Topic
Knudsen number
About: Knudsen number is a research topic. Over the lifetime, 5052 publications have been published within this topic receiving 104278 citations.
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TL;DR: In this article, the performance of the micro sensor of MIKRA for the detection of the hydrogen in the mixture has been evaluated and reliable correlations for the estimation of the Knudsen force are presented to determine the efficiency of the sensor in various operating conditions.
63 citations
TL;DR: A class of asymptotic-preserving (AP) schemes for the nonhomogeneous Fokker-Planck-Landau (nFPL) equation that overcome the stiffness of the collision operator in the fluid regime, and can capture the fluid dynamic limit without numerically resolving the small Knudsen number.
63 citations
TL;DR: In this paper, the applicability of the Direct Simulation Monte Carlo (DSMC) method to the fluid and thermal analysis of microelectromechanical systems (MEMS) is explored.
Abstract: We explore the applicability of the Direct Simulation Monte Carlo (DSMC) method to the fluid and thermal analysis of microelectromechanical systems (MEMS). Flows in two-dimensional microchannels are investigated because they represent basic geometrical components of MEMS. Supersonic, subsonic, and pressure-driven, low-speed flows are simulated by DSMC in microchannels of varying aspect ratios for a range of continuum to transitional regime rarefied flows. Both hot and ambient wall temperature cases are presented. The results are strongly dependent on Knudsen number and channel aspect ratio. They are in qualitative agreement with other computational and experimental results for longer microchannels.
63 citations
TL;DR: In this article, the bipolar diffusion charging mechanism of long fibrous or chain-like aerosol particles is discussed and compared numerically, and a "charging equivalent diameter" DQE is introduced, which leads to a particularly simple expression for the Boltzmann charge distribution.
63 citations
TL;DR: In this article, a Discrete Element Method (DEM) for the evaluation of the effective thermal conductivity of pebble beds in fusion blankets is presented, to the best of our knowledge, for the first time in a DEM code.
63 citations