Abstract
Rivulet flows are a special type of thin film flows with a bounded width. The use of rivulet flows is very perspective in various types of process equipment such as evaporators. The flow dynamics in rivulets has some peculiarities, the investigation of which allows understanding the gist of possible mechanism of enhancement of heat transfer. In the present work a mathematical model for the rivulet flow in conditions of a variable gravity has been elaborated. The liquid flow takes place in a slot between two plates and is caused by a co-current gas flow. The numerical calculations of the flow parameters depending from the gravity forces have been made. The analytical formula for connection of the main rivulet parameters (width, contact angle, liquid flow rate ...) in a linearized approach has been derived. The comparison of numerical results with experimental data obtained during 44 Parabolic Flights campaign of the European Space Agency has been carried out. Liquid film of FC-72 driven by the Nitrogen gas has been studied in experiments. Force balance is changed during a parabolic flight and due to surface tension effect the liquid film in a horizontal minichannel 40 mm width became a flattened rivulet 9 mm width at microgravity.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008 |
| Pages | 307-312 |
| Number of pages | 6 |
| Edition | PART A |
| DOIs | |
| Publication status | Published - 1 Dec 2008 |
| Event | 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008 - Darmstadt, Germany Duration: 23 Jun 2008 → 25 Jun 2008 |
Other
| Other | 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008 |
|---|---|
| Country | Germany |
| City | Darmstadt |
| Period | 23.6.08 → 25.6.08 |
Fingerprint
ASJC Scopus subject areas
- Process Chemistry and Technology
Cite this
Mathematical modeling of rivulet flow driven by variable gravity and gas flow in a minichannel. / Bartashevich, M. V.; Kuznetsov, V. V.; Kabov, O. A.
Proceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008. PART A. ed. 2008. p. 307-312.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Mathematical modeling of rivulet flow driven by variable gravity and gas flow in a minichannel
AU - Bartashevich, M. V.
AU - Kuznetsov, V. V.
AU - Kabov, O. A.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - Rivulet flows are a special type of thin film flows with a bounded width. The use of rivulet flows is very perspective in various types of process equipment such as evaporators. The flow dynamics in rivulets has some peculiarities, the investigation of which allows understanding the gist of possible mechanism of enhancement of heat transfer. In the present work a mathematical model for the rivulet flow in conditions of a variable gravity has been elaborated. The liquid flow takes place in a slot between two plates and is caused by a co-current gas flow. The numerical calculations of the flow parameters depending from the gravity forces have been made. The analytical formula for connection of the main rivulet parameters (width, contact angle, liquid flow rate ...) in a linearized approach has been derived. The comparison of numerical results with experimental data obtained during 44 Parabolic Flights campaign of the European Space Agency has been carried out. Liquid film of FC-72 driven by the Nitrogen gas has been studied in experiments. Force balance is changed during a parabolic flight and due to surface tension effect the liquid film in a horizontal minichannel 40 mm width became a flattened rivulet 9 mm width at microgravity.
AB - Rivulet flows are a special type of thin film flows with a bounded width. The use of rivulet flows is very perspective in various types of process equipment such as evaporators. The flow dynamics in rivulets has some peculiarities, the investigation of which allows understanding the gist of possible mechanism of enhancement of heat transfer. In the present work a mathematical model for the rivulet flow in conditions of a variable gravity has been elaborated. The liquid flow takes place in a slot between two plates and is caused by a co-current gas flow. The numerical calculations of the flow parameters depending from the gravity forces have been made. The analytical formula for connection of the main rivulet parameters (width, contact angle, liquid flow rate ...) in a linearized approach has been derived. The comparison of numerical results with experimental data obtained during 44 Parabolic Flights campaign of the European Space Agency has been carried out. Liquid film of FC-72 driven by the Nitrogen gas has been studied in experiments. Force balance is changed during a parabolic flight and due to surface tension effect the liquid film in a horizontal minichannel 40 mm width became a flattened rivulet 9 mm width at microgravity.
UR - http://www.scopus.com/inward/record.url?scp=77952644596&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952644596&partnerID=8YFLogxK
U2 - 10.1115/ICNMM2008-62135
DO - 10.1115/ICNMM2008-62135
M3 - Conference contribution
SN - 0791848345
SN - 9780791848340
SP - 307
EP - 312
BT - Proceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008
ER -