Abstract
This paper considers a flow of a liquid sheared by gas in a flat mini-channel with two identical heaters arranged in a row one after another in a streamwise direction at the bottom wall. The present study is focused on the investigation of influence of local heaters arrangement and size on thermocapillary deformations in a viscous film, gravity effect is also investigated. 3D one-sided model is considered, viscosity of the liquid is supposed to be temperature dependent. Numerical analysis reveals that interaction and mutual influence of 3D structures takes place. Film pattern changes qualitatively depending on the heaters arrangement and form. For rectangular heaters a middle stream exists. Minimum film thickness value increases and its location moves to heater edges for rectangular heaters. A critical backlash between two heaters, at which film thinning is the largest, exists. Gravity significantly affects on the film deformations. Decreasing of gravity level leads to a flow destabilization and film deformations, especially film thinning, essentially increases.
| Original language | English |
|---|---|
| Journal | Microgravity Science and Technology |
| Volume | 23 |
| Issue number | SUPPL. 1 |
| DOIs | |
| Publication status | Published - 1 Sep 2011 |
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Keywords
- Local heating
- Long-wave theory
- Microgravity
- Shear-driven liquid film
- Thermocapillarity
ASJC Scopus subject areas
- Modelling and Simulation
- Engineering(all)
- Physics and Astronomy(all)
- Applied Mathematics
Cite this
Shear-driven flow of locally heated viscous liquid film in a minichannel. / Kabova, Yulia O.; Kuznetsov, V. V.; Kabov, O. A.
In: Microgravity Science and Technology, Vol. 23, No. SUPPL. 1, 01.09.2011.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Shear-driven flow of locally heated viscous liquid film in a minichannel
AU - Kabova, Yulia O.
AU - Kuznetsov, V. V.
AU - Kabov, O. A.
PY - 2011/9/1
Y1 - 2011/9/1
N2 - This paper considers a flow of a liquid sheared by gas in a flat mini-channel with two identical heaters arranged in a row one after another in a streamwise direction at the bottom wall. The present study is focused on the investigation of influence of local heaters arrangement and size on thermocapillary deformations in a viscous film, gravity effect is also investigated. 3D one-sided model is considered, viscosity of the liquid is supposed to be temperature dependent. Numerical analysis reveals that interaction and mutual influence of 3D structures takes place. Film pattern changes qualitatively depending on the heaters arrangement and form. For rectangular heaters a middle stream exists. Minimum film thickness value increases and its location moves to heater edges for rectangular heaters. A critical backlash between two heaters, at which film thinning is the largest, exists. Gravity significantly affects on the film deformations. Decreasing of gravity level leads to a flow destabilization and film deformations, especially film thinning, essentially increases.
AB - This paper considers a flow of a liquid sheared by gas in a flat mini-channel with two identical heaters arranged in a row one after another in a streamwise direction at the bottom wall. The present study is focused on the investigation of influence of local heaters arrangement and size on thermocapillary deformations in a viscous film, gravity effect is also investigated. 3D one-sided model is considered, viscosity of the liquid is supposed to be temperature dependent. Numerical analysis reveals that interaction and mutual influence of 3D structures takes place. Film pattern changes qualitatively depending on the heaters arrangement and form. For rectangular heaters a middle stream exists. Minimum film thickness value increases and its location moves to heater edges for rectangular heaters. A critical backlash between two heaters, at which film thinning is the largest, exists. Gravity significantly affects on the film deformations. Decreasing of gravity level leads to a flow destabilization and film deformations, especially film thinning, essentially increases.
KW - Local heating
KW - Long-wave theory
KW - Microgravity
KW - Shear-driven liquid film
KW - Thermocapillarity
UR - http://www.scopus.com/inward/record.url?scp=80053582976&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053582976&partnerID=8YFLogxK
U2 - 10.1007/s12217-011-9277-2
DO - 10.1007/s12217-011-9277-2
M3 - Article
VL - 23
JO - Microgravity Science and Technology
JF - Microgravity Science and Technology
SN - 0938-0108
IS - SUPPL. 1
ER -