1,721,039 research outputs found
Advanced Methods for the Evaluation of the Heat Flux Distribution onto the First Wall of a Tokamak
No full textComputational thermal fluid dynamic analysis of Hypervapotron heat sink for high heat flux devices application
No full textn fusion devices, plasma is the environment in which light elements fuse producing energy. More than 20% of this power reaches the surface of plasma facing components (e.g. The divertor targets, first wall), where the heat flux local value can be several MW/m2. In order to handle such heat fluxes several coolants are proposed such as water, helium and liquid metals along with different heat sink devices, such as Swirl tubes, Hypervapotrons, Jet cooling, Pin-fins, etc. Among these, Hypervapotron concept, operating in highly subcooled boiling regime with water as a coolant is considered as one of the potential candidates. In this paper, a Computational Fluid Dynamic (CFD) approach is used to analyze the boiling flow inside Hypervapotron channel using two different boiling models: Rohsenow boiling model and Transition boiling model, these models are available in the commercial CFD code STARCCM+, and uses Volume of Fluid approach for the multiphase flow analysis. They are benchmarked using experimental data obtained from experiments conducted at Joint European Torus, UK. The simulated results are then compared with each other and also with other simulated data available to test the quantitative, qualitative features of boiling models in modeling nucleate as well as hard boiling regime
Multidimensional Flow Modelling of the compression test of a Gaede Pump Stage in the Viscous Regime
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navier-stokes modeling of a gaede pump stage in the viscous and transitional flow regimes using slip-flow boundary conditions
No full textTritium Inventory Evaluations for the Ignitor Experimental Reactor
No full textTritium Inventory Evaluations for the Ignitor Experimental Reacto
A 2-D fluid model of the scrape-off layer (SOL) using adaptive unstructured Finite Volumes
No full textNumerical solution of a 2-D conduction-convection-radiation model problem in divertor geometry using adaptive finite elements
No full textSome of the essential features of plasma transport in the tokamak edge with realistic divertor geometry are simulated using adaptive finite elements to solve a time-dependent scalar anisotropic conduction-convection-radiation problem. Solutions are compared with those obtained on fixed finite element mesh and typically show comparable accuracy at a much lower cost or much better accuracy at comparable cost
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