VOLTRA

3D transient heat transfer
rectangular blocks


Home Products VOLTRA animation examples

Fire simulation - Passive solar heating

VOLTRA version 7.0w with 3D solar processor (see Upgrade info)






Modeling with blocks
  • 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
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
Solution
  • Dynamic calculation parameters: time step interval; start-up calculation duration to get dynamic start values; calculation duration
  • Temperature calculation at time step intervals using Cranck-Nicolson finite difference method
  • Iterative solution of ventilation powers
  • Absorbed solar radiation is converted to additional node powers
  • Solution of internal diffuse solar reflections and solar transmissions using radiosity method
Output
  • 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
Applications
  • Transient analysis of thermal bridges
  • Dynamic thermal analysis of floor heating
  • Analysis of building elements exposed to fire (Eurocodes)
  • Ground heat losses (EN ISO 13370)
  • Heat exchange problems (mass flows)
  • Advanced fašade engineering
  • Passive solar building design (sunrooms, Trombe walls)
Compatibility
  • SECTRA is 2D variant of VOLTRA
  • VOLTRA can read TRISCO data
  • Same function definitions as in CAPSOL
Demo program
  • Download Physibel demo programs and manuals (14 Mb)
Upgrade info