Abstract
This study is related to the transport of inertial particles in a differentially heated cubic cavity. Three moderate values of the Rayleigh number Ra = 2×108, 4×108, 7×108 are considered. There is no back reaction from the particle on the flow, i.e., one-way coupling. Small (d = 15μm), intermediate (d = 35μm), and large (d = 75 μm) sizes of particles are used to study the particle behavior. The particles are influenced by two forces, the drag and gravity force. From our simulations, we observed that a large fraction of smallsized particles follow the flow motion and they are not significantly affected by gravity, remaining suspended in the flow. On the other hand, large-sized particles quickly settle down toward the bottom wall under gravity and are deposited at the bottom wall. Owing to this difference, particle distribution for small particles and large particles is quite different. Small particles tend to accumulate near a particular region near hot and cold walls, while the particle depletion region is observed in the core region in a particular pattern. Large particles are almost uniformly distributed. Detailed mechanisms are discussed using the flow field and particle response characteristics.
| Original language | English |
|---|---|
| Pages (from-to) | 3169-3182 |
| Number of pages | 14 |
| Journal | Journal of Mechanical Science and Technology |
| Volume | 32 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2018 Jul 1 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
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Behavior of settling inertial particles in a differentially heated cubic cavity at moderate Rayleigh number. / Gereltbyamba, Battsetseg; Lee, Chang Hoon.
In: Journal of Mechanical Science and Technology, Vol. 32, No. 7, 01.07.2018, p. 3169-3182.Research output: Contribution to journal › Article
TY - JOUR
T1 - Behavior of settling inertial particles in a differentially heated cubic cavity at moderate Rayleigh number
AU - Gereltbyamba, Battsetseg
AU - Lee, Chang Hoon
PY - 2018/7/1
Y1 - 2018/7/1
N2 - This study is related to the transport of inertial particles in a differentially heated cubic cavity. Three moderate values of the Rayleigh number Ra = 2×108, 4×108, 7×108 are considered. There is no back reaction from the particle on the flow, i.e., one-way coupling. Small (d = 15μm), intermediate (d = 35μm), and large (d = 75 μm) sizes of particles are used to study the particle behavior. The particles are influenced by two forces, the drag and gravity force. From our simulations, we observed that a large fraction of smallsized particles follow the flow motion and they are not significantly affected by gravity, remaining suspended in the flow. On the other hand, large-sized particles quickly settle down toward the bottom wall under gravity and are deposited at the bottom wall. Owing to this difference, particle distribution for small particles and large particles is quite different. Small particles tend to accumulate near a particular region near hot and cold walls, while the particle depletion region is observed in the core region in a particular pattern. Large particles are almost uniformly distributed. Detailed mechanisms are discussed using the flow field and particle response characteristics.
AB - This study is related to the transport of inertial particles in a differentially heated cubic cavity. Three moderate values of the Rayleigh number Ra = 2×108, 4×108, 7×108 are considered. There is no back reaction from the particle on the flow, i.e., one-way coupling. Small (d = 15μm), intermediate (d = 35μm), and large (d = 75 μm) sizes of particles are used to study the particle behavior. The particles are influenced by two forces, the drag and gravity force. From our simulations, we observed that a large fraction of smallsized particles follow the flow motion and they are not significantly affected by gravity, remaining suspended in the flow. On the other hand, large-sized particles quickly settle down toward the bottom wall under gravity and are deposited at the bottom wall. Owing to this difference, particle distribution for small particles and large particles is quite different. Small particles tend to accumulate near a particular region near hot and cold walls, while the particle depletion region is observed in the core region in a particular pattern. Large particles are almost uniformly distributed. Detailed mechanisms are discussed using the flow field and particle response characteristics.
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U2 - 10.1007/s12206-018-0620-z
DO - 10.1007/s12206-018-0620-z
M3 - Article
AN - SCOPUS:85050143429
VL - 32
SP - 3169
EP - 3182
JO - KSME Journal
JF - KSME Journal
SN - 1738-494X
IS - 7
ER -