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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Modeling a divertor with mid-leg pumping for high-power H-mode scenarios in DIII-D considering E x B drift flows
Edge-plasma simulations of a baffled, long-legged divertor in DIII-D, performed using the multi-fluid code UEDGE, indicate that the position of the detachment front is constrained to the location of the pump duct along the low-field side (LFS) baffle. Simulations including magnetic and E x B drifts were performed for 12.5 MW deuterium plasmas including intrinsic carbon and seeded neon to assess the optimal location of the LFS divertor pump to create a stable detachment front between the target and the X-point. The radiation front position in the simulations, taken to be indicative of the detachment front, can be controlled between the pump and X-point in the favorable magnetic field direction for H-mode access by moving the pump duct location upstream of the target along the LFS baffle. In the unfavorable magnetic field direction, the radial E θ x B drift flows are directed towards the pumping surface, efficiently removing the injected deuterium gas and limiting the sensitivity of the radiation front location to the gas injection rate. The role of pumping rate and drift direction on the pumping efficiency are also found to affect the divertor plasma conditions and detachment front location in UEDGE simulations.
Modeling of fuel-cladding stresses in porous UC/SIC fuel pins
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Modeling and simulation of a High Flux Isotope Reactor representative core model for updated performance and safety basis assessments
Not Available
Thermal Modeling of an eVinci™-like heat pipe microreactor using OpenFOAM
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Experimental and finite element modelling evaluation of cement integrity under diametric compression
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Modeling interconnections of safety and financial performance of nuclear power plants, Part 2: Methodological developments and case study
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Constitutive modeling of elastomers during photo- and thermo-oxidative aging
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Modeling water diffusion in polybenzimidazole membranes using partial immobilization and free volume theory
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Intracellular metabolism analysis of Clostridium cellulovorans via modeling integrating proteomics, metabolomics and fermentation
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