The effect of gravity and shear stress on a liquid film driven in a horizontal minichannel at local heating

Yulia O. Kabova, V. V. Kuznetsov, O. A. Kabov

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The present study is focused on the investigation of gravity effect on thermocapillary deformations in a film flowing under action of co-current gas flow, which creates the tangential force on the gas-liquid interface. The influence of local heating intensity on the heater at a substrate is also investigated. Effects of surface tension, temperature dependent viscosity and thermocapillarity are taken into account. Investigations have shown that gravity has a significant effect on the film deformations and pattern. Decreasing of gravity level leads to a flow destabilization. 3D liquid film pattern noticeably changes in spanwise direction. Increasing of heat flux leads to increasing of liquid film deformations. Dependence of film thinning on heat flux is strongly nonlinear. The most dangerous deformations (regions of minimum film thickness with possible disruption of liquid) take place behind the downstream edge of the heater at any gravity conditions.

Original languageEnglish
JournalMicrogravity Science and Technology
Volume21
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 1 Aug 2009

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

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