Results 21 to 30 of about 25,025 (293)

Acceleration Waves in Rational Extended Thermodynamics of Rarefied Monatomic Gases

open access: yesFluids, 2020
Rational Extended Thermodynamics theories with different number of moments are usually introduced to study non-equilibrium phenomena in rarefied gases. Here, we use them to describe one-dimensional acceleration waves in a rarefied monatomic gas.
Francesca Brini, Leonardo Seccia
doaj   +1 more source

On deterministic approximation of the Boltzmann equation in a bounded domain [PDF]

open access: yes, 2011
In this paper we present a fully deterministic method for the numerical solution to the Boltzmann equation of rarefied gas dynamics in a bounded domain for multi-scale problems.
Filbet, Francis
core   +5 more sources

EFFECT OF VISCOUS HEAT GENERATION ON TEMPERATURE OF RAREFIED GAS MICROFLOWS DRIVEN BY MOVING SURFACE [PDF]

open access: yesJournal of Engineering Science and Technology, 2018
Good understanding of the gas flow under rarefied conditions is important for designing the micro-electro-mechanical systems. The Navier-Stokes-Fourier equations with the slip and jump conditions can capture the rarefied gas flows in the slip regime.
NAM T. P. LE, THOAI N. TRAN
doaj  

Detection of ammonia gas by Knudsen thermal force in micro gas actuator

open access: yesCase Studies in Thermal Engineering, 2018
Direct Simulation Monte Carlo (DSMC) method is applied to evaluate the performance of a new micro gas sensor (MIKRA) for mass analysis of ammonia in the rarefied gas.
Ahmadreza Mahyari   +3 more
doaj   +1 more source

Features of calculation and modeling of flow of rotors and pucher propellers for aerial vehicle in the condition of very rarefied atmosphere

open access: yesАвіаційно-космічна техніка та технологія, 2022
This article presents the structure of designing and modeling the flow of rotors and pusher propellers in a highly rarefied atmosphere. The aerodynamic characteristics of an airfoil are key factors in determining design accuracy and performance ...
Mykola Kulyk   +4 more
doaj   +1 more source

Rarefied Poiseuille Flow in a Circular Tube [PDF]

open access: yesEPJ Web of Conferences, 2019
An isothermal rarefied gas flow through a long circular tube due to longitudinal pressure gradient (a three-dimensional Poiseuille problem) was studied using the linearized Bhatnagar-Gross-Krook model kinetic equation over the whole range of the Knudsen ...
Germider Oksana, Popov Vasily
doaj   +1 more source

INVARIANT IMBEDDING AND RAREFIED GAS DYNAMICS [PDF]

open access: yesProceedings of the National Academy of Sciences, 1963
Invariance principles and invariant imbedding techniques are applied to representative problems in the kinetic theory of gases. The problem of plane shear flow between two infinite flat plates is used to present the ideas of invariant imbedding in the context of rarefied gas dynamics.
Aroesty, J.   +3 more
openaire   +2 more sources

Molecular dynamics study on scattering characteristics of nitrogen molecules from platinum surface by molecular beam method

open access: yesAIP Advances, 2020
Rarefied gas flow has received wide attention due to the booming of micro/nano-electromechanical systems and aerospace engineering. Under such rarefied conditions, the frequency of intermolecular collisions is sharply reduced, so the impacts of ...
Hang Yu, Ye Zhang, Fan Yang, Hua Li
doaj   +1 more source

A thermal lattice Boltzmann model for micro/nano-flows [PDF]

open access: yes, 2008
The dynamic behavior of charged micro and nanofluids plays a crucial role in a large variety of industrial and biological processes. Such dynamic behavior is characterized by the simultaneous occurrence of several competing mechanisms, such as ...
Barber, Robert W.   +3 more
core   +2 more sources

Quantum Dew [PDF]

open access: yes, 1999
We consider phase separation in nonequilibrium Bose gas with an attractive interaction between the particles. Using numerical integrations on a lattice, we show that the system evolves into a state that contains drops of Bose-Einstein condensate ...
A. Kusenko   +32 more
core   +2 more sources

Home - About - Disclaimer - Privacy