Thermal Bridge Heat Transfer & Vapour Diffusion Simulation Program AnTherm Version 6.115 - 8.133 

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Further hints and instructions

Elements 2D  
Move the mouse pointer over the picture shown in within the Elements 2D window.

Press and hold the left mouse button, then move the pointer.

You can adjust the view according to your needs.

The view can be „scrolled“ arbitrarily.

You can use scrollbars to pan the visible view area also.

Press the button Fit The position and scaling of the view will be adjusted in such a way, that the whole construction is made visible within the window.
Turn the mouse wheel The view is scaled (Zoom-In/Zoom-Out).

Scaling is cantered around the current mouse pointer position. This allow zooming directly into the region of interest.

Elements 3DResults 3D  
Place the mouse pointer over the view within the Elements 3D window.

Press and hold the left mouse button, then move the pointer.

You can adjust the 3D view according to your needs.

Moving the mouse with left button depressed results in a rotation like by turning a „Track-Ball".

The view behaves as if it were attached to a "ball" whose centre is at the centre of the view window. The mouse cursor is attached to the part of the ball that protrudes above the surface of the window.

Hold the Ctrl-key of the keyboard depressed, then press the and hold left mouse button, then move the pointer. The 3D view is rotated around the axis in the geometrical centre of the view and perpendicular to the screen surface (rotation around the block axis, also called "Rolling").

You will need this function to flip the view "upside down" for example.

Hold the Shift-key of the keyboard depressed, then press the and hold left mouse button, then move the pointer. The view is translated in the plane of the window following the mouse pointer,
Press and hold the right mouse button, then move the pointer. The view is scaled (zoom-in and zoom-out).

Scaling operation is executed relative to the geometrical centre of the 3d view in virtual space

Press the button Fit The position and scaling of the view will be adjusted in such a way, that the whole building component fits into the view.
Fine Grid parameters  
After Results… (in the main menu) has been requested the window of Fine-Grid-parameters is shown. You have the choice of two procedures:
  1. You define all the parameters, including the maximum step of the grid (MaxStep)
  2. You set the number of cells to be included in the equations (Target model size) and let the software estimate the MaxStep accordingly.

In the letter case (the model size has been input) the application will iteratively adjust the MaxStep until the requested number of cell matches  the current value +/- 10%.


Streamline parameters  
To receive nice  streamline visualization it might be required to adjust few settings The integration step length is given in millimetres. The number entered is used only at initial stage of the Runge-Kutta method implemented. Particular step lengths are adjusted adaptively - from one cell to the other. This provides the ability of very detailed visualization of streamlines!

The maximum propagation length is given in millimetres also. During tracing a streamline the trace length is cumulated (the sum of all segment lengths of a streamline traced) and if the limit set here is reached, tracing of that streamline aborts.

The next parameter which limits the length of a streamline is given by the maximum number of steps. The limit of 100000 segments is hard coded within the application. Higher number would overwhelm the capacity of today's hardware equipment when combined with tube visualization.

The tube radius is given in millimetres. The initial value of the tube radius is computed based on median extent of current component (1/200 of it).
Setting the tube radius = 0 will show it as simple line.

Start at – Probe X/Y/Z: Only one streamline passing the point of intersection of the three slice planes X/Y/Z will be created. To get the streamline drawn all three slice planes must intersect within the model's body.

Start at – Space Boundary: Produces a set of streamlines started at selected space boundary. The application calculates the sum of stream flowing to the space and the sum of stream leaving the space through the boundary (for exterior space, case with two spaces without powers sources one of this values is always 0). The sum with the largest modulus is divided into the number of intervals entered. Along the space boundary the application repeats the calculation of the stream function and places start points for the streamline at interval boundary values calculated earlier (interpolated).

Streamlines at equidistant intervals of heat stream from space boundary in 2D case
  1. Create or load a 2D project;
    Apply boundary conditions -> Graphical evaluation (Results 3D window)
  2. All streamlines will start (and in 2D case will fall into) the Z slice plane, therefore the slice Z must be active (even if transparent and thus invisible).
    Recommended combination of settings (allows quick initial visualization):
    • General: Perspective OFF (it is 2D only), Outline OFF
    • Model: Model active OFF, Model Slices active OFF (later you eventually can vary the visibility of model slices at Z plane, tube radius of a streamline and colouring)
    • Surface: Surface active OFF (otherwise it would obscure the interior, including streamlines!), Edges OFF, Slice Edges ON (or OFF), Colorize Slice Edges ON/BLACK/WHITE (upon to your favour)
    • Slice X active OFF (required only for intersection of  slice X/Y/Z, now disturbing only by the intersection cross shown in the view)
    • Slice Y active OFF (see above.)
    • Slice Z active ON, Value 500; Opaque ON, Solid ON, Colorizing ON (later you can vary Opaque/Solid/Colorize, the value does not need to be 500 - it is arbitrary within z-homogenous/2D models)
    • Isolines OFF (the combination with streamline might be very interesting later, for know let it OFF)
    • Labels n/a (actually no preference)
    • Isosurface OFF
    • Streamlines active ON, eventually Tube-Radius=0 (memory demand), Start-At SPACE-BOUNDARY, Opaque ON, Solid ON, Colorize WHITE
    • Colorbar OFF (actually no preference)
    • Probe OFF
    • Axes OFF (actually no preference)
    • 3D: View from TOP (The middle box-button at the right column) Perspective OFF (button not shown depressed)
  3. Now, within the Streamlines tab select the components edge by selecting the space by its name and set the number of intervals At initial view we advise you to turn the tube function of the streamline off (radius = 0) - the 3D representation of a tube has potentially very high complexity (millions of polygons!) and might result in very high demand on graphics memory.
  4. Collect Parameters (also 3D), eventually transfer it to "standard", adjust detail (right mouse button over the list of evaluation settings).
  5. Save the project (together with evaluation settings collected), standard setting will be saved automatically at application exit.



continue with modelling by dynamic overlapping of elements ...

 Model, Calculate, Simulate and Analyse Thermal Heat Bridges in 2D and 3D with AnTherm®  

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 Copyright © Kornicki Dienstleistungen in EDV & IT

2014-03-04 10:19 +0100