يعرض 1 - 20 نتائج من 106 نتيجة بحث عن '"Open boundary condition"', وقت الاستعلام: 0.77s تنقيح النتائج
  1. 1
  2. 2
    Academic Journal
  3. 3
    Academic Journal

    المساهمون: François, Grégoire, Angeli, Celestino, Bendazzoli, Gian Luigi, Brumas, Véronique, Evangelisti, Stefano, Berger, J. Arjan

    مصطلحات موضوعية: The electric polarizability and the spread of the total position tensors are used to characterize the metallic vs insulator nature of large (finite) systems. Finite clusters are usually treated within the open boundary condition formalism. This introduces border effects, which prevent a fast convergence to the thermodynamic limit and can be eliminated within the formalism of periodic boundary conditions. Recently, we introduced an original approach to periodic boundary conditions, named Clifford boundary conditions. It considers a finite fragment extracted from a periodic system and the modification of its topology into that of a Clifford torus. The quantity representing the position is modified in order to fulfill the system periodicity. In this work, we apply the formalism of Clifford boundary conditions to the case of carbon nanotubes, whose treatment results in a particularly simple zigzag geometry. Indeed, we demonstrate that at the Hückel level, these nanotubes, either finite or periodic, are formally equivalent to a collection of non-interacting dimerized linear chains, thus simplifying their treatment. This equivalence is used to describe some nanotube properties as the sum of the contributions of the independent chains and to identify the origin of peculiar behaviors (such as conductivity). Indeed, if the number of hexagons along the circumference is a multiple of three, a metallic behavior is found, namely a divergence of both the (per electron) polarizability and total position spread of at least one linear chain. These results are in agreement with those in the literature from tight-binding calculations

    وصف الملف: STAMPA

    Relation: info:eu-repo/semantics/altIdentifier/pmid/37671957; info:eu-repo/semantics/altIdentifier/wos/WOS:001138793200002; volume:159; issue:9; firstpage:094106-1; lastpage:094106-12; numberofpages:12; journal:THE JOURNAL OF CHEMICAL PHYSICS; https://hdl.handle.net/11392/2537216

  4. 4
    Academic Journal
  5. 5
  6. 6
    Academic Journal

    المؤلفون: Van Thinh Nguyen, Minjae Lee

    المصدر: Water; Volume 12; Issue 6; Pages: 1706

    جغرافية الموضوع: agris

    وصف الملف: application/pdf

    Relation: Hydraulics and Hydrodynamics; https://dx.doi.org/10.3390/w12061706

  7. 7
    Academic Journal
  8. 8
    Academic Journal
  9. 9
    Academic Journal

    المساهمون: Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics, Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor

    وصف الملف: 12 p.

    Relation: https://www.witpress.com/elibrary/cmem-volumes/6/1/1971; info:eu-repo/grantAgreement/MINECO/1PE/ ENE2014-60577-R; info:eu-repo/grantAgreement/MINECO/1PE/ ENE2015-70672-P; Gutiérrez, E. [et al.]. On the solution of the problem of a drop falling against a plane by using a level set-moving mesh-immersed boundary method. "International journal of computational methods and experimental measurements", 2018, vol. 6, núm. 1, p. 208-219.; http://hdl.handle.net/2117/130414

  10. 10
    Academic Journal
  11. 11
    Academic Journal
  12. 12
    Academic Journal

    المساهمون: Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics, Universitat Politècnica de Catalunya. CREMIT - Centre de Recerca de Motors i Instal·lacions Tèrmiques, Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor

    وصف الملف: 20 p.

    Relation: http://www.sciencedirect.com/science/article/pii/S0009250917301264; Gutierrez, E., Balcazar, N., Bartrons, E., Rigola, J. Numerical study of Taylor bubbles rising in a stagnant liquid using a level-set/moving-mesh method. "Chemical engineering science", 8 Juny 2017, vol. 164, p. 158-177.; http://hdl.handle.net/2117/105970

  13. 13
    Academic Journal
  14. 14
    Conference

    المساهمون: Institut universitaire des systèmes thermiques industriels (IUSTI), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Transferts, écoulements, fluides, énergétique (TREFLE), Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS), Service de Thermo-hydraulique et de Mécanique des Fluides (STMF), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, SFT

    المصدر: Congrès Français de Thermique SFT2010 ; https://hal.science/hal-04108238 ; Congrès Français de Thermique SFT2010, May 2010, Le Touquet, France. 2010

    جغرافية الموضوع: Le Touquet, France

    Time: Le Touquet, France

  15. 15
    Academic Journal
  16. 16
  17. 17

    المؤلفون: Bozonnet, Cyril

    المساهمون: Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] (LEGI), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Université Grenoble Alpes [2020-....], Guillaume Balarac, Olivier Desjardins, STAR, ABES

    المصدر: Materials Science [cond-mat.mtrl-sci]. Université Grenoble Alpes [2020-..], 2021. English. ⟨NNT : 2021GRALI056⟩

    وصف الملف: application/pdf

  18. 18
    Academic Journal
  19. 19
  20. 20