On the lifetimes of evaporating droplets
نویسندگان
چکیده
The complete description of the lifetime of a droplet on a solid substrate evaporating in a ‘stick–slide’ mode is obtained. The unexpectedly subtle relationship between the lifetime of such a droplet and the lifetimes of initially identical droplets evaporating in the extreme modes (namely the constant contact radius and constant contact angle modes) is described and summarised in an appropriate master diagram. In particular, it is shown that the lifetime of a droplet is not, in general, constrained by the lifetimes of the extreme modes.
منابع مشابه
Evaporation of droplets on strongly hydrophobic substrates.
The manner in which the extreme modes of droplet evaporation (namely, the constant contact radius and the constant contact angle modes) become indistinguishable on strongly hydrophobic substrates is described. Simple asymptotic expressions are obtained which provide good approximations to the evolutions of the contact radius, the contact angle, and the volume of droplets evaporating in the extr...
متن کاملEvaporation Characteristics of Diesel and Biodiesel Fuel Droplets on Hot Surfaces
In CI engines, the evaporation rate of fuel on various hot surfaces, including the combustion chamber, has a significant effect on deposit formation and accumulation, the exhaust emissions of PM and NOx, and their efficiency. Therefore, the evaporation of liquid fuel droplets impinging on hot surfaces has become an important subject of interest to engine designers, manufacturers, and researcher...
متن کاملThe onset of Marangoni convection for evaporating liquids by Brendan D. MacDonald A thesis submitted in conformity with the requirements for the degree of Doctor of Philosophy Graduate Department of Mechanical and Industrial Engineering
The onset of Marangoni convection for evaporating liquids Brendan D. MacDonald Doctor of Philosophy Graduate Department of Mechanical and Industrial Engineering University of Toronto 2012 The stability of evaporating liquids is examined. The geometries investigated are semiinfinite liquid sheets, bounded liquid sheets, sessile droplets, and funnels. Stability parameters are generated to charact...
متن کاملConvective rolls and hydrothermal waves in evaporating sessile drops.
Recent experiments on the evaporation of sessile droplets have revealed the spontaneous formation of various patterns including the presence of hydrothermal waves. These waves had previously been observed, in the absence of evaporation, in thin liquid layers subjected to an imposed, uniform temperature gradient. This is in contrast to the evaporating droplet case wherein these gradients arise n...
متن کاملEvaporating droplet hologram simulation for digital in-line holography setup with divergent beam.
Generalized Lorenz-Mie theory (GLMT) for a multilayered sphere is used to simulate holograms produced by evaporating spherical droplets with refractive index gradient in the surrounding air/vapor mixture. Simulated holograms provide a physical interpretation of experimental holograms produced by evaporating Diethyl Ether droplets with diameter in the order of 50 μm and recorded in a digital in-...
متن کامل