Advanced Three-dimensional Two-phase Flow Simulation Tool for Application to Reactor Safety (ASTAR), Synthesis report
Project ID: FIKS-CT-2000-00050Funded under: FP5-EAECTP C
The ASTAR project was officially launched together with the EUROFASTNET (project FIKS-CT-2000-20100) concerted action project on 1 September 2000, for a duration of 36 months (extended to 39 months). The main objective of the ASTAR project was to substantially enhance the three-dimensional two-phase flow prediction capabilities of current Thermal-Hydraulic (TH) codes for safety relevant phenomena in present or future innovative Light Water Reactors (LWRs) (e.g. flow instabilities, steep gradients, critical heat flux, etc), by laying the scientific and technical basis for a new generation of codes for improved multidimensional two-phase flow simulation. This aim was to be achieved by further development and adaptation of state-of-the-art numerical techniques for transient two-phase flows allowing a high resolution of complex multi-dimensional flow processes, while taking into account industrial requirements such as code robustness and accuracy. It must be emphasized that successful simulation of physical diffusion and transfer processes can only be achieved by combining such models with high resolution schemes whose numerical diffusion is at least an order of magnitude lower than the physical diffusion. This is not possible with the present generation of codes whose numerical methods, though extremely robust, are overly diffusive and only first order accurate in space or time. These codes are also essentially one-dimensional in nature.
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Record Number: 8166 / Last updated on: 2006-11-09