Abstract: he research on micro°uidic droplet size prediction has been extensive and fruitful, while the droplet deforming process has been seldom studied. In this paper, a frying-oil-assessing micro°uidic device was designed to study the droplet deforming and recovering processes, which were dominated by channel geometry, °ow rates, sheath °ow viscosity and interfacial tension of the two phases. Theoretical expressions of the deforming process and its extreme value were obtained for the ˉrst time, supported by simulation and experiments. Theoretical, simulation and experimental results indicated that the steady-state droplet length could be a useful parameter for frying oil assessment.

Key words: microfluidic device| frying oil| droplet deformation process| total polar materials (TPM)

摘要： he research on micro°uidic droplet size prediction has been extensive and fruitful, while the droplet deforming process has been seldom studied. In this paper, a frying-oil-assessing micro°uidic device was designed to study the droplet deforming and recovering processes, which were dominated by channel geometry, °ow rates, sheath °ow viscosity and interfacial tension of the two phases. Theoretical expressions of the deforming process and its extreme value were obtained for the ˉrst time, supported by simulation and experiments. Theoretical, simulation and experimental results indicated that the steady-state droplet length could be a useful parameter for frying oil assessment.

关键词: microfluidic device| frying oil| droplet deformation process| total polar materials (TPM)