What's new in the current Version of Software AnTherm
Thermal bridge heat and vapour transfer simulation program AnTherm in its version 9 provides vast amount of functions and abilities which perfectly support the user in his daily work. Moved to the newest technology further improvements have been applied to the new version adding additional efficiencies when working with the software.
Continuous further development of the software up to its current version has been strongly influenced by users' feedback. Thanks to all subscribers for showing their trust to the project.
Since the project start in 2003, which followed the early works of 1980's and 90's, and the initial release of version 1 (deployed on 6th June 2005) further continuous improvements to the program have been achieved. In September 2007 the version 3 has followed the version 2 which has been made available in January 2007. After the version 4 has been deployed in November 2008 and the version 5 in March 2010. Technologically updated version 6 was made available in September 2010 which was followed by then Anniversary version 6.100 in June 2011. The version 6.106 continues implementation of major user wishes on the one hand, and additionally introduces the 4-D, time dependant, transient simulations for the year 2012. The version 6.114/5 optimizes the functionalities. The version 7.125 integrates the optimum of functionalities on top of the newest platforms.
AnTherm permits the combination of several model files to projects. Upon the user's wish a list of projects is displayed, the user is able to choose a project and then a model file associated with this project. In this way it is easier than previously to retrieve a particular model.
Inhomogenous Layer Calculator:
For inhomogenous layers (such as bricks) homogenous replacement constructions can be computed and the equivalent values can be retrieved.
Three-Space Psi Calculator:
The Psi value can now be calculated for a three-space case with an unheated buffer space.
Cause DXF Import produces only material elements, we derive from the "Material name" the name for the boundary condition too (space, surface and power source name) - this is helpful for changing element type later appropriately.
ProbePointsForm renamed to "Probe Points / Extremal (Min/Max) Locations" (in main menu "&Probe points / Min/Max") ProbePointsForm received the context menu (New/Delete/GoTo/Pick from Project) and Tooltips on the point list, GoTo, Report. ProbePointsForm return to the recently used tab (Settings.LastSelectedProbePointsFormTabPageName, the default is the "Min/Max-Tab"; After "Collect Point" switches automatically the the "User-Tab").
ApplicationSettingsForm has Tabs, LastSelectedApplicationSettingsFormTabPageName. ESC-key closes SettingsForm, ApplicationSettingsForm
Solver, die Calculation Engine:
DeltaTraceItNo added IterationControlParameters, currently not editable.
The option TRANSIENT was introduced - it provides methods for thermal analysis of dynamic behavior of building constructions when boundary conditions are changing in time periodically and the effects of heat capacity (heat storage) must be considered - in addition to the HARMONIC option/a>.
Custom: max of 1000 harmonics. (internally the solver can go up to 2000 harmonics).
For the purpose of dynamic, transient problem (subject to the TRANSIENT option) the boundary conditions window mutates to allow input of time dependant quantities – preset with ConstantValue out of steady state problem.
The PPeriodic / Harmonic Data Editor supports creation, editing and management of timelines for various periodic data types: RegularPoints, RegularMeans, IrregularMeans, IrregularSteps, ConstantValue, HarmonicCoefficients. Graphical and Tabular input methods are provided.
Project file now stores Periodic Boundary Conditions (Spaces and Power Sources). For each Period (including MainPeriod=0 - steady state) a set of boundary conditions is retained as template (and available to be saved after boundary conditions are applied). All BCs will be merged by their Names into the projects BC-Template upon apply. This will retain BCs even when spaces or power source are renamed or removed from the project. Compatibility with the earlier versions is provided (TemplateBoundaryConditionValues will be read and moved to BoundaryConditionTemplates for the respective period).
For the evaluation the harmonic base solutions are combined with the respective harmonic coefficients of the boundary condition the belong to (complex linear combination). The resulting distribution harmonic coefficients it then passed for Fourier synthesis for specific evaluation time point T.
The runtime environment of AnTherm has been fully migrated to the newest MS Framework .NET3.5/4. This very extensive upgrade leads to much better runtime behavior of the application and provides next milestone towards further development.
The new setting "MulticoreOptionActive" allows to temporarily turn off this option. Extended application settings "InstationaryOptionActive", "Stereo3DViewOptionActive", "MulticoreOptionActive" are now ReadOnly (instead of being hidden) when the targeted license option is not available.
and much more...
Anniversary version 6.100 (June 2011) compared to V.6:
Input and Model Entry:
Revolution: i.e. a 3D model can be constructed out of a 2D one by revolving the 2D object by 90° around vertical or horizontal rotation axis.
If solver calculation bails out due to parametric constrains an additional diagnostic message showing the solution status (state of basis solution, solved/aborted, availability of the coupling coefficients matrix) is displayed (e.g. when solver aborts after reaching the maximum number of iterations set). The dialog shown also offers direct jump to solver documentation.
The coordinate data precision of the fine-grid has been doubled. Past projects resulting in more precise fine grid will be recalculated automatically when needed.
The „Probe Points window“ lists locations for all extremes of all boundary conditions (spaces and power sources). The listing is updated upon update to boundary conditions. It can be used to easily „jump“ onto such extreme locations within Results3D window.
The „probe points report“ now shows warmest surface points (max), in addition to coldest points (min), for each space too. It displays extreme values (min and max) for all power sources also.
Panning the display with the keyboard is now available for interaction (Shift+Cursor keys and Shift+Numeric Block keys). Pan-Buttons have been added to the panel „3D“.
Streamlines are created at much higher precision. The integration step of earlier projects will be automatically adjusted (new default value 0.1mm, values below 0.051mm will be raised by 10, values smaller then 0.005mm set to 0.05mm)
Streamlines rendering longer then 100.000 segments and tubes collectively rendering in more than 1.6 million vertices (depending on the number of tube sides set within application settings) will be rendered as lines only. This shall avoid running out of memory when very complex streamlines were rendered as tubes.
Flying to an isometry (shift-double-click within Isometries window) acts on Results-3D window only (animation is off within Elements3D now).
New application setting “Help Window shown TopMost”: Help window will be shown topmost to application windows and automatically minimize with the application (this is the windows default behavior). When turned off (the default) the help window can be set behind the application window via typical desktop window manager.
Axes displayed on Elements3D are now shown at „Outer Edges“ (earlier „Closest Triad“).
On systems which virtualize OS folders (eg. Vista) the activation shall always proceed via the „Alternative License File AnTherm.HID“. The license file shall be placed into folder not controlled by the virtualization (e.g. user folder).
Saving 3D images is now possible even on very weak graphic systems with WindowsXP (e.g. Netbook with Intel Graphics).
Elements copied via the clipboard retain their overlapping order (the order is not derived from the selection order anymore).
On systems older then Windows Vista (ie. Windows XP) the default setting "EnableVisualStyles = FALSE". This is required to compensate for implementation errors of the operating system (text of vertical tabs in Results3D window do not show).
New Application setting OpenGLSetting: ExplicitBackfaceProperty: will assign BackfaceProperty=FrontFace for modelSliceX, modelSliceY, modelSliceZ, model, sliceZ, sliceY, sliceX, isosurface, surface; Used to resolve rendering issues on (very few) systems rendering only one side of surfaces. (Workaround added to Documentation FAQ too)
Resolved compatibility issue raised on older Windows XP machines during image export of 3D renderings
and many more...
Technology, tooling and efficiency - the new version 6 (September 2010):
New technology and platform, new techniques, new perspective:
Full technology migration to the new, proven MS .NET Windows platform: still simpler install, faster execution, shorter calculation times, automated runtime optimization of the program adjusting to technical equipment of the computer. The startup and shutdown of the application are fulgurous too.
Using the latest visualization platform in its newest version: still more exact, partly acquired patented algorithms, fully in double precision, new demand driven and efficient visualization pipelines.
Even cases numerically poorly conditioned can be calculated precisely and quickly without any user intervention (very detailed structures, slopes and curvatures modeled with detailed stepping, thin foils, holders, spikes etc.) - relaxation factor can now freely go up to the maximum of 2.0 without the risk of instability and eventual abort without reaching the solution (earlier 1.998).
Improved automation of the Psi-Value (Ψ) determination:
The Ψ-Value determination has been reworked and redesigned to allow automated Psi-Value determination in further 2D cases by far.
Additionally the tool will automatically choose most logical U-Value profiles identified automatically - connections like "interior-interior" will be offered when other options are absent.
Layered constructs of the Psi-Value calculation can be edited, changed, saved or even independently loaded within the U-Value calculator.
If required one can manually override numbers used for calculation which where initially automatically determined.
In such cases for which no automated calculation support can be offered by the tool the message will be displayed - the manual calculation is still possible based on values provided in Coupling Coefficients and Modeling reports.
Comfort and convenient simplification of data input:
The switch to turn off the display of Tip-Of-The-Day is kept inactive until all tips has been seen 2 times and the each had 10 seconds to display in average or the user went 10 times through all the tips (clicked through).
New license feature VERSION201009 required for execution of the version 6.89 and higher.
Thermal surface resistance values for window, frame and door calculations as required by EN ISO 10077 (also reduced Rsi values for corners) included in standard surfaces (appropriate to calculate thermal resistance of respective components).
Fully automatic calculation of the transient, harmonic thermal coupling coefficients (with HARMONIC-Option). The Coupling Coefficients Report displays matrices of harmonic thermal coupling (one matrix for each chosen period given as complex number and as matrix of value and argument ). That output allows easy readout of Lpe (coupling coefficient exterior to interior) or time lag (phase lag, shift) values. Diagonal elements are significant (contrary to steady state case) and can be used for calculating effective heat capacities. Same as with steady state case there is no need to know nor to apply any boundary conditions to obtain these results!
New and faster, more efficient 3D evaluations and visualizations:
HedgeHog (Vector Arrows) visualization of heat- or vapor stream vector field added. The vector field can be shown with arrows, cones or lines of fixed length or scaled by vector norm, at points on uniform, regular mesh. .
The display of the Probe-Cross can now be controlled independently from Slice Planes .
Import of Image underlay/overlay: For 3D projects there are up to three image underlay slots available - to the planes XY, YZ und ZX. The image will be displayed within the Elements2D window (either as underlay or transparent overlay).
DXF-Importer shall now read all common text file line endings: Windows (CR LF) - Macintosh (CR) - Unix (LF)
Within the DXF-Import Dialog one can set the number of decimal places at which coordinate values imported shall be rounded. DXF coordinates are now read in in double precision.
Culmination of improvements in the version 4 (November 2008):
The License Model has been extended with update-subscription program (software maintainance) providing instant access to newest developments during the subscription period to all subscribers. Furthermore, time limited one year licenses allow better budgeting of license fees simultaneously connected to the newest available version at each entrance to the next year subscription.
Fully automatic calculation of the linear thermal transmittance correction term Psi for two dimensional two-space cases (Psi-Value Determination).
Characteristic indicators (coupling coefficients, points of critical temperatures, fRsi etc.) can be evaluated even for equations of many millions of cells (i.e. tens of millions of nodes) - thanks to better memory management implementation (remark: graphical evaluations can be switched off).
In calculations of models with power sources it is sufficient to supply one space (temperature) for successful simulation.
The calculation is reinitiated after any changes to solver parameters (e.g. precision settings)
The grid (equation) generator at material boundaries processes material changes (e.g. lambda ratio) at higher precision. The calculation will restart automatically if required.
The precision of the solver has been improved by the significant order of magnitude. Close-Up errors of less then 10-10 can be reached without any additional computational time. Same applies to temperature deviation (termination condition). Solution result of earlier calculations will be transformed to higher precision automatically.
Essential improvements in the September 2007 version 3:
DXF (Acad) Import has been reengineered to gain significant performance gain (factor of 10.000 !). This allows efficient and easy integration of very detailed CAD models into AnTherm. Such very complex models come into existence if, within CAD program, orthogonalization of modeled slopes and curvatures has been performed (this is required for AnTherm import).
Repaints of element list for very large and complex projects has been sped up significantly (now about 10 times faster). This allows efficient processing of models of even many thousand elements without disturbing latencies.
Speed of bulk operations (e.g. material assignment to many selected elements) has also been improved significantly. This allows efficient processing of models of even many thousand elements without disturbing latencies.
Context menus of element editing show names of spaces/rooms, power sources, groups, materials and surfaces in alphabetically sorted lists (according to the current language setting). This provides much easier element selection on these criteria.
Streamlines in equidistant intervals of heat stream (or vapor stream) from the space edge in 2D case. This evaluation is possible for 2D projects or other project types in which the modeled construction is fully homogenous in the Z-direction an no space connections exist in this direction.
Speedup and stabilization of Streamline evaluations. The „kernel“ of streamline evaluation has been reengineered significantly resulting in much better quality of results an high stability. Much energy has been brought into finding a compromise between speed, memory requirements and quality. The integration step factor now relates to minimum step size of the Runge-Kutta method. Actual step size is controlled and adapted automatically – from one fine grid cell to the next. This provides very detailed and precise presentation of streamlines for heat stream fields and vapor diffusion streams too!
Execution performance of element list has been significantly improved for showing very large lists and supporting massive bulk selections. This allows modeling and processing of constructions built of many thousands of elements.
An Airspace calculator can be started from "Tools" menu - calculates equivalent heat transfer coefficient for small cavities. Many functions of this airspace calculator have been deeply integrated into the program (automatic takeover of extents, transfer of resulting value onto selected elements, etc.)