Abstract
The heat flux distribution near the contact lines of one or several (3) drops on a horizontal heated constantan foil is investigated. The temperature distribution of the bottom foil surface was measured by the FLIR infrared (IR) camera. To measure the heat flux distribution near the contact lines numerical solution of the Cauchy problem is used. The maximum of the heat flux density is observed near the contact line and it exceeds the average heat flux density by several times. This is due to relatively high heat conductivity coefficient of the foil material and high evaporation rate in the contact line region, so the heat flux from the foil periphery (out of the drop) is enter to the contact line region of the drop.
Highlights
Transfer in sessile drop on a thin metal foil is studied using thermochromic liquid crystals (TLCs) in [12]
It is shown that the local heat flux density in the contact line region was about 5 times higher than the average heat flux density
Heat transfer in a sessile liquid droplet was studied with numerical methods in [8]
Summary
Transfer in sessile drop on a thin metal foil is studied using thermochromic liquid crystals (TLCs) in [12]. The process in a sessile liquid drop on the heated substrates with different wettability are investigated numerically and experimentally in [4, 5]. The main role in the droplets evaporation is wetting of solid surface and processes in three-phase contact line gas-liquid-solid.
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