Results 31 to 40 of about 3,077,819 (277)
Effects of the Wall Temperature on Rarefied Gas Flows and Heat Transfer in a Micro-Nozzle
Micromachines, 2023 When the satellite is in orbit, the thruster will experience drastic temperature changes (100–1000 K) under solar radiation, which will affect the rarefied gas flow state in the micro-nozzle structure of the cold gas micro-thruster.
Shurui Zhang +5 more
doaj +1 more source
Авіаційно-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
Entropy, 2017 The numerical study of continuum-rarefied gas flows is of considerable interest because it can provide fundamental knowledge regarding flow physics. Recently, the nonlinear coupled constitutive method (NCCM) has been derived from the Boltzmann equation ...
Ke Tang, Hong Xiao
doaj +1 more source
Aerodynamic optimization of NACA 0012 airfoils with attached Gurney flap in the rarefied gas flow
AIP Advances, 2023 The aerodynamic optimization of a Gurney flap attached to the NACA 0012 airfoil in rarefied gas flow is studied in this study. In order to investigate the effects of Gurney flap geometry (height, mounting angle, and mounting location) and angle of attack
Keren Lin +4 more
doaj +1 more source
A Diffusion Model for Rarefied Flows in Curved Channels [PDF]
Multiscale Modeling & Simulation, 2008 In this paper, we derive a one-dimensional convection-diffusion model for a rarefied gas flow in a two-dimensional curved channel on the basis of the Boltzmann (Bhatnagar–Gross–Krook) model. The flow is driven by the temperature gradient along the channel walls, which is known as the thermal creep phenomenon.
Kazuo Aoki +4 more
openaire +3 more sources
Optical Diagnostics in Rarefied Flows
Chinese Journal of Aeronautics, 2000 AbstractThis article reviews the instrumental developments accomplished at ONERA in order to perform precise non-intrusive measurements of hypersonic flows using laser- and electron-beam-based optical techniques. Point line of sight and imaging measurements are possible.
openaire +1 more source
Rarefied gas flow through a slit.
SHINKU, 1990 A rarefied gas flow through a slit in an infinite plane wall, induced by a small pressure difference across the slit, is studied on the basis of the kinetic theory. The system of integral equations for the macroscopic variables (the velocity, density, and temperature of the gas), derived from the linearized Boltzmann–Krook–Welander equation with the ...
HASEGAWA, Manabu, SONE, Yoshio
openaire +3 more sources
Nearly Free Molecular Heat Transfer from a Sphere [PDF]
, 1968 Consider a sphere immersed in a rarefied monatomic gas with zero mean flow. The distribution function of the molecules at infinity is chosen to be a Maxwellian. The boundary condition at the body is diffuse reflection with perfect accommodation to the
Schmulian, Robert Jay
core +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider +15 more
wiley +1 more source
Construction and Testing of a Rarefied Gas Flow Facility [PDF]
, 1967 A low-density gasdynamic facility, suitable for measurement of mass flow through small (approximately 1 mm diameter) nozzles, tubes, and orifices, was designed and constructed. The system is capable of producing and measuring mass flows at 100:1 upstream/
Henderson, Arnold Herbert +1 more
core +1 more source