PHOENICS Today PHOENICS 2008 February Computer Simulation of Fluid Flow, Heat Flow, Chemical Reactions and Stress in Solids.

PHOENICS Today Contents This presentation shows some of the new features in PHOENICS 2008 The talk is in five parts: –Pre-processor (VR-Editor) –Post-processor (VR-Viewer) –Solver (Earth) –General improvements (common to all modules) –Highlights of earlier improvements

PHOENICS Today Possibility to show thumbnails of geometry files VR Editor Improvements

PHOENICS Today Possibility to show thumbnails of geometry files VR Editor Improvements

PHOENICS Today Save as a case and Open existing case save and restore intermediate step/sweep files. As these files can be very big, this step is optional. A dialog will display the required disk space or warn that there is not enough room for the operation. VR Editor Improvements

PHOENICS Today In Flair/HOTBOX the file holding the fan characteristics curves can be edited directly from within the interface (Main Menu – Models). In Flair/HOTBOX the list of fans present in the fan data file is presented as a selectable list for each FAN object. VR Editor Improvements

PHOENICS Today In Flair the Fire and Smoke dialogs have been updated to use terminology from the standards documents. VR Editor Improvements

PHOENICS Today In Flair there are now two sight-length variables, –for weakly-reflective and –light-emitting objects. The default constants are set for these conditions, and the help file/User manual give more details of how they are obtained. VR Editor Improvements

PHOENICS Today In transient cases, the POINT_HISTORY object can select which variable(s) to create time history information for. All SOLVEd and STOREd variables can be handled. VR Editor Improvements

PHOENICS Today Earth Improvements When PARSOL and GENTRA are active together, the particles will bounce from the true facetted surface of the object. Previous version

PHOENICS Today Earth Improvements When PARSOL and GENTRA are active together, the particles will bounce from the true facetted surface of the object. Current version

PHOENICS Today Parallel PHOENICS has been amended to enable it to work satisfactorily with moving objects using MOFOR. Earth Improvements

PHOENICS Today The calculation of forces and moments on blockages has been extended to non-facetted objects which use cube***.dat as a geometry file. The calculation of forces and moments is correct for cylindrical-polar coordinates. Earth Improvements

PHOENICS Today The time-history plots in RESULT can now extend to steps. Previously there was a limit of 9999 steps. The built-in interfaces to TECPLOT and FIELDVIEW have been extended to BFC multi-block. Earth Improvements

PHOENICS Today Thin curved objects can be implemented by using solids with material 299. Surfaces which align with the grid, and un-cut cells are ignored. Cut cells have their areas and volumes set to zero, thus preventing flow. Earth Improvements

PHOENICS Today Earth Improvements

PHOENICS Today The tabs of the Options dialog have been updated to provide more control over the displayed image. VR Viewer Improvements

PHOENICS Today The vector component normal to the plotting plane can be toggled on or off to assist in visualising secondary flows. VR Viewer Improvements

PHOENICS Today VR Viewer Improvements Total Vectors

PHOENICS Today VR Viewer Improvements In-plane Vectors

PHOENICS Today The user can select any 1, 2 or 3 variables to use as vector components. This can be used to plot, say, heat flux vectors VR Viewer Improvements

PHOENICS Today VR Viewer Improvements

PHOENICS Today VR Viewer Improvements

PHOENICS Today VR Viewer Improvements

PHOENICS Today VR Viewer Improvements

PHOENICS Today The tabs of the Options dialog have been updated to provide more control over the displayed image. VR Viewer Improvements

PHOENICS Today The tabs of the Options dialog have been updated to provide more control over the displayed image. VR Viewer Improvements

PHOENICS Today A line graph of any variable can be drawn between two specified points. VR Viewer Improvements

PHOENICS Today A line graph of any variable can be drawn between two specified points. VR Viewer Improvements

PHOENICS Today The data for the plot is also output to a text file which can be easily imported to Excel. The output format for dumped profile, and surface data has been changed to make it more readily compatible with Excel. Similarly for time histories dumped from the POINT_HISTORY object. VR Viewer Improvements

PHOENICS Today 'Show Results' for an object scans through RESULT for the data relating to the time-step (or sweep) currently being plotted. VR Viewer Improvements

PHOENICS Today Use of textures to improve visual appearance of objects General Improvements

PHOENICS Today Improved control of lighting for the scene General Improvements

PHOENICS Today Improved control of lighting for the scene –None General Improvements

PHOENICS Today Improved control of lighting for the scene –Diffuse only General Improvements

PHOENICS Today Improved control of lighting for the scene –Specular General Improvements

PHOENICS Today Improved control of lighting for the scene –+Y General Improvements

PHOENICS Today Improved control of lighting for the scene –+X General Improvements

PHOENICS Today Improved control of lighting for the scene –-Y General Improvements

PHOENICS Today Improved control of lighting for the scene –-X General Improvements

PHOENICS Today General Improvements There are now separate increments in each coordinate direction for moving the probe or sizing objects.

PHOENICS Today  64-bit Windows version of PHOENICS is available  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

PHOENICS Today New option for rotating co-ordinates. Previously, the entire domain had to rotate. Stationary walls were given a negative velocity. Could not be used with rotor-stator arrangement, as could not represent stationary part. New Feature

PHOENICS Today New object type ROTOR introduces zone of rotating co-ordinate within static domain. All cells within the rotor object are shifted in X relative to the static domain at the start of each time step. Only one object-detection sequence is needed, as everything within the rotor goes round with it. New Feature

PHOENICS Today New object type ROTOR introduces zone of rotating co-ordinate within static domain. New Feature

PHOENICS Today Time step size and number of steps are automatically set from the input parameters. In this release only one ROTOR object is allowed, but this restriction will be removed if the option proves popular. New Feature

PHOENICS Today New Feature First example shows a row of simplified blades pulled between two simplified stators.

PHOENICS Today New Feature Second example shows flow induced by a rotating propeller

PHOENICS Today Previous highlights Here follow some improvements made in previous release(s) which are worth mentioning again, in case they have been missed.

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

PHOENICS Today The default grid can then be easily refined VR Editor Improvements

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

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

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

PHOENICS Today This allows us to use more suitable grids… VR Editor Improvements

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

PHOENICS Today VR Editor Improvements

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.

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.

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

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

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

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

PHOENICS Today VR Editor Improvements

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

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

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

PHOENICS Today Geometry of standard room fire test –62.9MW steady fire Earth Improvements

PHOENICS Today Buoyancy constant = 0 -> layered flow Earth Improvements

PHOENICS Today Buoyancy constant = 1 -> Plume Earth Improvements

PHOENICS Today Calculated buoyancy constant Earth Improvements

PHOENICS Today Auto solution is somewhere between plume and layer! Earth Improvements

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

PHOENICS Today Geometry Creation The numbers represent the height of the building

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

PHOENICS Today The resulting geometry was then exported to PHOENICS Geometry Creation

PHOENICS Today