Effect of temperature gradient within a solid particle on the rotation and oscillation modes in solid-dispersed two-phase flows

Takeuchi, Shintaro; Tsutsumi, Takaaki; Kajishima, Takeo

International Journal of Heat and Fluid Flow, 2013, 43, 15-25

Number of Access:882（2025-09-30 11:13 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/57200

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Title
Effect of temperature gradient within a solid particle on the rotation and oscillation modes in solid-dispersed two-phase flows
Creator
NRID
1000050372628 1000050372628
ORCID
0000-0003-0091-4542 0000-0003-0091-4542
researchmap permalink
50372628 50372628
Scopus Author ID
35474283000 35474283000
CreatorName
Takeuchi, Shintaro
CreatorName
Tsutsumi, Takaaki
NRID
1000030185772 1000030185772
CreatorName
Kajishima, Takeo
Subject
Multiphase flow
Solid-dispersion
Immersed solid object
Thermal flow
Heat conductivity
Description
Shintaro Takeuchi, Takaaki Tsutsumi and Takeo Kajishima, "Effect of temperature gradient within a solid particle on the rotation and oscillation modes in solid-dispersed two-phase flows," International Journal of Heat and Fluid Flow, Vol.43, pp.15-25, 2013.
動画は論文出版後に追加したものである。 / The video was added after the paper was published.
Abstract
Liquid-solid two-phase flow with heat transfer is simulated, and the effect of temperature gradient within a solid particle on the particle behaviour and heat transfer is studied. The interaction between fluid and particles is considered with our original immersed solid approach on a rectangular grid system. The local heat flux at the fluid-solid interface is described with an anisotropic heat conductivity matrix, and the governing equation of temperature is time-updated with an implicit treatment for the diffusion term. The method is applied to a 2-D natural convection flow of a relatively low Rayleigh number including multiple particles. Heat transfer and particle behaviours are studied for different solid heat conductivities (ratio to the fluid conductivity ranging between 10^−3 and 10^3) and solid volume fractions. Under a condition of relatively low heat conductivity ratio, the particles show a simple circulating flow. By increasing the heat conductivity ratio, a transition of the particulate flow is observed to oscillation mode around the domain centre due to the buoyancy force as a restitution force. The oscillation period is found to vary with the heat conductivity ratio, and it is related to the time scales for the heat transfer via fluid and solid.
Publisher
Elsevier
Source Title
International Journal of Heat and Fluid Flow
Volume (Issue)
43
Page
15-25
Date of Issued
2013-10
Language
English
Handle URL
https://hdl.handle.net/11094/57200
PISSN
0142727X
NCID
AA11531183
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/j.ijheatfluidflow.2013.05.013
Access Rights
open access
CopyRight
© 2013 Elsevier Inc. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. https://creativecommons.org/licenses/by-nc-nd/4.0/
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article