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PHOENICS User Meeting 2006 PHOENICS Today PHOENICS 2006 December Computer Simulation of Fluid Flow, Heat Flow, Chemical Reactions and Stress in Solids.

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Presentation on theme: "PHOENICS User Meeting 2006 PHOENICS Today PHOENICS 2006 December Computer Simulation of Fluid Flow, Heat Flow, Chemical Reactions and Stress in Solids."— Presentation transcript:

1 PHOENICS User Meeting 2006 PHOENICS Today PHOENICS 2006 December Computer Simulation of Fluid Flow, Heat Flow, Chemical Reactions and Stress in Solids.

2 PHOENICS User Meeting 2006 PHOENICS Today Contents This presentation shows some of the new features in PHOENICS 2006 The talk is in four parts: –Pre-processor (VR-Editor) –Post-processor (VR-Viewer) –Solver (Earth) –General improvements (common to all modules) –Special Purpose versions

3 PHOENICS User Meeting 2006 PHOENICS Today An auto meshing feature has been added. For most cases the Editor will generate a reasonable grid with little or no user input. The grid distribution is based on a maximum cell size (as a fraction of the domain size), and a maximum change in cell size across region boundaries. VR Editor Improvements

4 PHOENICS User Meeting 2006 PHOENICS Today The default grid can then be easily refined VR Editor Improvements

5 PHOENICS User Meeting 2006 PHOENICS Today The treatment of Polar geometries has been significantly updated. As a reminder, in polar co-ordinates –X is θ, the angle (in radians!) –Y is r, the radius –Z is z, the axial distance. VR Editor Improvements

6 PHOENICS User Meeting 2006 PHOENICS Today For objects using the default 'polcu' geometries, the size is set in (dθ,dr,dz) and position in (θ,r,z) as before. For non-'polcu' geometries, including STL imports, the size is in Cartesian (dx,dy,dz), but position is still in (θ,r,z). VR Editor Improvements

7 PHOENICS User Meeting 2006 PHOENICS Today As the Cartesian size is used, the shape and size of the object are preserved with no distortion. VR Editor Improvements

8 PHOENICS User Meeting 2006 PHOENICS Today This allows us to use more suitable grids… VR Editor Improvements

9 PHOENICS User Meeting 2006 PHOENICS Today The treatment of INLET objects in Polar co-ordinates has been improved. The inflow can now be specified as: –Cartesian velocity components –Polar (grid-directed) velocity components –Volumetric flow rate –Mass flow rate VR Editor Improvements

10 PHOENICS User Meeting 2006 PHOENICS Today VR Editor Improvements

11 PHOENICS User Meeting 2006 PHOENICS Today VR Editor Improvements The 'Slide velocity' can be set for blockages as well as for plates. By setting the surface velocity, a range of cases involving steady movement can be treated as steady-state.

12 PHOENICS User Meeting 2006 PHOENICS Today VR Editor Improvements In Cartesian co-ordinates, the 'Spin' option sets the surface velocity as if the object were rotating about its axis.

13 PHOENICS User Meeting 2006 PHOENICS Today VR Editor Improvements In Polar co-ordinates, the slide velocity can be in m/s or radians/s.

14 PHOENICS User Meeting 2006 PHOENICS Today Heat-transfer between the blockage and the surrounding fluid is controlled by the blockage external heat-transfer coefficient. VR Editor Improvements By default, this is obtained from the wall- functions. Alternatively, a user-set constant value can be supplied.

15 PHOENICS User Meeting 2006 PHOENICS Today A new object type TRANSFER has been introduced. It allows the outflow from one solution to be used as the inflow to another. VR Editor Improvements

16 PHOENICS User Meeting 2006 PHOENICS Today INLET and OUTLET objects can also be tagged to act as Import or Export TRANSFER objects Only the shape of the Import/Export object needs to be the same between runs – the grid does not need to be identical The data to be transferred is held in an ASCII text file VR Editor Improvements

17 PHOENICS User Meeting 2006 PHOENICS Today The new object types ANGLED-IN and ANGLED-OUT have been introduced. These allow inlets and outlets of any arbitrary shape to be placed on the outer surface of any arbitrarily-shaped blockage. The area of action is the area of intersection between the object and any blockage. VR Editor Improvements

18 PHOENICS User Meeting 2006 PHOENICS Today VR Editor Improvements

19 PHOENICS User Meeting 2006 PHOENICS Today A new object type ASSEMBLY has been introduced. The assembly object acts as a container for any number of other objects, which go together to make a component. Objects are added to an assembly object through the Hierarchy dialog. VR Editor Improvements

20 PHOENICS User Meeting 2006 PHOENICS Today Components can be added or removed from an assembly VR Editor Improvements

21 PHOENICS User Meeting 2006 PHOENICS Today All size and position changes made to the assembly object are also applied to all the components. VR Editor Improvements

22 PHOENICS User Meeting 2006 PHOENICS Today All the objects in the assembly can then be exported to a single file. VR Editor Improvements

23 PHOENICS User Meeting 2006 PHOENICS Today The saved assembly objects can then be imported into another model. VR Editor Improvements

24 PHOENICS User Meeting 2006 PHOENICS Today Objects can be partially pushed out of the domain, to allow: –Solution over one half of a body, or –Solution over any part of a large STL VR Editor Improvements

25 PHOENICS User Meeting 2006 PHOENICS Today The Editor can output the entire geometry in TECPLOT format. VR Editor Improvements Each object is shown in TECPLOT as a 'zone'.

26 PHOENICS User Meeting 2006 PHOENICS Today The Editor can also output the entire geometry as a FieldView unstructured file. VR Editor Improvements Each object is shown in FieldView as a Boundary.

27 PHOENICS User Meeting 2006 PHOENICS Today This is what the Editor makes of it. VR Editor Improvements

28 PHOENICS User Meeting 2006 PHOENICS Today When PARSOL is active in Polar co- ordinates, the contours and vectors in the cut cells are displayed correctly. VR Viewer Improvements

29 PHOENICS User Meeting 2006 PHOENICS Today VR Viewer Improvements Valve simulation

30 PHOENICS User Meeting 2006 PHOENICS Today VR Viewer Improvements

31 PHOENICS User Meeting 2006 PHOENICS Today When cyclic boundary conditions are active, an extra tab appears on the Viewer Options dialog. VR Viewer Improvements From here it is possible to repeat the image in the X direction as many times as wanted.

32 PHOENICS User Meeting 2006 PHOENICS Today The original geometry VR Viewer Improvements

33 PHOENICS User Meeting 2006 PHOENICS Today Repeated 9 times VR Viewer Improvements

34 PHOENICS User Meeting 2006 PHOENICS Today The contours repeated VR Viewer Improvements

35 PHOENICS User Meeting 2006 PHOENICS Today The colour palette can be reversed VR Viewer Improvements

36 PHOENICS User Meeting 2006 PHOENICS Today Streamlines can also be repeated VR Viewer Improvements

37 PHOENICS User Meeting 2006 PHOENICS Today The sources and sinks for an object can be displayed: VR Viewer Improvements

38 PHOENICS User Meeting 2006 PHOENICS Today For selected objects, the surface contour values can be output to a file which can be read into Excel or Autoplot. VR Viewer Improvements 3D Nav.Sto.Flow Around A Moving Van Pressure surface values for object BODY X Y Z Pressure E E E E E E E E E E E E E E E E E E E E E E E E E E E E+01

39 PHOENICS User Meeting 2006 PHOENICS Today For selected objects, a surface profile on the current plotting plane can be output to a file which can be read into Excel or Autoplot. VR Viewer Improvements X Y Z Pressure E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E+01

40 PHOENICS User Meeting 2006 PHOENICS Today Pressure profile on an aerofoil VR Viewer Improvements

41 PHOENICS User Meeting 2006 PHOENICS Today For buoyancy-driven flows, the effect of buoyancy on turbulence can be significant. In stably-stratified flows, such as smoke layers, turbulence can be damped. Conversely, in the vicinity of plumes, the turbulence can be enhanced. These effects are implemented in the K- ε models via an additional source term. Earth Improvements

42 PHOENICS User Meeting 2006 PHOENICS Today The choice between stable or unstable stratification was previously made by setting a constant to 0.0 or 1.0, and so could never be universally correct. An 'auto' function has been introduced which switches between the stable and unstable forms depending on the local flow direction. This should produce better results for cases with zones of both stable and unstable stratification. Earth Improvements

43 PHOENICS User Meeting 2006 PHOENICS Today Geometry of standard room fire test –62.9MW steady fire Earth Improvements

44 PHOENICS User Meeting 2006 PHOENICS Today Buoyancy constant = 0 -> layered flow Earth Improvements

45 PHOENICS User Meeting 2006 PHOENICS Today Buoyancy constant = 1 -> Plume Earth Improvements

46 PHOENICS User Meeting 2006 PHOENICS Today Calculated buoyancy constant Earth Improvements

47 PHOENICS User Meeting 2006 PHOENICS Today Auto solution is somewhere between plume and layer! Earth Improvements

48 PHOENICS User Meeting 2006 PHOENICS Today The solution can be output in TECPLOT format. An output file, TECDATA.DAT, containing two TECPLOT zones for each PHOENICS domain is written. The first zone contains data at the cell centres (adjusted for PARSOL cut cells), and the second contains data at the cell corners. The first is better for plotting vectors, the second for plotting contours and iso-surfaces. Earth Improvements

49 PHOENICS User Meeting 2006 PHOENICS Today Earth Improvements The geometry and solution from Library case V146 displayed in TECPLOT 10.

50 PHOENICS User Meeting 2006 PHOENICS Today The solution can be output to FieldView in PLOT3D format. Two output files, FVDATA.G and FVDATA.F, containing two grids for each PHOENICS domain are written. The first zone contains data at the cell centres (adjusted for PARSOL cut cells), and the second contains data at the cell corners. The first is better for plotting vectors, the second for plotting contours and iso-surfaces. Earth Improvements

51 PHOENICS User Meeting 2006 PHOENICS Today Earth Improvements The geometry and solution from Library case V146 displayed in FieldView 11.

52 PHOENICS User Meeting 2006 PHOENICS Today In addition to the normal multi-coloured vectors, we can have VR Viewer Improvements Vectors all in one colour Or any thickness Or with the size of long vectors limited

53 PHOENICS User Meeting 2006 PHOENICS Today A quick-zoom function has been added Press the control key then move the mouse sideways to drag a zoom-box. General Improvements

54 PHOENICS User Meeting 2006 PHOENICS Today The axes can be unlocked from the domain origin, and placed anywhere General Improvements

55 PHOENICS User Meeting 2006 PHOENICS Today The hand-set icons appear on the tool bar, so the hand-sets can be turned off General Improvements

56 PHOENICS User Meeting 2006 PHOENICS Today The image can be annotated with text strings General Improvements

57 PHOENICS User Meeting 2006 PHOENICS Today We are now testing a 64-bit Windows version of PHOENICS It does not suffer from the memory limitations of the 32-bit versions Preliminary tests seem to show that performance is very similar, however many bits there are! General Improvements

58 PHOENICS User Meeting 2006 PHOENICS Today The location of the PHOENICS installation is now held in an environment variable. This makes it possible to install PHOENICS into any convenient location, not just the root of a drive. It also makes network installations neater, as only the environment variable and a working directory need be present on client machines. General Improvements

59 PHOENICS User Meeting 2006 PHOENICS Today SPP Improvements The following Special-purpose versions have been brought into the VR environment: CVD, for Chemical Vapour Deposition ESTER, for Electrolytic Smelting of Aluminium Both have dedicated Main menus and object types

60 PHOENICS User Meeting 2006 PHOENICS Today FLAIR Now a few words about the FLAIR Special-Purpose version of PHOENICS. Some people have asked What is FLAIR?

61 PHOENICS User Meeting 2006 PHOENICS Today What is FLAIR? FLAIR is a Special-Purpose version of the general CFD code PHOENICS. It is aimed at the HVAC community. It has been created by removing many unneeded generic features, and adding several specific features.

62 PHOENICS User Meeting 2006 PHOENICS Today FLAIR Features FLAIR uses the PHOENICS VR-Editor to set the problem up, with the following additional items: –ISO 7730 Comfort index calculations: PMV, PPD. –ISO 7730 Draught rating. –CIBSE dry resultant temperature. –Humidity calculations, with output of humidity ratio and relative humidity. –Smoke movement calculation, with output of PPM, smoke density and visibility. –Mean age of air calculation. –Fan operating point calculation for single and multiple fans. –System-curve calculations.

63 PHOENICS User Meeting 2006 PHOENICS Today In addition, the following object types have been added: –Diffuser Round FLAIR Features

64 PHOENICS User Meeting 2006 PHOENICS Today Vortex FLAIR Features In addition, the following object types have been added: –Diffuser

65 PHOENICS User Meeting 2006 PHOENICS Today Rectangular FLAIR Features In addition, the following object types have been added: –Diffuser

66 PHOENICS User Meeting 2006 PHOENICS Today Directional FLAIR Features In addition, the following object types have been added: –Diffuser

67 PHOENICS User Meeting 2006 PHOENICS Today Grille FLAIR Features In addition, the following object types have been added: –Diffuser

68 PHOENICS User Meeting 2006 PHOENICS Today Displacement FLAIR Features In addition, the following object types have been added: –Diffuser

69 PHOENICS User Meeting 2006 PHOENICS Today FLAIR Features In addition, the following object types have been added: –Diffuser –Fire

70 PHOENICS User Meeting 2006 PHOENICS Today FLAIR Features In addition, the following object types have been added: –Diffuser –Fire

71 PHOENICS User Meeting 2006 PHOENICS Today FLAIR Features In addition, the following object types have been added: –Diffuser –Fire –Person (standing or sitting facing any Direction)

72 PHOENICS User Meeting 2006 PHOENICS Today FLAIR Features In addition, the following object types have been added: –Diffuser –Fire –Person –Crowd To represent a large number of people as distributed source of heat

73 PHOENICS User Meeting 2006 PHOENICS Today FLAIR Features In addition, the following object types have been added: –Diffuser –Fire –Person –Crowd –Sunlight Created in Shapemaker

74 PHOENICS User Meeting 2006 PHOENICS Today FLAIR Features In addition, the following object types have been added: –Diffuser –Fire –Person –Crowd –Sunlight –Spray head

75 PHOENICS User Meeting 2006 PHOENICS Today Spray-head represents sprinklers user for fire- suppression. It uses GENTRA to model the droplet paths. Evaporation is considered, and is linked to the FLAIR humidity model. The GENTRA inlet table is written automatically. FLAIR Features

76 PHOENICS User Meeting 2006 PHOENICS Today Spray-head represents sprinklers user for fire- suppression. It uses GENTRA to model the droplet paths. Evaporation is considered, and is linked to the FLAIR humidity model. The GENTRA inlet table is written automatically. FLAIR Features

77 PHOENICS User Meeting 2006 PHOENICS Today Geometry Creation We are often asked to create geometry from unusual sources. Recently we received a PDF file which contained this image-

78 PHOENICS User Meeting 2006 PHOENICS Today Geometry Creation The numbers represent the height of the building

79 PHOENICS User Meeting 2006 PHOENICS Today Geometry Creation The solution was to save the image as a GIF file, then use it as a backdrop in AC3D We could trace round each part, then extrude

80 PHOENICS User Meeting 2006 PHOENICS Today The resulting geometry was then exported to PHOENICS Geometry Creation

81 PHOENICS User Meeting 2006 PHOENICS Today


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