Showing papers in "Journal of Chemical Engineering of Japan in 2013"
153 citations
41 citations
TL;DR: In this paper, a front-tracking method is used to simulate solidification with volume change of a droplet on a cooling plate, where the velocity of the liquid-air front is calculated from the normal temperature gradient across the front and the latent heat.
Abstract: We use a front-tracking method to simulate solidi cation with volume change of a droplet on a xed cooling plate. The problem includes temporal evolution of three interfaces, i.e., solid–liquid, solid–air, and liquid–air, that are explicitly tracked under the assumption of axisymmetry. The solid–liquid interface is propagated with a normal velocity that is calculated from the normal temperature gradient across the front and the latent heat. The liquid–air front is advected by the velocity interpolated from nearest bulk uid ow velocities. Accordingly, the evolution of the solid–air front is simply the temporal imprint of the triple point at which simple and straightforward conditions are imposed. The governing Navier–Stokes equations are solved for the whole domain, setting the velocities in the solid phase to zero and with the non-slip condition on the solid–liquid interface. Computational results are compared with exact solutions for twodimensional Stefan problems and with corresponding experimental results, and show good agreement.
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TL;DR: In this article, a passive micromixer with wavy channel walls with a sinusoidal variation is proposed, and numerical simulations based on Navier-Stokes equations are carried out for Reynolds numbers.
Abstract: Keywords: Micromixer, Sinusoidal Walls, Mixing Index, Dean Vortices, Navier–Stokes Equations, Reynolds NumberA passive micromixer with wavy channel walls with a sinusoidal variation is proposed, and numerical simulations based on Navier–Stokes equations are carried out for Reynolds numbers () from 0.1≤
TL;DR: In this paper, a floating production platform top-side systems and equipment development (TPSED) project was supported by the MOTIE (Ministry of Trade, Industry and Energy) of the Korean government.
Abstract: This research was supported by a "Floating Production Platform Topside Systems and Equipment Development" Grant from the MOTIE (Ministry of Trade, Industry and Energy) of the Korean government.
TL;DR: In this article, a model called "micropore lling phase permeation" (MFP) was proposed to simulate the movement of condensable vapor through a micropore.
Abstract: Molecular dynamics simulation was used to investigate the permeation properties of a virtual condensable vapor through micropores. A permeation model was proposed to simulate the movement of condensable vapor through a micropore. The model is called “micropore lling phase permeation (MFP),” and the e ect of feed gas pressure, pore size and pore size distributions on the vapor permeation properties was examined through model calculations. The observed permeance of ethane-like LJ particles at 260 K, a temperature below the critical temperature of real ethane, decreased stepwise at a speci c pressure as the mean pressure was increased for micropores sized 0.8 and 1.1 nm in diameter. Analysis of the adsorption isotherm in the pores and vapor permeation simulations revealed the formation of a high-density liquid-like phase in micropores as the MFP caused a decrease in the mobility of permeating molecules. The model calculations based on the MFP showed qualitative agreement with the simulation results.