Quantitative experimental determination of evaporation influencing factors in single droplet levitation

Junk, Malte; Hinrichs, Jörn; Polt, Fritz; Fechner, Jonas; Pauer, Werner

doi:10.1016/j.ijheatmasstransfer.2019.119057

Cited by 21 publications

(11 citation statements)

References 46 publications

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“…35 The comparison of the flow velocity vectors in the surrounding of droplets at different aspect ratios revealed that the gas velocity and the mean incident flow velocity in front of the droplet surface increased with a higher aspect ratio. 36 In our experiment, with the droplet evaporating, the aspect ratio of the oblate droplet was increasing and this indicated that the flow field effect around the droplet was enhanced. In this case, the synthesized ZIF-8 of smaller particle Paper PCCP size also verified the effect of ultrasound in acoustically levitated droplets.…”

Section: Paper Pccpmentioning

confidence: 53%

“…Y. Sasaki, M. Junk et al measured the flow field around the acoustically levitated water droplets by particle tracking velocimetry (PTV) and particle image velocimetry (PIV). 35,36 The inner acoustic streaming was located at the surface boundary, while the outer acoustic streaming was represented by the toroidal vortices. The droplet external flow field direction was toward the droplet, with a circulating vortex forming near the droplet surface.…”

Section: Paper Pccpmentioning

confidence: 99%

See 1 more Smart Citation

Evaporation kinetics during containerless chemical synthesis of ZIF-8 in levitated droplets

Zheng

Zhuang

Ruan

et al. 2023

Phys. Chem. Chem. Phys.

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Section: Paper Pccpmentioning

confidence: 53%

Section: Paper Pccpmentioning

confidence: 99%

Evaporation kinetics during containerless chemical synthesis of ZIF-8 in levitated droplets

Zheng

Zhuang

Ruan

et al. 2023

Phys. Chem. Chem. Phys.

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“…Here, ω is the angular frequency of the sound vibration, D g i is the mass diffusion coefficient of the component i in the gas phase, and B i = A 0e,i /ρ 0 c 0 is an acoustic velocity scale of component i, where A 0e,i , ρ 0 , c 0 are the effective pressure amplitude of the acoustic field, unperturbed gas density and the sound velocity. The effective pressure amplitude A 0e,i will significantly affect the evaporation rate of the droplet according to Junk et al (2020), which can also be derived from (3.9). We have maintained a stable value of A 0e in our experiments, which can be obtained via (5.6) in Yarin et al (1998) through obtaining the critical levitator power for dropout: A 0e,w = 5521 N m −2 for water, and A 0e,e = 5850 N m −2 for ethanol.…”

Section: Heat and Mass Transfer Equationsmentioning

confidence: 99%

Evaporation of acoustically levitated bicomponent droplets: mass and heat transfer characteristics

Wakata,

Chao,

Sun

et al. 2024

J. Fluid Mech.

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Evaporation of multicomponent droplets is important, albeit complex, in a wide range of applications, and requires a careful investigation. We investigate experimentally and numerically the evaporation characteristics of spherical, ethanol–water droplets with different initial concentration ratios in the acoustic levitation field. Imaging techniques and infrared thermometry are used for acquiring volume and surface temperature variations of droplets, reflecting their mass and heat transfer characteristics. Numerical simulations are conducted using modified parameters based on a theoretical model to consider the effect of the acoustic field. The calculation results show good agreement with the experimental data. The concentration and temperature distribution within the droplet is further investigated based on the numerical results.

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“…Junk et al [53] studied experimentally the evaporation of single droplet levitation. They studied different parameters such as droplet deformation, temperature, and surrounding flow field.…”

Section: Levitated Dropletmentioning

confidence: 99%

State of the Art of Fuel Droplet Evaporation

Giyad¹,

Shahad²

2022

IJHT

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The process of fuel droplet evaporating is one of the most important factors that directly affect the efficiency of the combustion process. Therefore, the current study reviews previous studies that focused on the process of evaporation of a drop of fuel. The review is divided into points. The first part is concerned with modeling of the evaporation process under different initial condition and temperature of the droplet. The second part present the experimental studies concerned with measuring the evaporation time of the droplet, as well as the shape of the droplet during the evaporation process. Most of the studies related to this subject can be divided into three categories: The first category is the studies that are concerned with the process of heating the droplet and studying the evaporation time for different types of fuels or by adding nanomaterials to the fuel and studying their effect on the evaporation process. The second category is the studies concerned with the mechanics of droplet evaporation and the study of droplet shape. The third category is the studies that focus on studying the effect of initial conditions, such as temperature and pressure, as well as the concentration of gasses surrounding the drop and their types. There are other studies concerned with projecting the electric field onto the drop during the evaporation process and studying its effect.

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Quantitative experimental determination of evaporation influencing factors in single droplet levitation

Cited by 21 publications

References 46 publications

Evaporation kinetics during containerless chemical synthesis of ZIF-8 in levitated droplets

Evaporation kinetics during containerless chemical synthesis of ZIF-8 in levitated droplets

Evaporation of acoustically levitated bicomponent droplets: mass and heat transfer characteristics

State of the Art of Fuel Droplet Evaporation

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