The Effects of Surfactants on the Drag of a Bubble

Ramírez-Muńoz, J.; Galicia-Nequiz, O.G.; Baz-Rodríguez, Sergio A.; Colín-Luna, J.A.; Martínez-Delgadillo, Sergio A.; Puebla, Héctor

doi:10.1016/j.proeng.2012.07.579

Cited by 5 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the presence of concentration gradients, molecular diffusion should be expected as the dominant mechanism in chemical flooding processes. The molecular diffusion is usually considered as a slow process in macroscopic scales because of the small magnitude of the diffusion coefficients (Masoudi et al 2019;Nagumo et al 2008;Ramírez-Muñoz et al 2012). According to the first Fick's first law, the time required for diffusion of species with diffusion coefficient D f into the distance d can be calculated by d 2 ∕D f (Paul et al 2014).…”

Section: Mass Diffusionmentioning

confidence: 99%

Impact of solutal Marangoni convection on oil recovery during chemical flooding

et al. 2020

View full text Add to dashboard Cite

In this study, the impacts of solutal Marangoni phenomenon on multiphase flow in static and micromodel geometries have experimentally been studied and the interactions between oil droplet and two different alkaline solutions (i.e. MgSO 4 and Na 2 CO 3) were investigated. The static tests revealed that the Marangoni convection exists in the presence of the alkaline and oil which should carefully be considered in porous media. In the micromodel experiments, observations showed that in the MgSO 4 flooding, the fluids stayed almost stationary, while in the Na 2 CO 3 flooding, a spontaneous movement was detected. The changes in the distribution of fluids showed that the circular movement of fluids due to the Marangoni effects can be effective in draining of the unswept regions. The dimensional analysis for possible mechanisms showed that the viscous, gravity and diffusion forces were negligible and the other mechanisms such as capillary and Marangoni effects should be considered in the investigated experiments. The value of the new defined Marangoni/capillary dimensionless number for the Na 2 CO 3 solution was orders of magnitude larger than the MgSO 4 flooding scenario which explains the differences between the two cases and also between different micromodel regions. In conclusion, the Marangoni convection is activated by creating an ultra-low IFT condition in multiphase flow problems that can be profoundly effective in increasing the phase mixing and microscopic efficiency.

show abstract

Section: Mass Diffusionmentioning

confidence: 99%

Impact of solutal Marangoni convection on oil recovery during chemical flooding

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The effect of surfactant on the motion dynamics of a single bubble is mainly considered in the scientific literature. In particular, it is known that addition of surfactant in a liquid leads to decrease of the rising velocity of a single gas bubble and, consequently, increase of the drag coefficient [1][2][3][4][5][6]. In the absence of surfactant the drag coefficient of a single bubble is determined by the Hadamard-Rybchinskii formula [7] 0 16 , Re…”

Section: Introductionmentioning

confidence: 99%

Experimental study of effect of the surfactant type on dynamics of monodispersed bubble cluster rising in a viscous liquid

Arkhipov,

Usanina,

Churkin

2023

E3S Web Conf.

View full text Add to dashboard Cite

The results of an experimental study of the process of contact ascent of the air monodispersed bubble cluster in the presence of surfactant in the range of Reynolds numbers Re < 0.2 are presented. New experimental data on the general picture of the contact ascent of the monodispersed bubble cluster in the presence of surfactant have been obtained. The effect of the nature of the surfactant on the overall picture of ascent, velocity and drag coefficient of the monodispersed bubble cluster has been analyzed.

show abstract

“…The distribution of the surfactants is determined by the adsorption/desorption kinetics, bulk diffusion, and surface convection. , If the rates of surfactant transport to the interface and surface diffusion are slow relative to the surface convection rate, the fluid motion sweeps the surfactants toward the trailing edge and forms a nonuniform distribution of the surfactants at the interface known as the stagnant cap . The resulting nonuniform surfactant distribution creates a surface tension gradient that counteracts the viscous stress of the flow and reduces the mobility and deformability of the interface. ,− …”

Section: Introductionmentioning

confidence: 99%

Interfacial Behavior of Particle-Laden Bubbles under Asymmetric Shear Flow

et al. 2021

View full text Add to dashboard Cite

The behavior of moving bubbles has mostly been studied in an axisymmetric flow field. To extend the knowledge to practical conditions, we investigate the interfacial and hydrodynamic properties of bubbles under asymmetric shear forces. Experiments are performed with a buoyant bubble at the tip of a capillary placed in a defined shear flow in the presence of surfactants, nanoparticles, and glass beads. The response of the interface to the surrounding asymmetric flow is measured under successive reduction of the surface area. Profile analysis tensiometry is utilized to investigate the dynamic surface tension and the surface rheology of the surfactant- and nanoparticle-laden interfaces. Microscopic particle image and tracking velocimetry are used to study the bulk flow and the interfacial mobility of the buoyant bubble. According to our results, the rotational component of the shear flow provokes an interfacial flow, which redistributes the adsorbed surfactants and particles at the interface. In the presence of NPSCs, a contiguous network of particles forms at the interface through densification of surface structures. We show that this interconnected nanoparticle network eventually stops the interfacial flow and decreases the mobility of the glass beads at the interface. The immobilization of the interface is characterized by a dimensionless number, defined as the ratio of the interfacial elasticity to bulk shear forces. This number provides an estimate of the interfacial forces required to impose interfacial immobility at a defined flow field. Our findings can serve as a basis to formulate boundary conditions for refined modeling and to predict the hydrodynamics of bubbles and droplets.

show abstract

The Effects of Surfactants on the Drag of a Bubble

Cited by 5 publications

References 10 publications

Impact of solutal Marangoni convection on oil recovery during chemical flooding

Impact of solutal Marangoni convection on oil recovery during chemical flooding

Experimental study of effect of the surfactant type on dynamics of monodispersed bubble cluster rising in a viscous liquid

Interfacial Behavior of Particle-Laden Bubbles under Asymmetric Shear Flow

Contact Info

Product

Resources

About