NISA/Heat is a general purpose finite element program to analyze a wide spectrum of problems encountered in heat transfer.
ANALYSIS FEATURES
- Linear and nonlinear
- Nonlinearity due to material properties and/or boundary conditions, such as temperature-dependent thermal conductivity and phase change (melting and freezing)
- Steady state and transient
- Time integration techniques (forward difference, trapezoidal, backward difference)
- Constant or variable time step conditions
- Loading and boundary conditions may be time- and/or temperature-dependent
- Radiation effects with view factor calculation
- Restarts
- Automatic submodeling in user-defined regions for more accurate stress calculations
MATERIAL PROPERTIES
- Isotropic and orthotropic
- Time- and/or temperature-dependent
LOADING
- Concentrated heat flows
- Distributed heat flux
- Internal heat generation, node or element
BOUNDARY CONDITIONS
- Specified nodal temperature
- Coupled temperatures
- Convection and Radiation
NONLINEAR CAPABILITIES
- Temperature-dependent material properties
- Time- and temperature-dependent boundary conditions
- Convection
- Radiation
- Phase changes (melting and freezing)
- Surface radiation with view factor calculation
OUTPUT
- Nodal temperature time history
- Temperature gradients in shells
- Temperature distribution at specified time step
- Nodal heat values
