Experimental investigation of heat transfer in a rivulet on the inclined foil


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Abstract

Heat transfer at rivulet water flow over the constantan foil with the length of 80 mm, width of 35 mm, and thickness of 25 mm was studied experimentally. The foil surface temperature was measured by an IR-scanner. Distributions of heat flux density on the surface of the foil, where the liquid flowed, were obtained. To determine the heat flux density from the foil to liquid near the contact line, the Cauchy problem was solved for the stationary heat equation using the thermographic data. Calculation results showed that the maximal heat flux occurs in the area of the contact line and exceeds the average heat flux from the entire foil surface by several times. This is explained by the influx of heat from the periphery of foil to the rivulet due to the relatively high value of heat conductivity coefficient of the foil material and high evaporation rate in the region of the contact line.

About the authors

V. V. Cheverda

Kutateladze Institute of Thermophysics SB RAS; Tomsk Polytechnic University

Author for correspondence.
Email: slava.cheverda@gmail.com
Russian Federation, Novosibirsk; Tomsk

I. V. Marchuk

Kutateladze Institute of Thermophysics SB RAS; Novosibirsk State University

Email: slava.cheverda@gmail.com
Russian Federation, Novosibirsk; Novosibirsk

A. L. Karchevsky

Novosibirsk State University; Sobolev Institute of Mathematics SB RAS

Email: slava.cheverda@gmail.com
Russian Federation, Novosibirsk; Novosibirsk

E. V. Orlik

Kutateladze Institute of Thermophysics SB RAS; Tomsk Polytechnic University

Email: slava.cheverda@gmail.com
Russian Federation, Novosibirsk; Tomsk

O. A. Kabov

Kutateladze Institute of Thermophysics SB RAS; Tomsk Polytechnic University

Email: slava.cheverda@gmail.com
Russian Federation, Novosibirsk; Tomsk

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