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نمایش تعداد 1-10 از 245
Vertical Structure of Advection-Dominated Accretion Flows
We solve the set of hydrodynamic equations for optically thin advection-dominated accretion flows by assuming a
radially self-similar spherical coordinate system (r, q, f). The disk is considered to be in steady state and...
Exact analytical solutions for ADAFs
We obtain two-dimensional exact analytic solutions for the structure of the hot accretionflows without wind. We assume that the only non-zero component of the stress tensor is Trϕ.Furthermore, we assume that the value of ...
Discretization Method of Hydrodynamic Equations for Simulation of GaN MESFETs
DISCRETIZION METHOD OF HYDRODYNAMIC EQUATIONS FOR SIMULATION OF GaN MESFETs
A finite discretization method in two dimensions has been developed and used to model electron transport in wurtzite phase GaN MESFETs....
Post-Newtonian Jeans analysis
The Jeans analysis is studied in the first post-Newtonian limit. In other words, the relativistic effects on local gravitational instability are considered for systems whose characteristic velocities and corresponding ...
Fourier Analysis of Advection-dominated Accretion Flows
We implement a new semi-analytical approach to investigate radially self-similar solutions for the steady-state advection-dominated accretion flows (ADAFs). We employ the usual α-prescription for the viscosity, and all ...
Local fragmentation of thin discs in Eddington-inspired gravity
We find the generalized version of the Toomre’s criterion for the stability of a rotating thin
disc in the context of Eddington-inspired Born-Infeld (EiBI) gravity that possesses one free
parameter χ . To do ...
Post-Newtonian Corrections to Toomreʼs Criterion
The gravitational stability of a two-dimensional self-gravitating and differentially rotating gaseous disk in the
context of post-Newtonian (PN) theory is studied. Using the perturbative method and applying the ...
Accretion flows with comparable radiation and gas pressures
to solve the set of radiation hydrodynamic equations in steady state and axisymmetric configuration, we employ self-similar technique in the radial direction. We need the reflection symmetry about the mid-plane to find gas density at the equator. For a...
A Comparison Between Hydrodynamic and Monte Carlo Model Characteristics of n+ -i(n)- n+ Diode Based on InP Material
Abstract— We performed a two-dimensional ensemble
Monte Carlo simulation of a n+
-i(n)-n+
diode based on InP
material in comparison with hydrodynamic model.
Scattering processes taken into account...