NISA/HEAT

Nisa-Heat is a general purpose finite element program to analyze a wide spectrum of problems encountered in heat transfer.

ANALYSIS FEATURES

Heat Transfer in a Rotor with Circular Oil Holes

• 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

Conduction Through Pipe

• Specified nodal temperature
• Coupled temperatures
• Convection and Radiation

NONLINEAR CAPABILITIES

• Temperature dependent material properties
• Time and temperature dependent boundary conditions
  • Convention
  • Radiation
• Phase change (melting and freezing)
• Surface radiation with view factor calculation

Transient Heat Transfer Analysis with Convection in Printed Circuit Board

OUTPUT

• Nodal temperature time history
• Temperature gradients in shells
• Temperature distribution at specified time step
• Nodal heat values