Detailed simulation of transient thermal effects 3D building elements

Compare software current version Download demo pricing
VOLTRA Features


  • Transient thermal simulation of 3D rectangular shapes
  • Geometrical input is same as in TRISCO
  • Temperature dependent material properties
  • Detailed solar processor
  • Graphic animations (AVI files) of time varying temperatures
  • Software operational in English, French, German and Dutch
VOLTRA Applications


  • Transient analysis of thermal bridges
  • Dynamic thermal analysis of floor heating
  • Analysis of building elements exposed to fire (Eurocodes)
  • Floor heating (EN ISO 11855-2)
  • Ground heat losses (EN ISO 13370)
  • Heat exchange problems (mass flows)
  • Advanced façade engineering
  • Passive solar building design
  • Calculation of solar heat gains


VOLTRA Input and geometric modelling

Input and geometric modelling

  • Same as in TRISCO
  • Additional input of material densities, specific heat values, solar reflection factors, solar transmission factors
  • Thermal conductivities and specific heat values may be temperature dependent (e.g. useful in fire simulations)
  • Solar reflection factor may be function of angle of incidence



RADCON feature for VOLTRA

  • Detailed simulation of radiation based on view factors
  • Extreme fast and stable calculation of non-linear radiation problems
  • Convection based on (calculated) convective heat transfer coefficient
  • Transparent materials for small cavities: conduction + radiation
  • Validated according to EN ISO 10077-2:2017 (radiosity method)


VOLTRA Dynamic boundary conditions

Dynamic boundary conditions

  • Boundary conditions are time dependent functions: constant, steps, periodic, climate values, fire curve, ...
  • Solar zone with 3D solar processor (any geographical location, based on climate files with global and diffuse solar radiation)
  • Ventilation flow functions
  • Improved simulation of radiation and convection by use of RADCON module




  • Graphic animations (AVI files) of 3D views or 2D cross sections of time varying shadows, absorbed solar radiation, temperatures, heat fluxes
  • Snapshots at any time step
  • Tables and graphs of time varying solar fluxes, temperatures in given nodes, heat flows through given faces


VOLTRA Compatibility with other Physibel tools

Compatibility with other Physibel tools

  • VOLTRA can read TRISCO data
  • Same function definitions as in CAPSOL


VOLTRA Licence options

Licence options

  • VOLTRA is available with perpetual licences or with subscription licences.
  • Subscription licences are protected with a software licence locked to a computer (stand-alone, network or cloud-based floating). With a subscription licence you get access to the latest version of VOLTRA, technical support and Physibel Knowledge Base.
  • Perpetual licences are protected with a stand-alone licence locked to a hardware key. With a perpetual licence you get 1-year AMP (Annual Maintenance Plan). Renewal of AMP is not mandatory but continues your access to major version updates of VOLTRA, technical support and Physibel Knowledge Base.  

what's new in version 8?

  • Functions compatible with TRISCO v14.0w
  • The infrared emissivity of a material surface and the solar transmission factor of a material can be a function of time
  • Software licence options (stand-alone/network floating/cloud-based floating)
Version history


Receive our brochure and pricelist by e-mail and/or download the demo.

  • +
  • +