Transitional regimes of rivulet gravity flow on the bottom side of an inclined plate

Ruslan A. Dekhtyar, Vladimir E. Nakoryakov, Valeriy V. Ovchinnikov, Ekaterina Yu Slesareva

Research output: Contribution to journalArticlepeer-review

Abstract

The relevance of the discussed issue is caused by the need to use liquid films in heat exchangers (steam generators of coal-fired power station, compressors of drilling device, absorbers, distillation columns, heat pumps etc.). Along with searches and development of traditional sources (gas, oil) the promising trend is the use of energy stored in the reservoirs, ground, geothermal sources, industrial emissions (air, water, drains, etc.) and its transformation to heat by means of thermal pumps. Now thermal pumps are energetically effective heating equipment. The main aim of the research is to substantiate the selection of design models and programs for distributing devices of supplying absorbent solution based on the experimental data on rivulet flow on a hydrophobic surface at various orientation of a plate normal in relation to a gravity vector; to define the conditions under which the rivulet form and liquid stream direction change; to test the distributing devices, which are capable of stabilizing flow for non-stationary meandering rivulet. The methods used in the study. The visualization of flow regimes by a high-speed video for rivulet on an inclined surface is used. Using the methods of digital processing of video frame, the parameters (size, velocity, acceleration) of various flow patterns for form deviation along rivulet are defined. The results. The authors have obtained the experimental data of the rivulet flow regime on the bottom side of the inclined plate and determined the conditions for meandering rivulet. The data obtained allow testing the computing programs on adequacy of calculation results. The method of liquid flow stabilization at meandering rivulet is tested using the dripping device.

Original languageEnglish
Pages (from-to)102-109
Number of pages8
JournalBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Volume326
Issue number8
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • Drops
  • Flow patterns
  • Hydrophobic surface
  • Meandering
  • Rivulet

ASJC Scopus subject areas

  • Economic Geology
  • Geotechnical Engineering and Engineering Geology
  • Fuel Technology
  • Management, Monitoring, Policy and Law
  • Waste Management and Disposal
  • Materials Science (miscellaneous)

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