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Mesoscopic simulation of diffusive contaminant spreading in gas flows at low pressure
Fluid Dynamics · Submitted 9 Sep 2015
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim In this contribution, we propose a novel efficient simulation approach for the simulation of two phase flows with a large concentration imbalance in a low pressure environment in the low intermediate Knudsen regime.
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The abstract, sentence by sentence
Many modern production and measurement facilities incorporate multiphase systems at low pressures. In this region of flows at small, non-zero Knudsen- and low Mach numbers the classical mesoscopic Monte Carlo methods become increasingly numerically costly. To increase the numerical efficiency of simulations hybrid models are promising. In this contribution, we propose a novel efficient simulation approach for the simulation of two phase flows with a large concentration imbalance in a low pressure environment in the low intermediate Knudsen regime. Our hybrid model comprises a lattice-Boltzmann method corrected for the lower intermediate Kn regime proposed by Zhang et al. for the simulation of an ambient flow field. A coupled event-driven Monte-Carlo-style Boltzmann solver is employed to describe particles of a second species of low concentration. In order to evaluate the model, standard diffusivity and diffusion advection systems are considered.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Many modern production and measurement facilities incorporate multiphase systems at low pressures. | background 1.00 | 0.04 | 0.01 | asserted 1.00 |
| s1 | In this region of flows at small, non-zero Knudsen- and low Mach numbers the classical mesoscopic Monte Carlo methods become increasingly numerically costly. | background 0.86 | 0.11 | 0.03 | asserted 0.98 |
| s2 | To increase the numerical efficiency of simulations hybrid models are promising. | background 0.87 | 0.05 | 0.09 | hedged possibility 0.93 |
| s3 | In this contribution, we propose a novel efficient simulation approach for the simulation of two phase flows with a large concentration imbalance in a low pressure environment in the low intermediate Knudsen regime. | contribution 1.00 | 0.87 | 0.32 | asserted 0.95 |
| s4 | Our hybrid model comprises a lattice-Boltzmann method corrected for the lower intermediate Kn regime proposed by Zhang et al. for the simulation of an ambient flow field. | method 0.95 | 0.47 | 0.08 | asserted 1.00 |
| s5 | A coupled event-driven Monte-Carlo-style Boltzmann solver is employed to describe particles of a second species of low concentration. | method 0.98 | 0.64 | 0.05 | asserted 1.00 |
| s6 | In order to evaluate the model, standard diffusivity and diffusion advection systems are considered. | method 0.92 | 0.72 | 0.05 | asserted 0.87 |
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The paper
Original abstract
Many modern production and measurement facilities incorporate multiphase systems at low pressures. In this region of flows at small, non-zero Knudsen- and low Mach numbers the classical mesoscopic Monte Carlo methods become increasingly numerically costly. To increase the numerical efficiency of simulations hybrid models are promising. In this contribution, we propose a novel efficient simulation approach for the simulation of two phase flows with a large concentration imbalance in a low pressure environment in the low intermediate Knudsen regime. Our hybrid model comprises a lattice-Boltzmann method corrected for the lower intermediate Kn regime proposed by Zhang et al. for the simulation of an ambient flow field. A coupled event-driven Monte-Carlo-style Boltzmann solver is employed to describe particles of a second species of low concentration. In order to evaluate the model, standard diffusivity and diffusion advection systems are considered.
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