The presence of organic surfactants in atmospheric aerosol may lead to a depression of cloud droplet growth and evaporation rates affecting the radiative properties and lifetime of clouds. Both the magnitude and mechanism of this effect, however, remain poorly constrained. We have used Raman thermometry measurements of freely evaporating micro-droplets to determine evaporation coefficients for ...

The suspended droplet framework is commonly used to study liquid fuel evaporation and combustion. However, measurements at this facility can be affected by artifacts. This examines their impact on butanol evaporation. Thermal radiation fiber conduction effects are specifically addressed. Results show that heat through the significantly affect evaporation, even causing internal bubbling in some ...

A liquid droplet in contact with a solid surface was simulated by the molecular dynamics method, in order to study the microscopic aspects of the liquid-solid contact phenomena and phase change heat transfer. Measured ‘contact angle’ was well correlated by the depth of the integrated potential of the surface. The layered liquid structure near the surface was also explained with the integrated p...

A device has been invented for protein crystallization by sandwiching the liquid droplet between two surfaces, in which both hydrophilic and hydrophobic surfaces can be used as crystallization substrates. Comparing with the traditional hanging drop method, it can also reduce the evaporation rate of the liquid droplet and provide a stable environment for the crystal growth. In this work, crystal...

This communication reports strongly anisotropic wetting behavior on one-dimensional nanopatterned surfaces. Contact angles, degree of anisotropy, and droplet distortion are measured on micro- and nanopatterned surfaces fabricated with interference lithography. Both the degree of anisotropy and the droplet distortion are extremely high as compared with previous reports because of the well-define...

We experimentally investigate the Leidenfrost effect at pressures ranging from 1 to 0.05 atmospheric pressure. As a direct consequence of the Clausius–Clapeyron phase diagram of water, the droplet temperature can be at ambient temperature in a non-sophisticated lab environment. Furthermore, the lifetime of the Leidenfrost droplet is significantly increased in this low pressure environment. The ...

In a recent experiment by Manoharan et al. [1], a small number N of spherical particles (diameter of about one micron) located at the surface of an oil droplet self-assemble due to the evaporation of the droplet. Such process leads to final packings of spheres which are unique and, for N ≤ 11, equivalent to the minimal second moment clusters as studied by Sloane et al. [2]. Because such simple ...

This paper describes a multifunctional semi-closed droplet-array chip coupled with electrospray ionization mass spectrometry (ESI-MS) detection for multiple sample pretreatment and analysis. A novel interfacing method for coupling droplet system with ESI-MS was proposed using a sampling probe-two-dimensional (2D) droplet-array strategy. The 2D droplet-array system was composed of an 8 × 8 micro...

A unified theory for aerodynamic and condensation shock waves in vapor-droplet flows in the presence of an inert carrier gas is presented. Same conservation equations apply across discontinuous models for both types of wave. Exact (as well as approximate), explicit analytical jump conditions across such discontinuities are derived subject to several boundary conditions. Collectively they may be...