Evaporation of methanol droplet on the Teflon surface under different air velocities

Evaporation of sessile droplets

“…In [28] this increase was related to a noticeable decrease of the droplet temperature and therefore to an increase of the surface tension. It was shown in [28] that the time of full evaporation of a droplet of the initial volume 7 μl is about two times smaller under ambient air velocity of 1.2 m/s than in quiescent air. In the case of partial wetting the spreading/evaporation of a liquid droplet placed on a solid support proceeds in general through four stages [30*] as shown in Fig.…”

“…The effect of forced convection on the kinetics of evaporation of a methanol droplet on a Teflon substrate has been studied in [28]. As it was stressed in [28] the intensive air motion can modify not only the mass transfer on liquid/air interface, but also the local temperature distribution on the surface, what results in the rather complicated time dependence of the droplet contact angle, including a stage when the contact angle increases.…”

“…As it was stressed in [28] the intensive air motion can modify not only the mass transfer on liquid/air interface, but also the local temperature distribution on the surface, what results in the rather complicated time dependence of the droplet contact angle, including a stage when the contact angle increases. In [28] this increase was related to a noticeable decrease of the droplet temperature and therefore to an increase of the surface tension. It was shown in [28] that the time of full evaporation of a droplet of the initial volume 7 μl is about two times smaller under ambient air velocity of 1.2 m/s than in quiescent air.…”

The Effect of the Substrate Temperature and the Height of the Mini-Channel on the Evaporation of Liquid Droplet Blown by the Gas Flow

“…In work [5] it is shown that Marangoni effect (flow driven by surface tension gradient) modifies the drop interface shape and impacts on evaporation. The influence of gas flow on droplet evaporation is known, but all these studies were conducted in the open air with insufficiently controlled conditions [6]. This paper presents the experimental results for evaporation of the droplet under gas action, placed on a heated substrate in a mini-channel.…”

The effect of temperature and gas Reynolds number on evaporation of a sessile liquid drop in mini-channel

“…Such experimental investigation requires development of new optical methods, one of them based on Micro-PIV. Gas action on evaporation of drop is also known and studied [7], but mostly all investigations have been carried out in open ambient air, where conditions are not very controlled. Dynamics of drop on surface by a shearing air in channel have been studied in [8], it is shown strong influence of contact angle hysteresis and drop sizes on the dynamics.…”