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  • In-form6.htm
    be explained below What must first be described however is how In Form objects are actually created Object creation In Form objects are created by means of statements of the following format INFOB at PATCHNAME is Formula with INFOB N Here INFOB is a keyword which indicates what is to follow PATCHNAME is the name of a patch defined by a preceding in the q1 file PATCH statement which defines the limits in terms of ixf ixl iyf iyl izf izl itf and itl within which the object may exist N is the index number of the object and formula is a character string which defines the shape and position of the object in space and time The INFOB statement acts by tagging the cells of which the centre lies within the object recording at the same time which object is in question Additionally and optionally if it is desired to indicate these cells via the RESULT file or PHOTON display a 3D stored variable usually but not necessarily called MARK is also given the infob index as its value To ensure this the INFOB statement needs to be preceded by one such as STORED of MARK at PATCH1 is 1 0 with INFOB 1 which ensures that the variable MARK is indeed stored and that the value 1 0 is assigned to it in cells which are to be regarded as part of INFOB object number 1 Is an INFOB PATCH a bounding box VR objects have bounding boxes These are the smallest volumes which can be defined by grid aligned surfaces into which the object will fit The patch associated with an In Form object however is usually larger than would be the bounding box of the cells comprising the objects It is the volume within which such cells may exist but it is rare for any of these cells to touch the bounding surfaces of the patch In one sense the INFOB PATCH is unnecessary for if the PATCH were always defined as the whole domain the effects of the object would be the same However its existence acts as an economy measure it tells PHOENICS where searching for parts of the object would be a waste of time That each In Form object should have a distinct PATCHNAME is important for it is this which is used rather than INFOB 1 INFOB 2 etc when initial values and sources are ascribed New functions Two special functions namely BOX and SPHERE are used in the formulae which follow the INFOB keyword These may create directly objects having the shapes suggested by their names but with appropriately devised arguments they may also be used for the creation of objects of much more complex shape It should be noted that both these functions can be used with cylindrical polar and body fitted coordinate grids as well as cartesian ones In the last respect they are superior to Virtual Reality objects for the latter can not be used with BFCs

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/in-form6.htm (2016-02-15)
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  • In-form9.htm sections 9, 10, 11
    solver which is where the corrections are computed may not have been entered The cure is to set NPRINT to some value well below that of the number of sweeps at which solution terminated Exchange coefficients gammas Also of interest to those who study the workings of the numerical solution process are the exchange coefficients i e diffusivities times densities which enter together with convection contributions into the calculation of aN aS aE aW etc These too may be accessed by way of an In Form statement which is in this case STORED of name is GAMM varname This feature is illustrated in case 788 Manipulating the coefficients etc Like other 3D stored variables the coefficients and other quantities mentioned in the present section may be given initial values via FIINIT confined between upper and lower values by way of VARMAX and VARMIN and relaxed via RELAX name LINRLX factor These possibilities give the user great power to intervene if he or she wishes in the solution process 9 4 Eliciting debug In Form is supplied with extensive debug facilities for the investigation of suspected errors These facilities are activated by use of the read Q1 facility Specifically the Q1 file is supplied with starting in column 3 or greater the starting line infrbegin a second line debug t a succession of further lines of the kind feature t or feature f where feature is one of the list given below concluded by the finishing line infrend The full list of features is FULL for all the following FORMULA for displaying the formula being parsed INITIAL for initial value settings STORED for stored value settings MAKE for the MAKE facility PROPERTY for property settings SOURCE for sources LINE for linearization aspects XGRID for grid related settings YGRID ZGRID TGRID INFOB for In Form objects MOFOR for moving objects As is obvious debug of a particular kind is activated when t follows the feature name and deactivated by f An f following debug deactivates all debug features All debug features are f by default In Form debug print out is governed by the same indices as is the older established debug from EARTH i e that elicited by the PIL variable debug namely izdb1 izdb2 etc Library case case 768 provides an example 9 5 Tabular Output In Form can produce tabular output in comma separated variable format to named files A new line can be written at the end of each sweep or at the end of each time step The values written to the files can be the outcome of any In Form formula There is no limit to the number of files Syntax The command to produce a sweep wise table file is TABLE in file name is GET form1 form2 formn with HEAD head1 head2 headn SWEEP The command to produce a time wise table file is TABLE in file name is GET form1 form2 formn with HEAD head1 head2 headn TIME where file name is the name of the file to be created If the filename is given the extension csv it will be directly recognised by Excel The GET function retrieves the values of form1 formn and writes them to the table file There is no limit on the number of variables that can be written form1 formn represent any valid In Form construct They can be single real values elements of an array the evaluation of a formula whatever is required The HEAD function supplies the column headers to be written to the first line of the table For example adding the line TABLE in monplt1 csv is GET P1 1 3 3 P1 NX 3 3 P1 1 3 NZ 5 with HEAD P1 1 P1 2 P1 3 SWEEP to library case 274 produces the file monplt1 csv which contains ISWEEP P1 1 P1 2 P1 3 1 0 000000E 00 0 000000E 00 0 000000E 00 2 7 819997E 01 6 381281E 01 1 904133E 01 3 9 748657E 01 7 934592E 01 3 729689E 00 4 9 297382E 01 7 512841E 01 2 528054E 01 5 8 867683E 01 7 146969E 01 3 346389E 01 6 8 672485E 01 6 953475E 01 4 156276E 01 7 1 030840E 02 8 589959E 01 8 495282E 01 8 1 524511E 02 1 357139E 02 1 641428E 02 195 4 161576E 02 3 990614E 02 3 937202E 02 196 4 161576E 02 3 990614E 02 3 937201E 02 197 4 161576E 02 3 990614E 02 3 937201E 02 198 4 161576E 02 3 990614E 02 3 937201E 02 199 4 161576E 02 3 990614E 02 3 937202E 02 200 4 161576E 02 3 990614E 02 3 937202E 02 This can then be easily imported to Excel The data can be plotted as a Scatter chart to produce a convergence plot like this The files themselves are written at the end of each sweep or each timestep so that should the run crash for any reason the data up to that point will be available It is also possible to look at the files during the run to see how it is getting on If something looks out of order the run can be stopped and investigated Back to main contents 10 Replacing READQ1 a REALREAD INTREAD and LOGREAD The READQ1 features of PHOENICS allow variables which do not form part of the PIL set to be transmitted to EARTH However each variable requires one extra line to be inserted in the Q1 file In Form allows up to 20 variables to be transmitted in a single line possibly with continuation effected by the sign by means of the REALREAD INTREAD and LOGREAD statements Their use is illustrated by the facility introduced with PHOENICS 3 5 for changing turbulence model constants which is described here Suppose for example it were desired to employ the different constants CMU 0 6 CD 0 2 C1E 1 5 C2E 1 92 AK 0 4 EWM 9 0

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/in-form9.htm (2016-02-15)
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  • AC3D - 3D Graphics Modeller
    editing of complicated scenes Built in fast OpenGL 3D renderer with adjustable field of view instantly see results of your actions in 3D Spin the model or switch into walk mode for Quake style control Headlight and up to 7 other positionable lights 24 bit colour palette with adjustable diffuse ambient emissive specular shininess and transparency Texture mapping support with real time rendering Configurable to use external renderers such as Povray and BMRT just select Tools Render to start Plugin interface registered versions only with source code for existing plugins and a software development kit Modelling features Adjustable 2D and 3D grid guide lines with grid snap function Edit at different granularity groups objects vertices Full polygon editing Not just spheres cubes etc make a sphere and move the points vertices to deform the shape Manipulate individual surfaces insert remove vertices make holes spike spline bevel triangulate flip group into new objects Create new surfaces objects around any selection Convex hull Extrude and revolve 2D lines to make 3D shapes Scale a selection to a specific size Flip a selection mirror about X Y or Z axis Optimize duplicate vertices and surfaces File formats Simple documented file formats allow easy conversion from other forms of data ideal for visualizing your own data in 3D Supports many output input formats including 3D studio Lightwave Alias triangle DXF VRML1 and 2 and Inventor Povray RIB Triangles Direct X via plugin AC3D and PHOENICS Purpose of AC3D for PHOENICS Users The creation of facetted objects representing the various elements of the flow geometry Modification of exisiting geometries change shape and or colour Repair of existing CAD geometries General Rules for Creation of Faceted Objects Object must be 3D even if it is to be used as a 2D object in PHOENICS All normals

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_info/ac3d/ac3dlec.htm (2016-02-15)
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  • Supplied STL Files
    stl phoenics d intfac d cadpho d stl design 2 r6 stl phoenics d intfac d cadpho d stl finject stl phoenics d intfac d cadpho d stl grandprix stl phoenics d intfac d cadpho d stl jaguar f stl phoenics d intfac d cadpho d stl pipes stl phoenics d intfac d cadpho d stl r6 f1 car template stl phoenics d intfac d cadpho d stl screw stl

    Original URL path: http://www.cham.co.uk/phoenics/d_intfac/d_cadpho/d_stl/list.htm (2016-02-15)
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  • TR326: VR Editor Handset
    the Action menu of the Object Management dialog or the Options tab of the Object dialog Main Menu or on the toolbar This leads to the Top panel of the Main menu The Main menu is used to make all the domain related settings The main menu panels are described in VR Editor Main Menu The Main Menu can also be reached from Settings Domain attributes on the Top Menu bar Object Management or on the toolbar This leads to the Object Management dialog box This is fully described in VR Editor Object Management Duplicate Object or Group If the current selection is a single object then it and all its attributes type geometry rotation etc will be duplicated at the same position as the original If a group of objects is selected the entire group will be duplicated See VR Editor Object Management Object Menu for a more detailed description Duplicate using Array The selected object or group of objects can be duplicated a given number of times in each co ordinate direction with a given spacing See VR Editor Object Management Object Menu for a more detailed description Delete object This will delete the currently selected object or group If no object or group is selected the Object Management dialog box listing all the objects is shown The objects can now be selected for deletion by highlighting from the list The deletion list can be confirmed or modified before the deletion takes place Note that objects cannot be undeleted See VR Editor Object Management Action Menu for a more detailed description X Y Z Position Up Down These buttons move the origin of the bounding box of the currently selected object in the three co ordinate directions See VR Editor Object Dialogs Object Place Page for more details It is possible to double click on the data entry boxes next to the up down button and type in exact values This is equivalent to double clicking on an object and entering the positions in the Object Dialog Box Place panel In a cylindrical polar system the X direction position is always the angle q set in radians and the Y direction position is the radius r set in metres In a Body Fitted BFC system the object positions are specified in terms of cell corners in the I J and K directions The origin of the grid is at 0 0 0 If more than one object is selected these buttons move the first object to be selected All the other selected objects are moved by the same amount thus keeping the relative positions constant If one or more of the selected objects are constrained by the domain movement will stop when any object touches the domain boundary If they are all not constrained they can be moved at will through the domain boundaries If no object is selected these buttons move the probe To see which cell the probe is in right click on the Axis Toggle View Options button and turn Show Cell Position on The probe cell location will be displayed in the bottom right corner of the graphics screen Alternatively double click on the probe to bring up a dialog from which the probe position can be changed X Y Z Size Up Down These buttons change the size of the rectangular bounding box of the currently selected object See VR Editor Object Dialogs Object Size Page for more details It is possible to double click on the data entry boxes next to the up down button and type in exact values This is equivalent to double clicking on an object and entering the sizes in the Object Dialog Box Size panel Note that the display is not updated until after either a click into the next input box or into the graphics image In a cylindrical polar system the X and Y direction sizes are set as follows Geometry name X Size Y Size Any geometry with file name starting POL all the default geometries d q radians dr metres All others dx metres dy metres The effect of this is that default geometries such as POLCUB DAT will bend to follow the grid whereas non default geometries such as WEDGE1 DAT or any CAD geometry will retain their correct shape IMAGE Default and non default geometries in a polar grid For further information see VR Object Dialog Object Size Page In a Body Fitted BFC system the object sizes are specified in terms of cell numbers in the I J and K directions If no object is selected these buttons will change the size of the domain The size of a BFC domain cannot be changed from here Zoom in Move Forward The left mouse button operates Zoom In the right mouse button operates Move Forward Zoom In is equivalent to increasing the zoom factor in a camcorder Move Forward is equivalent to moving the camera nearer the subject whilst retaining the same zoom factor Zoom Out Move Backward The left mouse button operates Zoom Out the right mouse button operates Move Backward Zoom Out is equivalent to decreasing the zoom factor in a camcorder Move Backward is equivalent to moving the camera further away from the subject whilst retaining the same zoom factor View Left Move Left The left mouse button operates View Left and the right mouse button operates Move Left View left is equivalent to rotating the image clockwise about a vertical axis whilst Move Left is equivalent to moving the viewpoint horizontally to the left i e the image appears to move to the right View Right Move Right The left mouse button operates View Right and the right mouse button operates Move Right View Right is equivalent to rotating the image anti clockwise about a vertical axis whilst Move Right is equivalent to moving the viewpoint horizontally to the right i e the image appears to move to the left View Up Move Up The left mouse

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_docs/tr326/vr-edit.htm (2016-02-15)
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  • WORKSHOP - CAD Import: Importing and Repairing STL Files
    Change the No next to Take size from CAD file to Yes In the STL file the co ordinates are given in millimetres but we want to work in metres Enter 0 001 in the Geometry scaling factor entry box Click OK The converted geometry file will now be read in The size of the new object will be set to 858m 693m 234m at 0 0 0 0 0 0 Click OK to close the Object specification dialog On the toolbar click the down arrow next to and select Fit to window The screen should look like this Checking for Obvious Errors Click on Domain in the Object management Dialog or click on the image background to release the highlighted object Click Settings Near Plane Reset to ensure the image appears correctly Using the mouse rotate pan and zoom the image to inspect the geometry Details of the mouse operation are given in TR 326 VR Editor Hand Set Mouse Control You should be able to find this peculiarity The dark building to the left of the wheel appears inside out from whatever angle it is viewed from To help diagnose the problem click View Show backs of objects This tells VR Editor to draw both sides of each facet not just those facing outwards The image should change to The inside out part now looks correct This is a good indication that the facets of the affected region are pointing in the wrong direction Repairing the error The utility program FacetFix can be used to repair many common errors in geometry files To start FacetFix click Run Utilities FacetFix The FacetFix GUI should appear Click Browse for input change file type from STL to DAT select complete dat and click Open Click Run FacetFix After a short while the FacetFix dialog will close indicating that the repair is finished To open the corrected geometry file double click on the buildings in the main graphics window This will open the Object specification dialog Go to the Shape page Click complete next to Geometry In the file browser browse to the current working director by default phoenics d priv1 Check that Files of type is set to All files Select complete 0 dat and click Open On the next Geometry Import dialog just click OK as we are only replacing the geometry for the existing object Click OK to close the Object Specification dialog The screen should now look like This should now not change when View Show backs of objects is turned on and off indicating that all the facts do indeed point outwards The colours in the image have been introduced by FacetFix It has used a different colour for each closed volume it has found in the original data set Checking for Detection Problems Having imported the geometry it is worth checking to see if it will be detected properly by the Earth solver Do do this we need to set a mesh and perform 2 or

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/cadimprt/stl1.htm (2016-02-15)
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  • Object-related Q1 settings for FLAIR HVAC-specific Object Types
    1 2 above The fire object can generate the following Q1 settings in addition to the standard size and position settings Pre ignition temperature OBJ PRE TEMP Tpre where Tpre is the temperature of the combusting material before combustion The units are degrees C Mass source OBJ MASS SOURCE form where form is one of Heat related Fixed Rate Pool Fire Piece wise Linear in time From table file Fixed Rate Mass Source value OBJ FXD MASS M where M is the constant mass source for the object in kg s Pool fire settings OBJ BETA B OBJ COEFA a OBJ COEFB b OBJ COEFC c where the fire area grows with time according to Area a b t c and the mass release grows as Mass Area 1 exp B Area 5 Piecewise Linear with Time settings OBJ MSEG i ti Mi where i goes from 1 to the number of segments 1 ti is the time at the start of the segment and Mi is the mass release rate in kg s for the object at time ti The last MSEG line sets the time and mass release at the end of the last segment From table file settings OBJ MASS FILE file name where file name is the name of the file containing the table of values Heat Source OBJ HEAT SOURCE form where form is one of Mass Related Fixed Temp Fixed Power Linear with Temperature Power of time Piece wise Linear in time From table file Fixed Temperature Value OBJ FXD TEM Tfix where Tfix is the fixed temperature in degrees C Fixed Power Value OBJ FXD FLU Qfix where Qfix is the constant heat release rate in W Linear with Temperature settings OBJ COEFFS a b OBJ LIMITS Tmin Tmax where the heat source in Watts for each cell within the object is Q a b min Tmax max T TEMP0 Tmin Power of Time settings OBJ COEFFS a b OBJ QMAX Qmax where the heat source in Watts for each cell within the object is Q max Qmax a t t 0 b where t is the time in seconds and t 0 is the time at the start of the fire Piecewise Linear with Time settings OBJ QSEG i ti Qi where i goes from 1 to the number of segments 1 ti is the time at the start of the segment and Qi is the heat release rate in Watts for the object at time ti The last QSEG line sets the time and heat release at the end of the last segment From table file settings OBJ HEAT FILE file name where file name is the name of the file containing the table of values Scalar Source OBJ SCALAR SOURCE form where form is one of Mass Related Heat Related Fixed Value Inlet value of scalar OBJ INLET scal val where scal is the name of the scalar and val is its value There will be one such line for

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_docs/tr313/q1set.htm (2016-02-15)
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  • TR326: Introduction
    A desktop icon labelled PHOENICS VR is also provided which starts the VR Editor directly When started with a script from a command window PHOENICS will start in the folder the command was issued from When started from the desktop icon PHOENICS will start in the folder which was being used as the working directory at the end of the last run By default the working directory is set to phoenics d priv1 Unix The command runsat followed by an optional argument will start the Satellite The argument can be as for Windows The commands vre and vrv will start Satellite in VR Editor mode and VR Viewer mode respectively No icons are provided The PHOENICS Commander The PHOENICS Commander is common to Windows and Unix It provides access to All PHOENICS modules Online help Tutorials Application examples Image The PHOENICS Commander The Commander is started with the command line command pc on Windows and Unix or from the Windows desktop icon labeled PHOENICS Commander Applicability Chapter 2 3 4 5 and 14 refer specifically to PHOENICS on Windows On Unix systems The VR Editor hand set described in Chapter 3 is replaced by a virtual hand set to the right of the VR Editor screen The Object Management Dialog described in Chapter 4 and the multi page Object dialog described in Chapter 5 are replaced by a single Object Attributes dialog Similarly the VR Viewer hand set described in Chapter 14 is replaced by a virtual hand set to the right of the VR Viewer screen The buttons themselves have the same icons and perform the same functions as those described in Chapters 3 and 14 Chapters 1 and 6 13 refer equally to PHOENICS VR on all systems The VR Environment Screen Layout under Windows The images below show the layout of the PHOENICS VR Environment At the top of the main window is the Top Menu bar starting File Settings etc Immediately below that is the Tool Bar containing standard icons for file manipulation Under the main graphics window is the Status bar showing the current working directory Image The Main Graphics Window To the right of the graphics window is the hand set which is used to control the display and to bring up further menus Beneath the hand set is the Satellite Command Prompt also known as the Text Box This is used to display any messages produced during the processing of the current input file If the input file contains an interactive question and answer session an input box appears at the bottom of the Command prompt screen and responses should be typed in to it Text appearing in the Command prompt is also echoed to a file named satlog txt in the current working directory Error messages are also written to satlog txt The images shown come from the first example in CHAM TR 324 Starting with PHOENICS VR Getting Help The most comprehensive source of on line information in PHOENICS is the

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_docs/tr326/intro.htm (2016-02-15)
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web-archive-uk.com, 2017-12-11