Abstract
Capsules are ubiquitous in medical and biological systems, and other bio-medical industries. Dynamics of capsules in various flow conditions have received significant attention recently. Various numerical, experimental, and analytical studies have given insight into the dependence of capsule dynamics on the membrane and fluid properties. However, impact of capsules on solid walls has been studied scantily in spite of its relevance in many physical and biological systems. We use numerical simulations to study the impact of a spherical capsule on a rigid surface at moderate Weber (We) and Reynolds (Re) numbers. Specifically, we investigate the effect of shear stiffness and area incompressibility of the membrane on the capsule deformation during impact with a rigid surface using the Neo-Hookean and Skalak constitutive models for the membrane. At low We, the maximum deformation of the capsule scales as We\(^{1/2}\). Whereas, at low Reynolds numbers and high Weber numbers, the maximum diameter to which the capsule can spread after impact, deviates from the We\(^{1/2}\) scaling, due to an increase in the viscous dissipation losses during capsule spreading. Interestingly, the scaling at low Re is given by Re\(^{1/5}\) which is also in agreement with that for a liquid droplet. We show that, for low area incompressiblity, Neo-Hookean and Skalak models show similar capsule dynamics. Whereas, for capsules with large area incompressibility and low shear stiffness in the Skalak model, the dynamics is similar to that of Neo-Hookean capsules with large shear stiffness.
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References
N.J. Zuidam, V. Nedovic, Encapsulation technologies for active food ingredients and food processing (2010)
G. Ma, Z.-G. Su, Microspheres and microcapsules in biotechnology: design, preparation and applications (2013)
S. Sarkar, Artificial blood. Indian J. Crit. Care Med. 12(3), 140 (2008)
T. Chang, Artificial cells and bioencapsulation in bioartificial organs. Ann. N. Y. Acad. Sci. 831, 249–259 (1997)
D. Barthes-Biesel, Motion and deformation of elastic capsules and vesicles in flow. Annu. Rev. Fluid Mech. 48, 25–52 (2016)
D. Barthes-Biesel, Motion of a spherical microcapsule freely suspended in a linear shear flow. J. Fluid Mech. 100(4), 831–853 (1980)
D. Barthes-Biesel, A. Diaz, E. Dhenin, Effect of constitutive laws for two-dimensional membranes on flow-induced capsule deformation. J. Fluid Mech. 460, 211–222 (2002)
P. Vlahovska, Y.-N. Young, G. Danker, C. Misbah, Dynamics of a non-spherical microcapsule with incompressible interface in shear flow. J. Fluid Mech. 678, 221–247 (2011)
E. Lac, D. Barthes-Biesel, N. Pelekasis, J. Tsamopoulos, Spherical capsules in three-dimensional unbounded stokes flows: effect of the membrane constitutive law and onset of buckling. J. Fluid Mech. 516, 303–334 (2004)
S. Ramanujan, C. Pozrikidis, Deformation of liquid capsules enclosed by elastic membranes in simple shear flow: large deformations and the effect of fluid viscosities. J. Fluid Mech. 361, 117–143 (1998)
S. Kessler, R. Finken, U. Seifert, Swinging and tumbling of elastic capsules in shear flow. J. Fluid Mech. 605, 207–226 (2008)
P. Bagchi, R.M. Kalluri, Dynamics of nonspherical capsules in shear flow. Phys. Rev. E 80(1), 016307 (2009)
E. Lac, D. Barthès-Biesel, Deformation of a capsule in simple shear flow: effect of membrane prestress. Phys. Fluids 17(7), 072105 (2005)
E. Jambon-Puillet, T.J. Jones, P.-T. Brun, Deformation and bursting of elastic capsules impacting a rigid wall. Nat. Phys. 16(5), 585–589 (2020)
D. Bartolo, C. Josserand, D. Bonn, Retraction dynamics of aqueous drops upon impact on non-wetting surfaces. J. Fluid Mech. 545, 329–338 (2005)
J. Eggers, M.A. Fontelos, C. Josserand, S. Zaleski, Drop dynamics after impact on a solid wall: theory and simulations. Phys. Fluids 22(6), 062101 (2010)
S. Mandre, M. Mani, M.P. Brenner, Precursors to splashing of liquid droplets on a solid surface. Phys. Rev. Lett. 102(13), 134502 (2009)
S. Wildeman, C.W. Visser, C. Sun, D. Lohse, On the spreading of impacting drops. J. Fluid Mech. 805, 636–655 (2016)
A.L. Yarin, Drop impact dynamics: splashing, spreading, receding, bouncing\(\ldots \). Annu. Rev. Fluid Mech. 38, 159–192 (2006)
C. Josserand, S.T. Thoroddsen, Drop impact on a solid surface. Annu. Rev. Fluid Mech. 48, 365–391 (2016)
J.M. Kolinski, S.M. Rubinstein, S. Mandre, M.P. Brenner, D.A. Weitz, L. Mahadevan, Skating on a film of air: drops impacting on a surface. Phys. Rev. Lett. 108(7), 074503 (2012)
S.K. Doddi, P. Bagchi, Lateral migration of a capsule in a plane Poiseuille flow in a channel. Int. J. Multiph. Flow 34(10), 966–986 (2008)
S.K. Doddi, P. Bagchi, Three-dimensional computational modeling of multiple deformable cells flowing in microvessels. Phys. Rev. E 79(4), 046318 (2009)
X. Li, K. Sarkar, Front tracking simulation of deformation and buckling instability of a liquid capsule enclosed by an elastic membrane. J. Comput. Phys. 227(10), 4998–5018 (2008)
S. Shrivastava, J. Tang, Large deformation finite element analysis of non-linear viscoelastic membranes with reference to thermoforming. J. Strain Anal. Eng. Design 28(1), 31–51 (1993)
R. Scardovelli, S. Zaleski, Direct numerical simulation of free-surface and interfacial flow. Annu. Rev. Fluid Mech. 31(1), 567–603 (1999)
The GTS Library. http://gts.sourceforge.net/
S. Popinet, A quadtree-adaptive multigrid solver for the Serre–Green–Naghdi equations. J. Comput. Phys. 302, 336–358 (2015)
L. Xu, W.W. Zhang, S.R. Nagel, Drop splashing on a dry smooth surface. Phys. Rev. Lett. 94(18), 184505 (2005)
S. Mandre, M.P. Brenner, The mechanism of a splash on a dry solid surface. J. Fluid Mech. 690, 148–172 (2012)
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The authors would like to acknowledge the Department of Science and Technology, India for the DST-NSM funding.
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Satheesh, K., Tomar, G. Impact of elastic capsules on a solid wall. Eur. Phys. J. Spec. Top. 232, 849–858 (2023). https://doi.org/10.1140/epjs/s11734-022-00660-0
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DOI: https://doi.org/10.1140/epjs/s11734-022-00660-0