T. A. Yakhno, O. A. Sanina, M. G. Volovik, A. G. Sanin, V. G. Jahno, “Thermographic investigation of the temperature field dynamics at the liquid-air interface in drops of water solutions drying on a glass substrate”, Zhurnal Tekhnicheskoi Fiziki, 2012, Volume 82, Issue 7,Pages <nobr>22

This article is cited in 10 papers

Gases and Fluids

Thermographic investigation of the temperature field dynamics at the liquid-air interface in drops of water solutions drying on a glass substrate

T. A. Yakhno^a, O. A. Sanina^a, M. G. Volovik^b, A. G. Sanin^a, V. G. Jahno^a

^a Institute of Applied Physics, Russian Academy of Sciences, Nizhni Novgorod, 603950, Russia
^b Nizhni Novgorod Research Institute of Traumatology and Orthopedics, Ministry of Health and Social Development of the Russian Federation

Abstract: The temperature field distribution at the liquid-air interface in drops of water and water solutions drying on a glass substrate is studied with thermal imaging means. It is shown that irrespective of the liquid composition, the circumferential temperature of the drops (along the boundary line) is always higher than the temperature on the top. The temperature field on the surface of the drops is nonstationary and varies chaotically during water evaporation. It is found that the dynamics of histograms for albumin-containing and albumin-free liquids differ. Mechanisms behind the origination of thermocapillary liquid flows and their directivity in the drying drops are discussed.

Received: 24.05.2011