Results 21 to 30 of about 2,677,322 (272)
Measurement of the heat transfer coefficient in gas spray cooling with low liquid flow rate [PDF]
E3S Web of Conferences, 2023 The rapid development of high power electronic, energy systems has led us to the fact that the performance of these systems is limited by their cooling capacity. Spray cooling is one of the most effective methods for cooling heated surfaces.
Sibiryakov Nikolay +2 more
doaj +1 more source
DSMC–LBM mapping scheme for rarefied and non-rarefied gas flows [PDF]
Journal of Computational Science, 2016 We present the formulation of a kinetic mapping scheme between the Direct Simulation Monte Carlo (DSMC) and the Lattice Boltzmann Method (LBM) which is at the basis of the hybrid model used to couple the two methods in view of efficiently and accurately simulate isothermal flows characterized by variable rarefaction effects. Owing to the kinetic nature
Gianluca Di Staso +3 more
openaire +4 more sources
Rarefied gas flows through meshes and implications for atmospheric measurements [PDF]
Annales Geophysicae, 2001 Meshes are commonly used as part of instruments for in situ atmospheric measurements. This study analyses the aerodynamic effect of meshes by means of wind tunnel experiments and numerical simulations. Based on the Direct Simulation Monte Carlo method,
J. Gumbel
doaj +1 more source
On the modelling of isothermal gas flows at the microscale [PDF]
, 2008 This paper makes two new propositions regarding the modelling of rarefied (non-equilibrium), isothermal gas flows at the micro scale. The first is a new test case for benchmarking high-order, or extended, hydrodynamic models for these flows.
Reese, Jason M., Lockerby, Duncan A.
core +5 more sources
Effect of viscosity on slip boundary conditions in rarefied gas flows
Vietnam Journal of Mechanics, 2019 The viscosity of gases plays an important role in the kinetic theory of gases and in the continuum-fluid modeling of the rarefied gas flows. In this paper we investigate the effect of the gas viscosity on the surface properties as surface gas ...
Nam T. P. Le
doaj +1 more source
Planetesimals in rarefied gas: wind erosion in slip flow [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT A planetesimal moves through the gas of its protoplanetary disc where it experiences a head wind. Though the ambient pressure is low, this wind can erode and ultimately destroy the planetesimal if the flow is strong enough. For the first time, we observe wind erosion in ground-based and microgravity experiments at pressures ...
Gerhard Wurm +5 more
openaire +2 more sources
Rarefied Poiseuille Flow in a Circular Tube [PDF]
EPJ 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
EFFECT OF VISCOUS HEAT GENERATION ON TEMPERATURE OF RAREFIED GAS MICROFLOWS DRIVEN BY MOVING SURFACE [PDF]
Journal 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
Particle-based hybrid and multiscale methods for nonequilibrium gas flows
Advances in Aerodynamics, 2019 Over the past half century, a variety of computational fluid dynamics (CFD) methods and the direct simulation Monte Carlo (DSMC) method have been widely and successfully applied to the simulation of gas flows for the continuum and rarefied regime ...
Jun Zhang +4 more
doaj +1 more source
Model Kinetic Equations for Multiply Ionized Gas Mixtures
Frontiers in Astronomy and Space Sciences, 2021 Model kinetic equations are proposed for the description of ionized monoatomic gas mixture flows. The mixtures are assumed enough rarefied to be treated as ideal gases after multiple ionization steps.
Maria A. Rydalevskaya +1 more
doaj +1 more source