Web directory, archive
Search web-archive-uk.com:

Find domain in archive system:
web-archive-uk.com » UK » C » CHAM.CO.UK

Total: 682

Choose link from "Titles, links and description words view":

Or switch to "Titles and links view".
    which are displayed by clicking on here and here the first being the Q1 and the second the Q1EAR Thus a PATCH argument which in the original Q1 appeared as NX 2 will appear in Q1EAR if NX 20 simply as 10 Similarly the Q1EAR file is entirely free from any signs of the READVDU IF THEN ELSE ENDIF and other PIL constructs which gave rise to the settings The Q1EAR is created from the final state of the variables in Satellite memory and thus reflects the responses made to any READVDU statements in the Q1 Lines in the Q1 file between DISPLAY and ENDDIS and between PHOTON USE and ENDUSE are copied into the Q1EAR file The Q1EAR file if re named as Q1 can itself be read by the SATELLITE which will then produce an EARDAT which is identical in all significant respects to that which was produced in the previous SATELLITE run b Inspection of the Q1EAR file produced by a satellite run is useful because The Q1EAR contains precisely that information which is being conveyed to EARTH regardless of menu options READVDU answers or In Form statements have been provided to the SATELLITE It does so

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/q1ear.htm (2016-02-15)
    Open archived version from archive

  • Remote Computing Service - In2itive
    how to get started advice perform ready to run i e click only flow simulations perform simple flow simulating calculations for which they supply the input data work through selected tutorials e mail requests for assistance or advice to CHAM sign on for free try before you buy access to more complex cases visitors by appointment to watch and participate interactively in demonstrations of agreed beforehand features of PHOENICS communicating

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/remote.htm (2016-02-15)
    Open archived version from archive

    between the calculations and specially conducted experiments and field exercises will be presented This section begins with a number of comparisons with reliable laboratory and field measurements of a velocity fields and free surface elevations in two and three dimensional sections of open channels and river courses The applications for spill exercises for real natural river conditions will follow next 4 1 Free surface flows in open channels The number of sub and super critical free surface flows have been calculated Different bed shapes and plane geometries have been considered They include flow in an open turn around channel abrupt open channel expansion flow impingement on a blunt body spread of depth discontinuity merging of streams hydrailic jumps at the merging of streams flows in channels with complex bed shapes and meandering open channel flows The good agreement has been achieved both for free surface elevation and velocity distributions Pictorial extracts from the study now follow abrupt open channel expansion Blunt body in shallow water stream Open channel flow with varying depth bottom Open channel flow with varying depth width phoenics d polis d enc d pcx sv meand 4 2 Flows and oil slicks in a scaled river section The next step in validation program was to compare the measured velocity distributions with calculated profiles for the typical river situations presented by down scaled hydraulic models The example which follows next is for the scaled section of River Amur of Russian Far East The picture presents the calculated vector velocity field and water currents visualised by stream lines In most cases the overall agreement has proved to be good Hydraulic model of Amur River section A number of oil slick movement studies have also been carried out for scaled river models The photos of oil slicks at different time moments compared favourably with the locations and shapes of predicted slicks An example of the comparison will be shown on the next panel The scaled model in question is again the River Amur section just presented for velocity fields Oil slick spreading on Amur model 4 3 Water currents in natural rivers The considerable attention has been given for comparison model velocity fields with data of hydrological field measurements in real river conditions Two examples illustrate rather typical comparisons The simulated contours of velocity vector magnitudes for three cross sections of the reach of the Volga River s branch Volozhka are shown in next panel The model employed the three dimensional BFC option The numbers in the contour fields represent the field measurements Calculated velocity vectors are found to compare favorably with data obtained in the field for the conditions of summer flow in 1993 Volga River s branch Volozhka The two dimensional shallow water option has been used to calculate the flow currents in the section of the Kiya River of West Siberia see next panel for the summer flow disharge of 1994 To simulate the highly varying depth the coast line geometry the presence of dams and islands

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/enc_rosa.htm (2016-02-15)
    Open archived version from archive

  • The RSET command
    in the most uniform way ni must not be less than number of regions in the x direction likewise for nj and nk 2 RSET D Set the solution domain Format RSET D name dx dy dz icol idash name String of up to 8 alpha numerical characters name of the solution domain dx X size of the solution domain dy Y size of the solution domain dz Z size of the solution domain icol Colour index for displaying the solution domain idash Line type index for displaying the solution domain The Solution Domain is the space in which the Cartesian or polar grid is generated ie the grid must be contained within the Solution Domain The default Solution Domain is a 1 metre cube the default name of the Solution Domain is CHAM dx dy and dz must be greater than zero even for 1 or 2 D grids In a polar domain dx represents the total angle in radians The colour index varies from 1 to 15 on a colour screen the colour range is 1 for white 2 for dark blue 15 for red On a monochrome screen the colour index must be 1 Line styles vary from 0 to 4 with 0 for a solid line 3 RSET B Set an object Format RSET B name x0 y0 z0 dx dy dz icol idash name String of up to 8 alpha numeric characters the name of the object x0 X position of the low south west corner of the object y0 Y position of the low south west corner of the object z0 Z position of the low south west corner of the object dx X size of the object dy Y size of the object dz Z size of the object icol Colour index for displaying the object idash Line type index for displaying the object This command is used to define or modify objects An object can be either a three dimensional block or a two dimensional panel Any object must be defined within or on the boundary of the solution domain Dx dy and dz must be greater than or equal to zero Region boundaries are automatically created on or within a distance of the tolerance to the boundaries of an object see GRDPWR NREGX etc 4 RSET X Modify a region in X direction Format RSET X ireg ncell power set X grid in region ireg ireg the current region number ncell number of cells to be set in the region power the grid distribution power This command sets the grid distribution inside the specified region 5 RSET Y Modify a region in Y direction Format RSET Y ireg ncell power set Y grid in a region This command does for the grid in the y direction what RSET X does in the x direction 6 RSET Z Modify a region in Z direction Format RSET Z ireg ncell power set Z grid in a region This command does for the grid

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/rset.htm (2016-02-15)
    Open archived version from archive

  • RSG1.HTM
    is included in both SATELLITE and GROUND Fortran namely satgrd The common block RSG which is dimensioned in main htm has 150 elements but as will be seen many of them have other names than RSGx These variables have in the course of time become PIL variables used for well established purposes For example BUOYA BUOYB BUOYC BUOYD and BUOYE are used in various formulae for buoyancy forces and RSG10

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/rsg1.htm (2016-02-15)
    Open archived version from archive

    Variable New modifed ISOLX ISOLY ISOLZ New ISOLBK New IVARBK New TRACE New NODEF New NOCOMM New NOCOPY New Q1QUIT New DMPSTK New DARCON Mew FIXFLU Value changed FIXVAL Value changed ITABL Default value changed ORSIZ Default value changed NPLT Default value changed Variables declaring in PIL see CHAR REAL INTEGER BOOLEAN Variables maximum values of see VARMAX Variables minimum values of see VARMIN Variables solving of see SOLVE Variables specification of see RESTRT Variables storing and solving of see SOLUTN Variables storing of see STORE VARMAX PIL real array group 18 default 1 E10 If VARMIN phi is greater than or equal to its default value namely 1 E10 VARMAX phi sets the maximum value which the variable phi may have anywhere in the domain If however VARMIN phi is less than its default value VARMAX phi is the maximum absolute value of the increment of phi at any updating stage VARMIN PIL real array group 18 default 1 E10 If VARMIN phi is greater than or equal to its default value namely 1 E10 it is the minimum value allowed to variable phi anywhere in the domain If however VARMIN phi is less than its default value it

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/var.htm (2016-02-15)
    Open archived version from archive

  • MODELS IN PHOENICS 4 Models which avoid the EVH 4 1 REYNOLDS stress turbulence model also referred to as RSTM Contents Introduction Reynolds stress model equations Reynolds flux model equations Boundary and initial conditions Activation of the model Convergence advice

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/turmod/enc_tu41.htm (2016-02-15)
    Open archived version from archive

  • The 7-gases option for combusting gas mixtures
    mixture states which exist anywhere in the chamber lie somewhere along the straight line between point CxHy and point O on Fig 1 Then the local fuel air ratio is equal to the ratio of line lengths O to M M to CxHy Further the mixture fraction which is used as a solved for variable in many SCRS ie Simple Chemically Reacting System cases in the PHOENICS Library varies linearly along that line from 0 0 at O to 1 0 at CxHy When there are two fuel supply streams each having a different carbon to hydrogen ratio and therefore being represented by a different CxHy point on the base line of Fig 1 then all mixture states within the combustion chamber are represented by points lying within the triangle having the vertices O CxHy1 and CxHy2 There may of course be several inlet streams and they may all have different compositions When there are n sources of supply of gas phase material it is best to solve for n 1 conservation equations for variables which might be named MXF1 MXF2 MXF3 and then to deduce the elemental mass fractions of carbon oxygen and hydrogen from FC sum FC1 MXF1 FC2 MXF2 FCn MXFn where FC1 elemental carbon content of supply stream 1 FC2 elemental carbon content of supply stream 2 etc sum MXF1 MXF2 MXFn 1 0 and transfer of material from a second phase into the first also counts as a supply stream with similar expressions for FH and FO However they are computed it is the values of FC FO and FH which dictate the relative proportions of O2 CO2 CO H2O H2 CxHy treated as one material and FN in the gaseous equilibrium mixture Wood and char When the wood and char mass fractions which are always regarded as belonging to phase 1 are subtracted the elemental mass fractions of the gaseous part are obtained viz GO GC and GH These sum to 1 FN Species mass fractions begin with Y e g YCO2 if they relate to the whole of phase 1 and with Z e g ZCO2 if they relate to the gaseous part only The diffusion coefficients of the gaseous species are all taken as equal as are the specific heats and the reaction rates are diffusion limited As a consequence all species concentrations depend in piecewise linear fashion on the elemental mass fractions The values of oxygen fraction FO at which the formulae exbibit discontinuities of slope are called FOPART where the oxygen has consumed part of the fuel so as to create CO and H2 and FOFULL where the products of combustion are CO2 and H2O Both these are calculated from the user supplied values of CINCL the mass fraction of C in the fuel set via RHO1A or RHO2A HINCL the mass fraction of H in the fuel set via RHO1B or RHO2B CINWD the mass fraction of C in the wood set via SPEDAT HINWD the mass fraction of

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_enc/7gases.htm (2016-02-15)
    Open archived version from archive

web-archive-uk.com, 2016-10-24