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Stream

Solver is the part of the CFD program structure that uses the input data defined in the Pre-processor to calculate the thermal/fluid flow field. The user only specifies the name and location of the input file. The monitor function enables the user to observe the calculation status.

High-speed Computing

STREAM uses high-speed computing to complete an analysis in a short period of time. High-speed computing also enables STREAM to solve large-scale analyses in an acceptable time. This allows use of complicated CAD data with minimum modification and/or clean-up to the original CAD data.

--Computational Speed Examples--

1) Indoor Temperature and Heat: 520,000 elements 500 iterations: 1 hr 15 min
    (Pentium Xeon 3.06GHz)
2) Outdoor wind environment: 2,210,000 elements 200 iterations: 2 hr 43 min
   (Pentium Xeon 3.06GHz)
3) Bubble action in a tank 560,000 elements: 3000 iterations: 52 minutes
    (AthlonMP 2.13GHz)

Monitor Function

The Windows version of the STREAM Solver uses a monitoring function to indicate the status of the calculations process. The status of basic monitoring indicators can be observed in real-time or the process can be interrupted to confirm more detailed velocity and temperature developments within the calculation domain. Batch processing can be resumed at any time.

Monitor Function

Parallel computing

STREAM's parallel solver is available for further reducing computation time. The increased speed of parallel solvers is especially valuable for large scale models and for transient calculations. The parallel solver is available in various configurations and is optimized for each supported computer Operating System (OS). The Windows version of the parallel solver can be used in the same manner as the standard Windows solver. This enables the user to use parallel technology without any extra knowledge about parallel computing.

STREAM V3.14/V6 machine (2 million elements)
VT64 Server 8200

Solver Functional List

Mesh	Structured mesh	Cartesian or cylindrical coordinate system
Mesh	Unstructured mesh	Moving element
Numerical scheme	Analysis method	Finite volume method, finite element method inside moving element
	Analysis method	Pressure-correction Method (SIMPLEC)
	Accuracy of convective terms	1st / 3rd order (QUICK) upwind scheme
	Matrix solver	JACOBI, SOR, MICCG, ILUCR, ILUCGS, FMGCG
Mesh-related functions	Triangular prism element
	Opening ratio, Fluid volume fraction
	Periodic boundary condition
Physical models	Compressible / Incompressible fluid
	Steady-state / Transient analysis
	Turbulent model	Standard k-Îµ , RNG k-Îµ , MP k-Îµ , Algebraic stress model , Linear low-Reynolds-Number k-Îµ model (AKN model) , Non-linear low-Reynolds-Number k-Îµ model (AKN model) , Temperature field two-equation (NK / AKN) model
	Free surface	VOF method, MARS method
	Thermal analysis	Conduction (fluid/solid), Convection, Turbulent heat transfer
	Radiation	View factor method, Flux method
	Moving element
	Solar radiation
	Humidity / Condensation	Consideration on evaporation, latent heat
	Air conditioner model
	Ventilation efficiency	Age, Contribution ratio
	Diffusion	SORET effect, Mutual diffusion, Change in specific heat / viscosity
	Solidification / Melting
	Marangoni convection
	Non-newtonian fluid
	Multiple-fluid flow
	Rotating fan model	Axial, Conical, Centrifugal
	Particle tracking	Marker particle, Mass particle (with turbulent diffusion)
	Static magnetic field	Electric current analysis
	Chemical reaction
	Combustion
	Multiphase flow analysis	MARS method
	Porous media
	Heat conduction panel
	User-defined function
Calculation control	On-line monitoring system for obtaining calculation status
Calculation control	Job management

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