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When a plasma sheath forms next to a dielectric wall, material properties determine electron absorption and reflection from the surface, impacting the sheath formation and structure. The low energy regime of this interaction is often not…

等离子体物理 · 物理学 2024-03-14 Kolter Bradshaw , Petr Cagas , Ammar Hakim , Bhuvana Srinivasan

We study a 1D geometry of a plasma confined between two conducting floating walls with applications to laboratory plasmas. These plasmas are characterized by a quasi-neutral bulk that is joined to the wall by a thin boundary layer called…

数值分析 · 数学 2023-01-02 Louis Reboul , Marc Massot , Alejandro Alvarez Laguna

The level-set method is a popular interface tracking method in two-phase flow simulations. An often-cited reason for using it is that the method naturally handles topological changes in the interface, e.g. merging drops, due to the implicit…

流体动力学 · 物理学 2014-09-29 Åsmund Ervik , Karl Yngve Lervåg , Svend Tollak Munkejord

Level set-based immersed boundary techniques operate on nonconforming meshes while providing a crisp definition of interface and external boundaries. In such techniques, an isocontour of a level set field interpolated from nodal level set…

计算工程、金融与科学 · 计算机科学 2020-07-15 Jorge L. Barrera , Kurt Maute

A new concept for the higher-order accurate approximation of partial differential equations on manifolds is proposed where a surface mesh composed by higher-order elements is automatically generated based on level-set data. Thereby, it…

数值分析 · 计算机科学 2017-10-11 T. P. Fries , D. Schöllhammer

Modeling plasmas in terms of atoms or ions is theoretically appealing for several reasons. When it is relevant, the notion of atom or ion in a plasma provides us with an interpretation scheme of the plasma's microscopic structure. From the…

等离子体物理 · 物理学 2024-12-18 Robin Piron

In this work, we introduce and study parallel-plate-waveguide structures that are formed by two penetrable metasurfaces having arbitrary sheet impedances. We investigate the guided modes which can propagate in such structures and derive the…

应用物理 · 物理学 2019-01-16 X. Ma , M. S. Mirmoosa , S. A. Tretyakov

Multifluid simulations of plasma sheaths are increasingly used to model a wide variety of problems in plasma physics ranging from global magnetospheric flows around celestial bodies to plasma-wall interactions in thrusters and fusion…

等离子体物理 · 物理学 2021-02-03 Petr Cagas , Ammar Hakim , Bhuvana Srinivasan

This note establishes several integral identities relating certain metric properties of level hypersurfaces of Morse functions.

微分几何 · 数学 2023-08-29 Pisheng Ding

We calculate the first correction beyond proximity force approximation for a cylindrical graphene sheet in interaction with a flat graphene sheet or a dielectric half space.

量子物理 · 物理学 2008-11-26 M. Bordag

We construct the approximate solutions to the Vlasov--Poisson system in a half-space, which arises in the study of the quasi-neutral limit problem in the presence of a sharp boundary layer, referred as to the plasma sheath in the context of…

数学物理 · 物理学 2024-01-17 Chang-Yeol Jung , Bongsuk Kwon , Masahiro Suzuki , Masahiro Takayama

This contribution, built on the companion paper [1], is focused on the different mathematical approaches available for the analysis of the quasilinear approximation in plasma physics.

偏微分方程分析 · 数学 2020-11-17 Claude Bardos , Nicolas Besse

Three-dimensional (3D) etching of materials by plasmas is an ultimate challenge in microstructuring applications. A method is proposed to reach a controllable 3D structure by using masks in front of the surface in a plasma etch reactor in…

等离子体物理 · 物理学 2023-11-16 E. Jüngling , S. Wilczek , T. Mussenbrock , M. Böke , A. von Keudell

We present a computational scheme that derives a global polynomial level set parametrisation for smooth closed surfaces from a regular surface-point set and prove its uniqueness. This enables us to approximate a broad class of smooth…

An accurate implicit description of geometries is enabled by the level-set method. Level-set data is given at the nodes of a higher-order background mesh and the interpolated zero-level sets imply boundaries of the domain or interfaces…

数值分析 · 计算机科学 2017-06-05 T. P. Fries , S. Omerović , D. Schöllhammer , J. Steidl

A new higher-order accurate method is proposed that combines the advantages of the classical $p$-version of the FEM on body-fitted meshes with embedded domain methods. A background mesh composed by higher-order Lagrange elements is used.…

数值分析 · 计算机科学 2016-04-04 Samir Omerović , Thomas-Peter Fries

We compute time-dependent solutions of the sharp-interface model of dendritic solidification in two dimensions by using a level set method. The steady-state results are in agreement with solvability theory. Solutions obtained from the level…

材料科学 · 物理学 2009-10-31 Yung-Tae Kim , Nigel Goldenfeld , Jonathan Dantzig

We present an approach for computing extensions of velocities or other fields in level set methods by solving a biharmonic equation. The approach differs from other commonly used approaches to velocity extension because it deals with the…

数值分析 · 数学 2017-05-01 Timothy J. Moroney , Dylan R. Lusmore , Scott W. McCue , D. L. Sean McElwain

The present manuscript summarizes the modern view on the problem of the graphene-metal interaction. Presently, the close-packed surfaces of d metals are used as templates for the preparation of highly-ordered graphene layers. Different…

材料科学 · 物理学 2017-08-23 E. N. Voloshina , Yu. S. Dedkov

A metadata schema, named Plasma-MDS, is introduced to support research data management in plasma science. Plasma-MDS is suitable to facilitate the publication of research data following the FAIR principles in domain-specific repositories…

等离子体物理 · 物理学 2020-12-22 Steffen Franke , Lucian Paulet , Jan Schäfer , Deborah O'Connell , Markus M. Becker