Grid generation via PIL commands Polar Co ordinates Flow in a Cylindrical Jet Pump 3D Swirling Flow Through an Orifice Plate Radiation Models IMMERSOL IMMERSOL 2 bodies in a duct IMMERSOL in an electronics box Combustion Models SCRS ESCRS CHEMKIN Turbulence Models Turbulence modelling The LVEL turbulence model Multi phase IPSA IPSA workshop 1 Two Phase Flow Solids in Air IPSA workshop 2 Introducing non standard interphase transport correlations using PLANT IPSA workshop 3 Two Phase Flow Boiling in Water Steam system Scalar Equation Method SEM workshop 1 Water pouring over a backward facing step 2D SEM workshop 2 Water pouring into a bund 3 SEM workshop 3 A lighter fluid penetrating heavier liquid Algebraic Slip ASM workshop 1 Flow in a Separator 2D Shallow water flows Shallow water workshop 1 Local depth in an open U bend Shallow water workshop 2 A whirlpool in a shallow pond viscous flow Lagrangian Tracker GENTRA GENTRA Particle tracking Flow of solid particles over a backward facing step Moving Bodies MOFOR Overview of the MOF file MOFOR Example Agitated tank FORTRAN Coding Using PLANT Using GROUND In Form In Form Inlet boundary layer profile In Form Time dependent heat source In Form Object related Source In Form Average Values and Tabular Output Miscellaneous Boundary conditions and sources Creating VR geometry Making new objects from old Using the AC3D Solid Modeller PRELUDE The basic

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_lecs/general/tuts.htm (2016-02-15)
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  • FLAIR Tutorials
    and radiator The material of the radiators is selected from the property data base A fixed heat flux is used as the heat source for the radiators Tutorial 3 Comfort indices in a room is similar to tutorial 2 but adds a chair and a sitting person into the room This tutorial demonstrates how to activate the comfort index option Tutorial 4 Fire in a room shows how to use the Fire object for simulating a fire in a room Smoke movement is also simulated Tutorial 5 A room with sunlight describes how to use Shapemaker to create a sunlight object in the model building Tutorial 6 A cabinet with a fan illustrates how to use the fan working point option and how to create a fan data file for the simulation Tutorial 7 Flow in a computer room shows how to use Group and Arraying objects features to add the desks and computers The case also shows how to load a round diffuser from the predefined HVAC object library Tutorial 8 Flow over Big Ben demonstrates how to import a CAD file in STL format into the FLAIR VR Editor to create the geometry This tutorial also shows how

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/flair/fla_tuts.htm (2016-02-15)
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    or from the keyboard Statements starting in column 3 or greater are treated as comments Getting Help And Status Checking Entering will elicit general advice and suggestions for further inquiry Entering a variable or command followed by will elicit help on that item All on line help entries are also printed in the PHOENICS Reference manual TR 200a and are available through the on line Encyclopedia Entering a variable followed by RETURN will cause Satellite to display the current setting of that variable The command SEE will cause Satellite to display all currently active variables in Group 1 Further RETURNs will display subsequent Groups SEE n will display the settings in Group n directly GROUPn will display a list of all variables and commands belonging to group n Access To The Library The command SEELIB will display the contents of the PHOENICS Input Library starting with the contents list Cases from the Input Library can be accessed by LOADing them LOAD case number will cause Satellite to read in and act on the data settings for the specified case Further commands or menu settings will then act to modify the basic Library case Ending The Session Once all data settings have been made and are correct the command END will cause Satellite to write out the EARDAT file for Earth and stop Before stopping the user is given the opportunity to overwrite the existing Q1 file with the stack of commands held in the Satellite memory This will contain all that was read in from Q1 together with all that has been entered at the keyboard If the user answers NO to the overwrite Q1 question and only then realises that three hours of hard work have been lost they should not despair The file COPYQ1 will contain a copy

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_lecs/general/pilintro.htm (2016-02-15)
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  • fire protection system in the car park comprises a smoke exhaust ventilation system with a number of strategically placed jet fans that transport the air smoke mixture towards the extraction fans The system is intended to ensure the safe escape of the occupants from the various car park levels by maintaining any smoke layer above the heads of the people The PHOENICS model simulated two levels of the car park and included such details as ceiling mounted ventilators extract fans columns dividing and external walls ramps and other internal structures The task was to predict fire and smoke movement in the underground car park for a number of ventilation designs PHOENICS was used to simulate a car fire on the lower level by means of a time dependent source of heat and smoke thermal radiation was modelled by means of the computationally efficient and pragmatic IMMERSOL model The final design for fire containment employed jet fans on the upper level to force air down towards an extract fan located on the lower level The PHOENICS INFORM facility was employed to specify via the pre processor a smoke dependent gas emissivity In addition INFORM was used by Rucon to introduce their

    Original URL path: http://www.cham.co.uk/casestudies/rucon_pr.htm (2016-02-15)
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    hydrostatic The temperature of air entering form outside is also set to 15 degrees C The fire was modelled as heat source uniformly distributed over a volume 30cm 30cm 30cm releasing 70 kW Flow considerations The flow was simulated as turbulent using the 2 equation k epsilon model Buoyancy was taken into account using the Boussinesq approximation Results Velocity Velocity vectors at height of 0 7 metres from the floor this figure shows the important recirculation near the fire location Magnification of the velocity vectors near the fire A magnification of the previous picture showing that the recirculation is 3 dimensional The hot air released by the fire is going upward at a high speed leaving a zone of low pressure sucking air from the room outside Velocity vectors at vents height This figure shows the velocity vectors in a horizontal plane across the vents showing the inflow through the supply and outflow though the return and through the door Temperature The temperature contour scale has been set to 15 150 degrees C to enable variations within the room to be viewed The red band also includes temperatures above 150 degrees C up to a maximum of 500 degrees C

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_spp/flair/d_applic/nist.htm (2016-02-15)
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  • Underground Garage: Ventilation and Fire Study
    end of the garage from the open entrance Under normal circumstances only one shaft is used but both are used during a fire emergency Additional control over the air flow is provided by a number of jet fans near the roof Under regular conditions the air is extracted via the shafts and is drawn in through the garage entrance but all elements of the system are bi directional this means that the flow direction for emergency ventilation can be selected to maximise the time for evacuation and fire fighting and to minimise the risk of the fire spreading to the rest of the building The basic purpose of the ventilation system is that it should avoid the build up of excessive exhaust fumes This requires an adequate air flow in all parts of the space dead zones are to be avoided The regular ventilation system draws air through the garage but some of the jet fans near the centre are operating to force flow back towards the entrance This is intended to maintain air movement and mixing The figure shows streamlines coloured by time it is apparent at least qualitatively that the air reaches almost all of the garage in a satisfactory manner During a fire the requirements are rather different the garage must be kept free of smoke in such a way that suppression by the fire brigade is possible The simulations assumed a heat source of 5MW typical of the burning of one large car or two small ones The worst case scenario was considered to be when the garage was free of other parked cars because in that case the ventilation system has to handle a larger air volume In view of the location of the fire the ventilation direction was reversed with air entering through the

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_applic/recapps/vanhooft/single/single.htm (2016-02-15)
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  • Multi-Storey Car Park: Fire Study
    building Eight ventilation shafts are used with two feeding air into the car park at each corner on each level the total forced air flow is about 14m 3 s on each floor The location of these air inlets can be seen on the figure shown in colour On the upper storeys the ventilation is natural although there are walls around the parking levels these are mainly open 35 blockage factor The aim of the simulations was to investigate the movement of air heat and smoke in the case of a car fire in the underground part of the building the lowest level was chosen for the fire location The size of the fire was set at 8MW roughly equivalent to two or three cars The simulations were steady state designed to investigate the worst case scenario and to show the path that would be taken by the hot gases and smoke from the fire The combustion process was not included in the simulation and radiation was also omitted so the case corresponds to a real fire that has a higher heat release by about 10 20 The first figure above shows temperature contours on a plane through the central space of the car park note that all temperatures above 100 C are shown in red and that some of the structures have been made semi transparent for clarity The hot gases eventually rise harmlessly out of the car park away from any people dispersed by the wind from the left of the picture However before that they spread to the level above the fire itself location shown as a red object in the foreground because the forced ventilation is not strong enough to drive them to the central space The second figure shows the 40 C temperature isosurface It

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_applic/recapps/vanhooft/multi/multi.htm (2016-02-15)
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  • Madrid Xanadu Shopping Mall Fire Study
    simulations The first figure shows temperature contours at head height on the upper level It is clear that the temperature is dangerously high when there are no vents and that the vents reduce this to a level which is little higher than the ambient temperature 30ºC the smoke concentration contours show the same effect The second figure shows streamlines emanating from the fire The reason for the difference in the temperature contours is clear Without the vents the hot and smoky air fills the domed roof and can only escape through the walkway the worst thing that could happen The vents enable the hot air to escape easily in fact the number or size could easily be reduced without compromising the safety of the building Note the blue contours showing the path of the air before it is entrained into the fire it is drawn in along the full length of the lower level of the hall The PHOENICS simulations enabled a good understanding of the air flow in the food hall to be obtained under the assumed fire conditions The effectiveness of the high level vents could be demonstrated enabling the modified design to be validated The whole package of fire design measures of which the smoke control was a part resulted in an estimated saving of about 250000 euros and a solution more suited to the environment 2 Technical Summary The simulation of the Xanadu Shopping Mall posed no particular difficulties as far as modelling was concerned The fire was simply specified as a heat source of 2 5MW distributed over an arbitrary volume of 1 5m x 3 0m x 1 0m height placed inside the shop unit the smoke value was fixed at 1 0 within the fire volume so that values elsewhere would be relative

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_applic/recapps/xanadu/xanadu.htm (2016-02-15)
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web-archive-uk.com, 2016-10-21