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  • TR211: GENTRA User Guide Appendix H
    package GENTRA consists of The GENTRA Menu a collection of data files to be used with the PHOENICS SATELLITE pre processor The GENTRA GROUND a PHOENICS EARTH GROUND Station which contains the tracking routines GENTRA CARTESIAN SYSTEM GENTRA uses for the integration of the particle equations a Cartesian co ordinate system This system is related to the PHOENICS grid system as follows For Cartesian grids both systems are identical For BFC grids the GENTRA Cartesian system is the same Cartesian system used in PHOENICS to define the grid corners For cylindrical polar grids the relationship between both systems is depicted in the figure The Z axes of the two systems coincide forming a right handed grid in each case The relationships connecting the two co ordinate systems are Xc R r cos Xp Yc R r sin Xp Uc Vp cos Xp Up sin Xp Vc Up cos Xp Vp sin Xp where R YVLAST OBSTACLES See WALLS PARCEL The term PARCEL is used to refer to a group of particles that are injected at the same time at the same position and with the same properties The parcel is characterised by a MASS FLOW RATE kg s which specifies

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_docs/tr211/apph.htm (2016-02-15)
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  • TR211: GENTRA User Guide Appendix I
    Model for Gas Droplet Flows ASME J Fluids Eng pp 325 332 G M Faeth 1983 Evaporation and Combustion of Sprays Prog Energy Comb Sci Vol 9 pp 1 76 A D Gosman and E Ioannides 1981 Aspects of Computer Simulation of Liquid fuelled Combustors AIAA 81 0323 AIAA 19th Aerospace Sciences Meeting St Louis Missouri USA D B Spalding 1980 Numerical Computation of Multiphase Fluid Flow and Heat Transfer

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_docs/tr211/appi.htm (2016-02-15)
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  • TR211: GENTRA User Guide Appendix J
    Mass of a particle Nu Nusselt number Re Particle Reynolds number Re T Temperature T L Liquidus temperature T s Solidus temperature W Molecular weight m Solidification index D te Eddy lifetime E6 10 D tr Eddy crossing time E6 12 D te Lagrangian time step a Particle heat transfer coefficient U Instantaneous continuous phase velocity U c Fluctuating continuous phase velocity Section 6 6 1 U c Continuous phase

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_docs/tr211/appj.htm (2016-02-15)
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  • TR211: GENTRA User Guide Appendix K
    track to draw If m is present all tracks in the range m n will be drawn K 1 2 Running UNPACK The track unpacking program UNPACK is run by clicking on Run Utilities GENTRA track unpacker This is required to create individual history files for plotting in AUTOPLOT but is NOT needed for the Viewer Start the track unpacker as described above The track unpacker assumes that the name of the global history file has not been changed from the default name ghis The single character identifiers for the names of the individual history and trajectory files must now be specified Typing none will deactivate the production of one or other or both of the file types In this example we may want only history files for viewing in AUTOPLOT so type none h to prevent creation of trajectory files and to indicate that the name of the history files are to commence with h The particular tracks for which files are to be produced must now be specified These files can be specified by the individual track number e g 3 4 Combinations of numbers and range up to a maximum of 20 inputs can be accepted e

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_docs/tr211/appk.htm (2016-02-15)
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  • WORKSHOP - Getting to Know PHOENICS
    about PHOENICS and all the tutorials Encyclopaedia contains descriptions of all the command language variables and many articles on features of PHOENICS Look through the Encyclopaedia and familiarise yourself with the layout Investigate the Search Facility Perform searches for key phrases such as turbulence models Click on Help Search Type the search word or phrase into the Search for box tick the areas to search in then click OK A page containing links to the requested item will be displayed in a browser window Investigate the PHOENICS VR Environment The default mode of operation of the PHOENICS VR Environment is VR Editor In this mode CFD cases can be set up and modified A pull down menu bar at the top of the window provides access to file handling utilities and to the other PHOENICS modules such as Earth VR Viewer and POLIS Investigate the Libraries Click on the File Load from libraries If you know the number of the case you want to load type it into the case number data entry box and click OK Otherwise click on Browse and use the next to each library name to expand or collapse the library listings Click OK to confirm the selected case number and then OK to load it Normally each loaded case will wipe out the previous one so that the last library case loaded will be the new Q1 file To obtain a solution for the loaded case click Run Solver The solution can then be visualised in the VR Viewer To run the Viewer click on Run Post processor GUI post processor VR Viewer Click OK to accept the default file names Many library cases have Viewer macro commands embedded in the input file To run any macro commands in the input file press the F3

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/wsfamili.htm (2016-02-15)
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  • TUTORIAL - Simulation of a Flow. Step 1.
    screen to resize click on the pull down arrow next to the R icon on the toolbar then Fit to window Introduce the required objects Click on the object management button O on the toolbar or on the Control panel also sometime called hand set This will display the object management window with a list of objects of which only DOMAIN is currently present You will now introduce the objects which you require one by one giving each a position and size You will also introduce attributes for example material velocity or temperature so completing the description of the situation to be simulated Introduce the INLET object Click on Object New and New Object Change name if you wish for example to MY INLET not more than 8 characters can be used Click on Size and set SIZE of object as Xsize 0 0 Ysize 1 0 Zsize 1 0 Click on Place and note that the default Position of object Xpos 0 0 Ypos 0 0 Zpos 0 0 need not be changed Click on General Select Type INLET Click on Attributes and set the velocity in X direction to 0 05 m s Click on OK to close the Attributes menu and on OK in the Object Specification Dialogue Box Introduce the OUTLET object Click on Object New and New Object Change name to MY OUT for example Click on Size and set SIZE of object as Xsize 0 0 Ysize 1 0 Zsize 1 0 Click on Place and set Position of object as Xpos 2 0 Ypos 0 0 Zpos 0 0 Click on General Define Type OUTLET Leave the default values in the Attributes dialogue box Click on OK to exit the Object Dialogue Box Close the Object Management window by clicking the button with X in the top right hand corner of the window Set the grid Once the PHOENICS satellite has been told what objects are present it sets a default computational grid This may or may not be satisfactory for computational accuracy Click on the Mesh toggle button to display the default mesh on the screen This shows subdivision in X direction but none in Y or Z because no indication has been given that variations in the latter directions exist Click anywhere on the image and the Gridmesh settings dialog box will appear The grid in all three directions is set to Auto To understand what this means click on the top right and then on the word Auto An explanatory screen will then appear In the present case Auto gives 20 cells in X 1 cell in Y and Z This does not give a very interesting picture therefore change the number of cells in Z direction to 15 To do so click on Z Auto button to switch to Manual mode and then type the proper number in the corresponding box Click on OK to close the dialog box The mesh will now be shown as blue and red

    Original URL path: http://www.cham.co.uk/phoenics/d_pc/htms/english/tutorial/tut1.htm (2016-02-15)
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  • TUTORIAL - Simulation of a Flow. Step 2.
    Click OK It is not necessary to set the domain size indicate for which variables solution is required and re size the domain because you did these already for the existing Q1 Introduce and edit the required objects Click on the object management button O on the toolbar or on the Control panel also sometime called hand set This will display the object management window with a list of objects containing DOMAIN INLET and OUTLET You will now introduce other objects walls and make necessary changes in the settings of the existing objects Introduce the WALL H object In the Object management dialog click on Object New and New Object Change name to WALL H which stands for high wall Click on Size and set SIZE of object as Xsize 2 0 Ysize 1 0 Zsize 0 05 Click on Place and set Position of object as Xpos 0 0 Ypos 0 0 Zpos 0 95 Click on General Select Type Blockage default to set an object of finite thickness To change the material click on Attributes click on Types click on SOLIDS then OK and then on ALUMINIUM at 27 deg C and OK Click on OK to exit the Attributes menu and on OK to close the Object Specification Dialogue Box WALL H will now appear in the Object Management list of objects Introduce the WALL L object Click on Object New and New Object Change name to WALL L which stands for low wall Click on Size and set SIZE of object as Xsize 2 0 Ysize 1 0 Zsize 0 05 Click on Place and leave default Position settings of object as Xpos 0 0 Ypos 0 0 Zpos 0 0 Click on General Define Type Blockage default Click on Attributes select material as ALUMINIUM as above Click on OK to return to the Object Specification Dialogue Box and on OK to close the Object Dialogue Box Introduce the WALL W object Click on Object New and New Object Change name to WALL W which stands for west wall Click on Size and set SIZE of object as Xsize 0 0 Ysize 1 0 Zsize 0 45 Click on Place and set Position of object as Xpos 0 0 Ypos 0 0 Zpos 0 05 Click on General Define Type Plate for an object of infinitesimal thickness Click on OK to close the Object Specification Dialogue Box Introduce the WALL E object Click on Object New and New Object Change name to WALL E which stands for east wall Click on Size and set SIZE of object as Xsize 0 0 Ysize 1 0 Zsize 0 45 Click on Place and set Position of object as Xpos 2 0 Ypos 0 0 Zpos 0 5 Click on General Define Type Plate Click on OK to close the Object Specification Dialogue Box Edit the INLET object In the Object Management window double click MY INLET in the object name list to open the Object Specification window Click

    Original URL path: http://www.cham.co.uk/phoenics/d_pc/htms/english/tutorial/tut2.htm (2016-02-15)
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  • TUTORIAL - Flow in a labyrinth
    Click on General Define Type Blockage default Click on Attributes select material as ALUMINIUM as above Set a HEAT SOURCE of 100 W Click on Adiabatic and select Fixed heat Flux Click on Value and enter 100 Click on OK to return to the Object Specification Dialogue Box and on OK to close the Object Dialogue Box Introduce the WALL E object Click on Object New and New Object Change name to WALL E which stands for east wall Click on Size and set SIZE of object as Xsize 0 0 Ysize tick To end Zsize tick To end Click on Place and set Position of object as Xpos tick At end Ypos 0 0 Zpos 0 5 Click on General Define Type Plate Note that a Plate differs from a Blockage in having zero thickness Click on OK to close the Object Specification Dialogue Box Introduce the WALL W object Click on Object New and New Object Change name to WALL W which stands for west wall Click on Size and set SIZE of object as Xsize 0 0 Ysize tick To end Zsize 0 5 Note that no position coordinates need to be given because the defaults 0 0 0 0 0 0 suffice in this case Click on General Define Type Plate Click on OK to close the Object Specification Dialogue Box Introduce the IN PLATE object Click on Object New and New Object Change name to IN PLATE which stands for interior plate Click on Size and set SIZE of object as Xsize 0 0 Ysize tick To end Zsize 0 65 Click on Place and set Position of object as Xpos 0 5 Ypos 0 0 Zpos 0 3 Click on General Define Type Plate Click on OK to close the Object Specification Dialogue Box Introduce the IN BLOCK object Click on Object New and New Object Change name to IN BLOCK which stands for interior block Click on Size and set SIZE of object as Xsize 0 4 Ysize tick To end Zsize 0 65 Click on Place and set Position of object as Xpos 1 0 Ypos 0 0 Zpos 0 05 Click on General Define Type Blockage default Click on Attributes then on Other materials select Solids then COPPER Click on OK to return to the Object Dialogue Box and on OK to close the Object Dialogue Box Introduce the INLET object Click on Object New and New Object Change name to INLET Click on Size and set SIZE of object as Xsize 0 0 Ysize tick To end Zsize 0 45 Click on Place and set Position of object as Xpos 0 0 Ypos 0 0 Zpos 0 5 Click on General Define Type Inlet Click on Attributes and set the velocity in X direction to 0 5 m s Leave the temperature at Ambient 20 degrees C for the inflowing air Click on OK to close the Attributes menu and on OK in the Object Specification Dialogue Box Introduce the

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/wrkshp1.htm (2016-02-15)
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