Results 21 to 30 of about 1,134,345 (204)

Algebraic Bethe Ansatz for O(2N) sigma models with integrable diagonal boundaries [PDF]

open access: yes, 2016
The finite volume problem of O(2N) sigma models with integrable diagonal boundaries on a finite interval is investigated. The double row transfer matrix is diagonalized by Algebraic Bethe Ansatz.
Gombor, Tamas, Palla, Laszlo
core   +3 more sources

An algebraic approach to the minimum-cost multi-impulse orbit transfer problem [PDF]

open access: yes, 2015
We present a purely algebraic formulation (i.e. polynomial equations only) of the minimum-cost multi-impulse orbit transfer problem without time constraints, while keeping all the variables with a precise physical meaning.
Avendano, Martin   +3 more
core   +3 more sources

Numerical approximations for fluid flow and heat transfer in the boundary layer with radiation through multiple Lie similarity transformations

open access: yesFrontiers in Physics, 2023
The dependent or independent variables of differential equations may be reduced by applying its associated Lie point symmetries. Seven-dimensional Lie point symmetry algebra exists for differential equations representing heat transfer in a boundary layer
Muhammad Bilal   +10 more
doaj   +1 more source

A Reduced Basis Method for Radiative Transfer Equation [PDF]

open access: yesJournal of Scientific Computing, 2022
Linear kinetic transport equations play a critical role in optical tomography, radiative transfer and neutron transport. The fundamental difficulty hampering their efficient and accurate numerical resolution lies in the high dimensionality of the physical and velocity/angular variables and the fact that the problem is multiscale in nature.
Zhichao Peng   +3 more
openaire   +4 more sources

Thermal Characteristics of a Stratospheric Airship with Natural Convection and External Forced Convection

open access: yesInternational Journal of Aerospace Engineering, 2019
Though convective heat transfer is one of the main factors that dominate the thermal characteristics of stratospheric airships, there is no specific correlation equations for the calculation of convective heat transfer of airships. The equations based on
Tong Zhang   +5 more
doaj   +1 more source

Differential quadrature discrete time transfer matrix method for vibration mechanics

open access: yesAdvances in Mechanical Engineering, 2019
Transfer matrix method is a practical technology for vibration analysis of engineering mechanics. In this article, a new version of mixed differential quadrature discrete time transfer matrix method is presented for simulating vibrations. First, ordinary
Xue Rui, Guoping Wang, Bin He
doaj   +1 more source

MHD boundary layer flow and heat transfer over an exponentially stretching sheet embedded in a thermally stratified medium

open access: yesAlexandria Engineering Journal, 2013
MHD boundary layer flow and heat transfer towards an exponentially stretching sheet embedded in a thermally stratified medium subject to suction are presented in this analysis.
Swati Mukhopadhyay
doaj   +1 more source

Linear Orbit Parameters for the Exact Equations of Motion [PDF]

open access: yes, 1994
This paper defines the beta function and other linear orbit parameters using the exact equations of motion. The orbit functions are redefined using the exact equations. Expressions are found for the transfer matrix and the emittances.
Parzen, G.
core   +4 more sources

A Nonlinear Moment Model for Radiative Transfer Equation [PDF]

open access: yesMultiscale Modeling & Simulation, 2021
We derive a nonlinear moment model for radiative transfer equation in 3D space, using the method to derive the nonlinear moment model for the radiative transfer equation in slab geometry. The resulted 3D HMPN model enjoys a list of mathematical advantages, including global hyperbolicity, rotational invariance, physical wave speeds, spectral accuracy ...
Ruo Li, Peng Song, Lingchao Zheng
openaire   +3 more sources

Thermal analysis of moving porous fin wetted by hybrid nanofluid with trapezoidal, concave parabolic and convex cross sections

open access: yesCase Studies in Thermal Engineering, 2022
In this study, the thermal performance of moving porous fin wetted with hybrid nanofluid with different cross-sections in the presence of a magnetic field is investigated.
S. Hosseinzadeh   +3 more
doaj   +1 more source

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