2014
DOI: 10.1007/s00348-014-1744-2
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UV-mediated coalescence and mixing of inkjet printed drops

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Cited by 7 publications
(4 citation statements)
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“…In addition to the slow viscous regime discussed so far, the bridge height was observed to grow with a universal exponent of 2/3 for contact angle below 90 and an exponent of 1/2 for the contact angle of 90 in the inertial regime. [20][21][22] In contrast to Newtonian droplets discussed above, the coalescence of rheologically complex fluids rather remains obscure despite its wide application in droplet 3D printing, 23,24 emulsions, [25][26][27] and microfluidics. 28 Varma et al 29 highlighted the importance of viscoelasticity viscoelasticty and relaxation time on coalescence of polymeric droplets in a pendant-sessile configuration.…”
Section: Introductionmentioning
confidence: 99%
“…In addition to the slow viscous regime discussed so far, the bridge height was observed to grow with a universal exponent of 2/3 for contact angle below 90 and an exponent of 1/2 for the contact angle of 90 in the inertial regime. [20][21][22] In contrast to Newtonian droplets discussed above, the coalescence of rheologically complex fluids rather remains obscure despite its wide application in droplet 3D printing, 23,24 emulsions, [25][26][27] and microfluidics. 28 Varma et al 29 highlighted the importance of viscoelasticity viscoelasticty and relaxation time on coalescence of polymeric droplets in a pendant-sessile configuration.…”
Section: Introductionmentioning
confidence: 99%
“…Coalescence of microscopic or macroscopic liquid drops has been one of the most widely researched multiphase problems owing to its significant role in a variety of phenomena like cloud formation and precipitation, oil spills, emulsions, additive manufacturing processes such as aerosol jet printing, inkjet printing, syringe/extrusion printing, electrohydrodynamic (EHD) jet printing, etc. The effects of viscosity, surface tension, and surface wettability on the coalescence dynamics of Newtonian droplets on both solid surfaces and liquid films have been well studied. Recently, a number of researchers have studied the coalescence dynamics of non-Newtonian polymeric droplets, including the effect of impact velocity.…”
Section: Introductionmentioning
confidence: 99%
“…Coalescence of liquid drops has been one of the most well-studied problems in the realm of capillary driven fluid flows. The fundamental fluid mechanics issues associated with such coalescence that have received significant attention include the identification of different flow regimes and their effects on coalescence as well as the identification of the effect of substrate wettability, axisymmetry, surrounding fluid, drop surface tension, , and drop viscosity on the coalescence. Such fundamental knowledge on coalescence has implications in a large number of natural and engineering phenomena such as the formation of rain drops and thunderstorms, droplet-based 3D printing (e.g., inkjet printing , and aerosol jet (AJ) printing), stability of foams and emulsions, desalting of crude oil, and many more. The drop coalescence occurring with the drops either freely suspended inside another fluid medium or in a partially (dynamic) wetting state in contact with a solid has been equally explored.…”
Section: Introductionmentioning
confidence: 99%
“…However, a large number of applications require probing the drop dynamics and coalescence for polymeric, non-Newtonian liquid drops. Some such examples include the possible in-flight coalescence of polymeric drops as they are transported in a background carrier gas flow inside the printer nozzle during AJ printing (i.e., when the coalescence occurs with the drops being suspended entirely in another background fluid), , coalescence of polymeric drops (with and without in-situ curing) that have impacted the printing substrate (with a finite velocity) during inkjet printing and AJ printing (i.e., the coalescence event occurs with the drops being in a dynamic wetting state on a solid substrate), the mechanisms dictating the dynamics of polymer blends, etc. Very recently, Varma et al presented one of the first studies on the coalescence of polymeric drops.…”
Section: Introductionmentioning
confidence: 99%