Hydrodynamic interactions between two side-by-side Janus spheres

Dhiman, Manish; Gupta, Raghvendra; Reddy, K. Anki

doi:10.1016/j.euromechflu.2021.01.006

Cited by 4 publications

(2 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In engineering applications, especially in ocean engineering fields, drag reduction is a crucial topic, which is an effective method for the purpose of achieving various goals such as low energy consumption, long range voyage, and so on. Recently, drag reduction technology have made some significant progress, including drag-reducing additives [1,2], surface treatment [3][4][5], and air-injection [6,7]. Among these methods, superhydrophobic surfaces have attracted great attention due to its potential for significant drag reduction, simple fabrication (spraying), low cost and strong antifouling ability [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Zeinali [28] investigated the effect of imposing the locally partial-slip on the surface of the backward-facing step and the sphere. Dhiman [4] investigated a three-dimensional flow around two Janus spheres held fixed relative to each other with the line connecting their centres normal to a uniform fluid stream, at Reynolds numbers ranging from 0.1 to 50.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on the drag reduction mechanism of spheres with various hydrophobic types

Liu¹,

Yu²,

Kong³

et al. 2022

Comptes Rendus. Mécanique

View full text Add to dashboard Cite

In this paper, a 3D hydrophobic model was developed using User-Defined Functions to investigate the flow characteristics and drag reduction mechanism of spheres with various hydrophobic types. The results confirmed that for the fully hydrophobic spheres, the separation point was continuously shifted back and the separation angle was reduced from 57.6°to 29.5°when the dimensionless slip length was increased from 0.02 to 0.1. The length of the recirculation zone was reduced from 1.90D to 0.93D, which was 51% shorter. And the decreasing fluctuation energy made the vortex structure transformed from hairpin-shaped vortices to vortex-ring. In addition, the drag reduction of partial-hydrophobic spheres was closely related to the number and location of the sudden change interfaces.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the drag reduction mechanism of spheres with various hydrophobic types

Liu¹,

Yu²,

Kong³

et al. 2022

Comptes Rendus. Mécanique

View full text Add to dashboard Cite

show abstract

An overview on collision dynamics of deformable particles

et al. 2022

View full text Add to dashboard Cite

Study on the motion characteristics of Janus based on the squirmer model in the flow

Chen,

Lin,

2024

Physics of Fluids

View full text Add to dashboard Cite

The motion characteristics of Janus in the flow are studied numerically using the lattice Boltzmann method based on the squirmer model. The effects of velocity ratio J on the right and left hemisphere surface of Janus, particle Reynolds number Rep, flow Reynolds number Rec, initial orientation angle φ0 on Janus trajectory, and lateral equilibrium position yeq/H are analyzed. The results showed that, for the motion of Janus in stationary power-law fluids in a channel, Janus moves randomly in a small space in shear-thickening fluids when Rep is low and exhibits three motion modes at Rep = 5. The larger the J value, the easier it is for Janus to reach yeq/H. The higher the Rep, the closer the yeq/H is to the lower wall. In shear-thinning fluids, the motion of Janus exhibits significant randomness at Rep = 0.5 and 1, reaches the same yeq/H at Rep = 2 and 3, and tends toward yeq/H near the centerline and along the upper wall, respectively, at Rep = 4 and 5. For the motion of Janus particles in a channel flow of power-law fluids, in shear-thinning fluids, no matter what value J is, Janus reaches yeq/H on the centerline. The lower the Rep, the closer the yeq/H is to the wall. Two particles move toward yeq/H when Rep ≥ 1. The higher the Rep, the closer the yeq/H is to the centerline. The two particles will exhibit the upstream mode at Rep = 2. Two particles eventually reach yeq/H at different Rec. When φ0 > 0°, the two particles first eventually tend toward yeq/H = 0.2 and 0.8. When the value of φ0 is negative, the larger the absolute value of φ0 and higher the Rep, the more likely particles are to exhibit upstream mode.

show abstract

Hydrodynamic interactions between two side-by-side Janus spheres

Cited by 4 publications

References 53 publications

Study on the drag reduction mechanism of spheres with various hydrophobic types

Study on the drag reduction mechanism of spheres with various hydrophobic types

An overview on collision dynamics of deformable particles

Study on the motion characteristics of Janus based on the squirmer model in the flow

Contact Info

Product

Resources

About