BISTRA

2D transient heat transfer
free form

Fire engineering - glass fracture - ground heat loss - PCM

• Bitmap input

• Dynamic boundary conditions
• Solution
• Output
• Applications
• Compatibility
• Upgrade info

Download PowerPoint Show (1.6 Mb)

• 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)

• 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 (non-linear) radiation and convection by use of RADCON module

• Dynamic calculation parameters: time step interval; start-up calculation duration to get dynamic start values; calculation duration
• Automatic triangulation and view factor calculation
• Multiple calculation cycles of linear systems for solving non-linear properties
• Temperature calculation at time step intervals using Cranck-Nicolson finite difference method
• Recalculation of temperature dependent properties at each time step

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

• 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)

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