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Träfflista för sökning "L773:1558 0792 OR L773:1053 5888 srt2:(2015-2019)"

Sökning: L773:1558 0792 OR L773:1053 5888 > (2015-2019)

  • Resultat 11-16 av 16
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11.
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12.
  • Yu, Peng, et al. (författare)
  • Coupled Thermo-Mechanical Creep Analysis For A Nordic BWR Lower Head Using Non-Homogeneous Debris Bed Configuration From MELCOR
  • 2018
  • Konferensbidrag (refereegranskat)abstract
    • We present a coupled thermo-mechanical creep analysis for a Nordic BWR lower head with a non-homogeneous debris bed configuration generated with MELCOR code. A one-way coupling approach was adopted which uses the Phase-Change Effective Convectivity Model implemented in Fluent to simulate the convective heat transfer in the melt pool and the ANSYS Mechanical to simulate the vessel wall deformation induced by the thermal and mechanical load from the debris. An initial non-homogeneity of debris bed was estimated using MELCOR core relocation simulation results specifying the mass of each component (UO2/Zr/ZrO2/SS/SSOX) and temperature in each MELCOR cell of the lower head. A mapping scheme was designed to transfer this non-homogeneities debris bed to Fluent through User Defined Functions. All components were locally treated in Fluent as one ideal phase by averaging the weights of element-specific mass fractions inside each cell. Material properties (density, heat capacity, etc.) and volumetric heat in the debris were both spatial- and temperature-dependent. Meanwhile, additional simulations using homogeneous debris bed configuration but with the same amount of mass compositions were run for comparison. Results including temperature escalation, vessel failure timing and location were analyzed and compared.
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15.
  • Rupp, R., et al. (författare)
  • On the stable rank and reducibility in algebras of real symmetric functions
  • 2010
  • Ingår i: Mathematische Nachrichten. - : Wiley. - 0025-584X .- 1522-2616. ; 283:8, s. 1194-1206
  • Tidskriftsartikel (refereegranskat)abstract
    • Let A(R) ((D) over bar) denote the set of functions belonging to the disc algebra having real Fourier coefficients. We show that A(R) ((D) over bar) has Bass and topological stable ranks equal to 2, which settles the conjecture made by Brett Wick in [18]. We also give a necessary and sufficient condition for reducibility in some real algebras of functions on symmetric domains with holes, which is a generalization of the main theorem in [18]. A sufficient topological condition on the symmetric open set D is given for the corresponding real algebra A(R) ((D) over bar) to have Bass stable rank equal to 1. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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16.
  • Witakowski, Witold, 1949- (författare)
  • The Magi in Syriac tradition
  • 2008
  • Ingår i: <em>Malphono w-Rabo d-Malphone: Studies in Honor of Sebastian P. Brock</em>. - Piscataway : Gorgias Press. ; , s. 809-843
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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