Density Gradient Instability in Hall Thrusters



Density functional and dynamics study of the dissociative adsorption of hydrogen on Mg (0001) surface
Kecik, D.; Aydınol, Mehmet Kadri (Elsevier BV, 2009-01-15)
A first principles study is performed to investigate the adsorption characteristics of hydrogen on magnesium surface. Substitutional and on-surface adsorption energies are calculated for Mg (0001) surface alloyed with the selected elements. To further analyze the hydrogen-magnesium interaction, first principles molecular dynamics method is used which simulates the behavior of H-2 at the surface. Also, charge density differences of substitutionally doped surface configurations were illustrated. Accordingly, ...
Density functional theory calculations for mercury fulminate
Turker, L; Erkoç, Şakir (Elsevier BV, 2004-12-31)
The structural and electronic properties of isolated neutral mercury fulminate molecule (C2N2O2Hg) have been investigated by performing density functional theory calculations at B3LYP level. The optimum geometry, vibrational frequencies, electronic structure, and some thermodynamical values of the molecule considered have been obtained in its ground state.
Density functional theory investigation of two-dimensional dipolar fermions in a harmonic trap
Toffoli, Hande; TANATAR, BİLAL (2014-08-13)
We investigate the behavior of polarized dipolar fermions in a two-dimensional harmonic trap in the framework of the density functional theory (DFT) formalism using the local density approximation. We treat only a few particles interacting moderately. Important results were deduced concerning key characteristics of the system such as total energy and particle density. Our results indicate that, at variance with Coulombic systems, the exchangecorrelation component was found to provide a large contribution to...
Density functional theory investigation on thickness and load dependency of friction force between graphene and au interfaces
Şentürk, Duygu Gizem; Toffoli, Hande; Department of Physics (2018)
As the investigation of materials at nano scale become possible with today's technology it is observed that some physical phenomenons have different characteristics at atomistic scale than macroscopic one because of the quantum mechanical effects. One of these physical processes that differs at nano scale is the friction force. While it is expected that the friction force to be independent of contact area and velocity according to Amontos-Coulomb laws, it was observed that it changes by the effect of some p...
Density estimation in large-scale wireless sensor networks
Eroğlu, Alperen; Onur, Ertan; Oğuztüzün, Mehmet Halit S.; Department of Computer Engineering (2015)
Density estimation is a significant problem in large-scale wireless ad-hoc networks since the density drastically impacts the network performance. It is crucial to make the network adaptive in the run-time to the density changes that may not be predictable in advance. Local density estimators are required while taking run-time control decisions to improve the network performance. A wireless node may estimate the density locally by measuring the received signal strength (RSS) of packets sent by its neighbour...
Citation Formats
S. Çakır and İ. Rafatov, “Density Gradient Instability in Hall Thrusters,” St. Petersburg, 2015, Accessed: 00, 2021. [Online]. Available: