Solver calculates the flow field using the mesh, boundary conditions, and calculation conditions defined in the Pre-processor. The user merely specifies the input file name/location. The calculation process can be monitored. The input data file created in HeatDesigner can be also used with the scSTREAM software.

#### High-speed Calculation

One of the principal advantages of HeatDesigner is its high calculation speed... just like scSTREAM. Thermal design frequently requires many "what if" studies. Therefore it is very important to obtain many results with minimal preprocessing and calculation time.

Fast calculation times also enable large models to be solved in acceptable times. This enables use of complicated CAD data with little or no modifications to the original CAD data.

--- Examples of Calculation Speed ---
1) LCD projector, 4,510,000 elements, 128 cycles, 4 hours and 28 minutes (Opteron885 2.6GHz)
2) DVD car navigation system, 3,530,000 elements, 128 cycles, 2 hours and 17 minutes (Pentium4 3.6GHz)
3) PCB, 690000 elements, 171 cycles, 30 minutes (AthlonMP 1.8GHz)

#### Monitoring Function

With this function, check to see if the analysis is progressing properly by monitoring the convergence, flow rate, and temperature in the middle of computational domain. The calculations can also be suspended and resumed.

#### Comparison of Calculational Functions of HeatDesigner and scSTREAM

 Calculational functions HeatDesigner scSTREAM Mesh Structured mesh Cartesian coordinate system ● ● Cylindrical coordinate system ● Unstructured mesh (Moving object) ● Numerical scheme Finite volume method ● ● Finite element method (Moving object) ● Mesh-related functions Periodic boundary ● Physical models Fluid Incompressible fluid ● ● Compressible fluid ● Steady/Unsteady ● ● Turbulence models Standard k-ε models ● ● High-Reynolds-Number 2 types Low-Reynolds-Number 1 type 2 type Algebraic stress model ● Temperature field two-equation 2 type Thermal analysis Conduction (solid/fluid) ● ● Convection heat transfer ● ● Turbulent heat transfer ● ● Radiation View factor ● ● Flux method ● Fan model ● ● Fin model ● ● Heat conduction panel (Consider radiation) ● ● Joule heat ● ● Humidity/Condensation ● Solar radiation ● Diffusion ● Solidification/Melting ● Free surface ● Multi-fluid flow ● Particle tracking ● Chemical reaction ● Combustion ● Thermal circuit model ● ● Function table Boundary condition ● ● User-defined functions ● Optimization* ● ● Calculation control environment On-line monitoring system ● ● Large scale calculation 100 million 1 billion Parallel computation* ● External program VB Interface ● ● Job management ● ●

Red: New functions of V10