## 2 Experimental Setup and Procedure
The maximum measurement error of the initial static contact angle of the sessile drop did not exceed 3-5%. To measure the temperature field on the surface of the sessile droplet, a thermal imager with multiple image magnification was applied. The interfacial temperature of drop 2 was determined with the help of thermal imager NEC R500 EX-Pro (NEC Avio Infrared Technologies, Yokohama, Japan) (spectral range of 8-14 \(\upmu\)m, frame frequency of 30 frame/s, measurement accuracy of \(\pm\)1 \({}^{\circ}\)C, and thermogram resolution of \(640\times 480\)). The spectral bandwidth of infrared camera in short wave range (SW) was 3-5 \(\upmu\)m.  
The substrate with drop 2 was located on the surface of the heating plate (the plate was heated by electric current and tungsten wire). The wall temperature \(T_{w}\) was adjusted automatically with an accuracy of \(\pm\)1 \({}^{\circ}\)C. To measure the temperature \(T_{w}\), a low-inertia platinum-rhodium thermocouple with inertia of 0.1 s (the junction diameter of 0.05 mm) was used. The relative error of \(T_{w}\) temperature measurement did not exceed \(\pm\)0.5 \({}^{\circ}\)C. This measurement error was within the adjustment accuracy \(T_{w}\) (\(\pm\)1 \({}^{\circ}\)C). The thermocouple was fixed on the substrate surface by means of thermal paste with high thermal conductivity. The thermocouple practically did not overhang the wall surface and did not distort the velocity field in drop 2. In different experiments, the drop 2 consisted only of the distillate, and the composition of the droplet 1 changed: (1) 100% water; (2) water + surfactant \"AF 9-12\" (NEONOL AF 9-12 oxyethylated monoalkyl phenol) with mass concentration of 4%; (3) water + surfactant \"OP-10\" (auxiliary material OP-10 product of treatment of a mixture of mono-and dialkylphenols with ethylene oxide) with mass concentration of 1%; (4) water + surfactant \"Sodium DS\" (sodium dodecyl sulfate) (0.1% mass). For all aqueous solutions, surfactant concentrations exceeded the critical concentration at which micelles are formed. These concentrations were taken to avoid a study on the effects of concentrations in this article due to the large amount of experimental data. The effect of concentrations will be presented in the next work. For measuring the velocity field in a horizontal section of the droplet, the Particle Image Velocimetry method was used. All measurements using PIV were carried out only in the horizontal section of the sessile drop (Figure 1). The horizontal measurement section of drop 2 was at a distance of 0.15-0.2 mm from the substrate surface. To measure the instantaneous velocity fields, a double solid-state Nd:YAG laser Quantel EverGreen 70 was used, which had the following main parameters: wavelength--532 nm, repetition frequency--4 Hz, and pulse energy--70 mJ. For the formation of the laser sheet, cylindrical lenses with an opening angle of 22\({}^{\circ}\) were used. For the purposes of the laser sheet positioning, an optical mirror was used. Registering images of drops required the camera ImperX IGV-B2020M with basic settings: image resolution--2048 \(\times\) 2048 pix, frequency of shooting--4 fps, and bit width--8 bit. Nikon macro lens (200 mm f/4 AF-D Macro) was also used. To process experimental data on the velocity field inside drop 2, the software Actual Flow with software packages PIV was used. The plane of the laser sheet was parallel to the wall and was at a height of 0.15-0.2 mm from the wall surface. Since the contact angle of the drop was close to the right angle, the value of the angle \(\alpha\) corresponded to 85-87\({}^{\circ}\). As a result, the error of the drop's curvature practically did not influence the results of measuring the instantaneous velocity field. The maximum error in measuring the average velocity of the liquid in a given horizontal section of the drop, taking into account the above-mentioned measurement features, did not exceed 15-20%.