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Software for heat transfer and ground heat

HEAT2 - Heat transfer in two dimensions


What’s new in HEAT2 version 7
For detailed description please see
Update manual (PDF), 800 kB, 21 pages, revised August 8, 2006


The following list shows a summary of new features:

Automatic mesh generation

HEAT2 can automatically perform steady-state calculations with gradually refined meshes. The user does not have to think about how to give a proper mesh - HEAT2 does this. The mesh criterion from EN ISO 10211 can be applied.


Thermal coupling coefficient analyses

HEAT2 automatically calculates the thermal coupling coefficient matrix (L2D) according to EN ISO 10211 for a wide variety of problems involving thermal bridges.


Faster calculations

Most steady-state problems will now be solved 5-15 times (!) quicker due to optimization of the relaxation coefficient and the numerical scheme.


Batch jobs

Multiple consecutive simulations may be started externally via batch files.


Increased sizes for data fields

Many data fields have been increased in sizes. The maximum number of numerical nodes has been quadrupled from 122500 (350·350) to 490000 (700·700).

The maximum number of cavities with full radiation analyses has been extended from 20 to 50. The maximum number of radiation nodes in each cavity has been extended from 500 to 1000.

HEAT2 7.0 with 490000 nodes requires only about 30 MB RAM (a pc with 256 MB is recommended), and less than 5 MB hard disk space.


Other changes

Hundreds of minor improvements are made. The most important are shown below:

· The emissivity in frame cavities may now be changed

· The temperature field T(i,j) can now be saved/read to/from a file

· Enhancements in pre-processor

· Desktop (placement and sizes of windows) may be saved/read (menu item Options)

· Toggling from HEAT2 6.0 to another program and back again would sometimes close down several windows in HEAT2. This is now fixed.

· The chart window for the recorder can now show multiple graph lines in the same chart

· The summarized boundary flows for boundaries that have the same boundary condition type are now shown (F11)

· For users using old-style text input: the given mesh (length, number of cells, expansion coefficient in each mesh segment) is not overwritten if description of boundaries changes


Enhancements in post-processing:

· Window content may be zoomed to a much higher limit than before

· Faster drawing/updating

· The numerical cell that determines the smallest time-step can be visually shown