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  • Encyclopaedia Index Inter phase transfer processes and properties Editing and adding

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_lecs/plant/ph_intps.htm (2016-02-15)
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  • Encyclopaedia Index Properties of the medium Editing and adding

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_lecs/plant/ph_propr.htm (2016-02-15)
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  • Boundary coditions and sources
    Boundary coditions and sources Encyclopaedia Index Boundary conditions and special sources Editing and adding

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_lecs/plant/ph_sourc.htm (2016-02-15)
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  • Open-source Fortran files
    embedding PLANT the automatic Fortran code creator Simultaneous solid stress analysis c Special purpose programs HOTBOX FLAIR ESTER CVD The open source Fortran files of the PHOENICS core concerned with General organization of the calculations are GROUND the frame work subroutine into which users can introduce their own coding either directly or by way of PLANT GREX3 an exemplary GROUND which activates many of the sub routines in the following files Material properties in the order in which they are referred to in the PROPS file Density The Fortran file gxdens The options 1 2 3 4 5 6 7 8 9 The subroutines density slbden iniden setden Viscosity The kinematic viscosity file gxknvsl The options 1 1 2 3 4 5 6 7 8 9 0 The subroutines KINVISL SLBVSL INIVSL SETVSL gxspehe for the specific heat capacity and gxtempr for the related coding which deduces the temperature when this is not a directly solved for variable gxprndtl for the laminar prandtl number or thermal conductivity gxthrmx for the thermal expansion coefficient gxdrdp for compressibility and also gxprutil for associated utility subroutines Turbulence gxknvst for turbulent effective kinematic viscosity gxmxlen for length scale of turbulence gxturb for turbulence energy generation gxgenk for further subroutines use in the calculation of energy generation gxwall for turbulent wall functions Sources other than those of turbulence energy gxbuoyso for sources of momentum induced by buoyancy gxrotaso for sources of momentum induced by rotation of coordinates gxchemso for sources of chemical species resulting from reaction gxradiat for sources associated with radiation gxmiscso for miscellaneous sources gxblin for sources associated with the WIND PROFILE object gxio for sources associated with ANGLED IN and ANGLED OUT objects gxfire for sources associated with the FIRE object gxswfan for sources associated with the FAN object in swirl mode

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/d_gxfils/gxfiles.htm (2016-02-15)
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    occur five phases have to be considered It would of course be possible in principle to generalise the two phase coding in PHOENICS so as to enable it to handle as many phases as may be present However this would be a large undertaking which would significantly increase the size of the executable with attendant problems regarding economy mantenance etc This route has therefore not been followed The MUSES technique has proved to be a simple and economical alternative 2 The Solution The essential idea is having once provided a grid which covers the volume of space in question to provide one or more extra grids covering the same volume and on each of these to solve for different variable For a heat exchanger for example the first grid might be devoted to shell side fluid a second grid to the tube side fluid and a third to the metal Of course the values of the variables on any one grid must be allowed to depend on the values of different variables on any other grid For example the metal temperature in a heat exchanger is influenced by and in turn influences the temperatures of the two fluids These mutual influences usually take the form of sources and sinks of which PHOENICS is well able to compute the magnitude and evaluate the effects This is particularly easy when the PLANT method is employed for the user has then only to insert the formulae expressing those sources allowing the coding to be created automatically 3 Examples of use One of the first examples of the use of MUSES is to be described in the section of the PLANT library to be found by clicking here MUSES is also extensively exploited in the SAFIR special purpose version of PHOENICS which is used

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/muses.htm (2016-02-15)
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    embodies a computer model of flow of gas liquid and solid heat and mass transfer phase change and chemical reaction in a blast furnace into which is injected air possibly enriched with coal or oil Links Technical report Application Album

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_spp/safir/safir.htm (2016-02-15)
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  • cfd cham PHOENICS simuserve info
    spills in rivers SAFIR Blast furnaces TACT Natural draft cooling towers HOTBOX HOTBOX is a version of PHOENICS which has been customised for the simulation of the flow of heat and air or other coolant in electronics equipment It differs from other commercially available software packages serving similar purposes in the following respects it allows electronics cooling problems to be set up by way of an easy to use virtual reality user interface the input to which may be the output from an industry standard CAD package it allows fine details of the geometry to be accurately handled by the embedding of fine computational grids around them it employs the unique and economical LVEL method of simulating the low Reynolds number turbulence which characterises electronics equipment it employs the unique and economical IMMERSOL method of simulating the surface to surface radiative heat transfer which plays an important role in evening out the temperatures within electronics equipment because it can draw on all the capabilities of the PHOENICS solver it can compute the displacements stresses and strains which are caused by the non uniformities of temperature and which may influence the performance or the life of the equipment for the same

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_info/spp.htm (2016-02-15)
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    in the whole field the mass average value of a variable over the whole field normalised and power lawed values of a particular variable how the total number of commands is indicated These capabilities will now be discussed one by one by reference to the commands which must be placed in the Q1 file how the print out appears in the RESULT file and the lines of coding in GREX3 which the commands activate a The value of a particular variable Core input library case 340 contains the following almost self explanatory lines the commands to print the value of v1 prevailing at ix nx 2 iy ny 2 iz 1 SPEDAT PRINT COMMAND5 C VALUE V1 SPEDAT PRINT IXLOC I NX 2 SPEDAT PRINT IYLOC I NY 2 SPEDAT PRINT IZLOC I 1 It is what follows VALUE in the fourth argument of the first line and the contents of the fourth arguments of the three following lines which determine what is printed The print out which actually appears in the result file is as follows for case 340 with nx 10 and ny 10 Spedat print command is VALUE V1 At ix 5 iy 5 and iz 1 variable V1 has the VALUE 5 154015E 03 The coding in group19 of GREX3 which produces this output is as follows ELSEIF MOD ISTEP NTPRIN EQ 0 THEN CALL WRIT40 Spedat print command is command IF ELSEIF COMMAND 1 5 EQ VALUE THEN CALL GETSDI PRINT IXLOC IXLOC CALL GETSDI PRINT IYLOC IYLOC CALL GETSDI PRINT IZLOC IZLOC CALL GETVAL COMMAND 7 10 IXLOC IYLOC IZLOC ENDIF ENDIF b The maximum and minimum values of a variable Core input library case 340 contains the following lines the command to print the minimum and maximum values of u1 SPEDAT PRINT COMMAND3 C MINMAX U1 Evidently it is what follows MINMAX in the fourth argument of SPEDAT which indicates the variable in question and this time there is no need to specify a location for where the minimum and maximum values are to be found will be worked by EARTH The print out appears as follows in the RESULT file Spedat print command is MINMAX U1 hilo3d called for U1 Highest lowest values of U1 highest 3 913156E 02 lowest 3 992829E 02 ixhigh 4 iyhigh 8 izhigh 1 ixlow 6 iylow 3 izlow 1 The coding in GREX3 which produces it is as follows ELSEIF COMMAND 1 6 EQ MINMAX THEN CALL WRIT40 hilo3d called for COMMAND 8 11 CALL HILO3D LBNAME COMMAND 8 11 CALL WRITBL Users accustomed to performing their own Fortran coding may care to note that HILO3D LBNAME name of 3D stored variable is available for inclusion in their own coding c The total amount of a variable in the whole field Core input library case 340 contains the following lines the command to compute the total of temperature SPEDAT PRINT COMMAND1 C TOTAL TEMP Evidently it is what follows TOTAL in the fourth argument of SPEDAT

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