
Bitmap input
 Same as in BISCO
(also drawing and fill tools for bitmap editing)
 Additional input of material densities and specific heat values
 Thermal conductivities and specific heat values may be temperature dependent (e.g. useful in fire simulations)

Dynamic boundary conditions
 Boundary conditions are time dependent functions: constant, steps,
periodic, reference climate, fire curve,
user defined
 Preview (with zoom) of time functions and
temperature functions (material properties)
 Improved simulation of (nonlinear) radiation and convection by use of
RADCON module

Solution
 Dynamic calculation parameters: time step interval; startup
calculation duration to get dynamic start values; calculation duration
 Automatic triangulation and view factor calculation
 Multiple calculation cycles of linear systems for
solving nonlinear properties
 Temperature calculation at time step intervals using CranckNicolson
finite difference method
 Recalculation of temperature dependent properties
at each time step

Output
 Graphic animations (AVI files) of time varying temperatures
 Snapshots at any time step
 Tables and graphs of time varying temperatures and heat flows

Applications
 Transient analysis of thermal bridges /
construction elements
 Dynamic thermal analysis of heating / cooling
 Fire engineering (according
to Eurocodes)
 Ground heat losses (EN ISO 13370) and
frost insulation (EN ISO 13793)
 Glass fracture caused by solar radiation
 Phase change materials (PCM)

Compatibility
 BISTRA can read BISCO data
 VOLTRA can read BISTRA data
 Same function definitions as in CAPSOL
