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SUMMARY:Complex Fluids at Interfaces: Structure\, Stability\, and Molecula
 r Effects
DTSTART;VALUE=DATE:20260617
DTSTAMP:20260428T194245Z
UID:e42803d531e552fdf8acc074bab6a07f12d03afe011cb03eabdef703
CATEGORIES:Conferences - Seminars
DESCRIPTION:You can apply to participate and find all the relevant informa
 tion (speakers\, abstracts\, program\,...) on the event website: https://
 www.cecam.org/workshop-details/complex-fluids-at-interfaces-structure-stab
 ility-and-molecular-effects-1492.\n\nRegistration is required to attend th
 e full event\, take part in the social activities and present a poster at 
 the poster session (if any).  However\, the EPFL community is welcome 
 to attend specific lectures without registration if the topic is of inte
 rest to their research. Do not hesitate to contact the CECAM Event Manage
 r if you have any question.\n\nDescription\n\nComplex fluids are ubiquito
 us in biology\, geophysics\, and industry [1]. These materials are challen
 ging to characterize and predict [1–4]\, particularly when they incorpor
 ate multiple interfaces\, as in colloidal suspensions [4]\, foams [5–7]\
 , or nanoporous membranes [8–10]. Many of these interfaces are micro- or
  nano-scale and evolve over short times\, which can obscure them to observ
 ation and pose challenges to experimentalists [2–5\, 11\, 12]. This open
 s exciting opportunities for a strong partnership between the development 
 of novel theoretical\, computational\, and experimental techniques.\nProbi
 ng interfaces presents unique challenges compared to probing complex fluid
 s in the bulk. The interfacial structure and constitutive behavior then de
 pend on the composition of two fluids as well as the interfacial configura
 tion [13\, 14]. Translating this increased complexity to a computational f
 ramework involves developing reliable models describing molecular interact
 ions near fluid-fluid or fluid-solid interfaces [15–17]\, as well as mod
 els for continuum stresses [18]. Molecular modeling is necessary to reveal
  the physics of chemically-complex structures [17]\, but is computationall
 y expensive\, and it can be challenging to identify the relevant physics t
 o include [19]. Yet the interface also provides unique opportunities for c
 ontrol: in liquid crystals\, for example\, interfacial stresses can be tra
 nsmitted through the bulk\, leading to novel pattern formation [20] and op
 tical materials exploiting interfacial control [21]. Finally\, interfaces 
 are prone to instabilities\, which can make flows unpredictable\, but open
 s opportunities to exploit unstable growth for spontaneous patterning.\nTo
  underscore the present challenges\, even for a “simple” Newtonian flu
 id\, the presence of an interface may hinder understanding of flow mechani
 cs. For example\, mechanisms for contact during drop impact are still deba
 ted [22]: molecular dynamics (MD) simulations can clarify which effects do
 minate among interfacial instabilities\, electrostatic charge\, gas-kineti
 c effects\, and other driving forces [22–26]\, in addition to liquid/sur
 face chemistry [27\, 28]. Diffusive processes at interfaces [29] and nanos
 cale membrane flows\, where osmotic and phoretic effects are significant [
 11\, 30]\, also require further development in MD or coarse-grained models
 .\n \nThis workshop aims to foster exchanges around the following broad 
 questions:\n\n	How do molecular phenomena determine the structural prop
 erties and interfacial dynamics of complex fluid interfaces?\n	How do we
  approach a rigorous\, robust\, and predictive upscaling between non-con
 tinuum computational approaches (e.g. MD\, coarse-grained models)\, which
  are computationally costly\, and large-scale systems? Can we extract univ
 ersal quantities or concepts from MD to be used in a continuum model? Are 
 these potential quantities intrinsic properties or do they depend on the f
 low configuration and hence require an ad hoc calibration for each flow si
 tuation?\n	How can emerging experimental and computational techniques info
 rm our understanding of interfacial instabilities in complex fluids? Can
  we account for instabilities arising from molecular and meso-scales in a 
 macroscopic stability analysis?\n	Is it possible to incorporate microscop
 ic effects into macroscopic models which 'go beyond' the conventional Na
 vier-Stokes-Fourier paradigm? For example\, can effective viscosities adeq
 uately account for molecular effects\, or can noise terms incorporate ther
 mal fluctuations? Can these models be captured by extending existing compu
 tational approaches\, or do they require entirely new frameworks?\n\nThe l
 ist of confirmed speakers will be announced in February. In addition\, a 
 limited number of abstracts may be submitted for the poster session – su
 bmissions will open in February.\n\nReferences\n\n[1] L. Veldscholte\, J. 
 Snoeijer\, W. den Otter\, S. de Beer\, Langmuir\, 40\, 4401-4409 (2024)\n
 [2] G. Zampogna\, P. Ledda\, K. Wittkowski\, F. Gallaire\, J. Fluid Mech.\
 , 970\, A39 (2023)\n[3] A. Carbonaro\, G. Savorana\, L. Cipelletti\, R. G
 ovindarajan\, D. Truzzolillo\, Phys. Rev. Lett.\, 134\, 054001 (2025)\n[4
 ] L. Buonaiuto\, S. Reuvekamp\, B. Shakhayeva\, E. Liu\, F. Neuhaus\, B. B
 raunschweig\, S. de Beer\, F. Mugele\, Advanced Materials\, 37\, (2025)\n
 [5] J. Sun\, L. Li\, R. Zhang\, H. Jing\, R. Hao\, Z. Li\, Q. Xiao\, L. Zh
 ang\, J. Phys. Chem. B\, 128\, 7871-7881 (2024)\n[6] H. Liu\, J. Zhang\, 
 Physics of Fluids\, 36\, (2024)\n[7] S. Perumanath\, M. Chubynsky\, R. Pi
 llai\, M. Borg\, J. Sprittles\, Phys. Rev. Lett.\, 131\, 164001 (2023)\n[
 8] F. Yu\, A. Ratschow\, R. Tao\, X. Li\, Y. Jin\, J. Wang\, Z. Wang\, Phy
 s. Rev. Lett.\, 134\, 134001 (2025)\n[9] R. Kaviani\, J. Kolinski\, Phys.
  Rev. Fluids\, 8\, 103602 (2023)\n[10] J. Sprittles\, Annu. Rev. Fluid Me
 ch.\, 56\, 91-118 (2024)\n[11] L. Ma\, C. Li\, J. Pan\, Y. Ji\, C. Jiang\
 , R. Zheng\, Z. Wang\, Y. Wang\, B. Li\, Y. Lu\, Light. Sci. Appl.\, 11\,
  270 (2022)\n[12] Q. Zhang\, W. Wang\, S. Zhou\, R. Zhang\, I. Bischofberg
 er\, Nat. Commun.\, 15\, 7 (2024)\n[13] R. Ishraaq\, S. Das\, Chem. Commu
 n.\, 60\, 6093-6129 (2024)\n[14] S. Popinet\, Annu. Rev. Fluid Mech.\, 5
 0\, 49-75 (2018)\n[15] L. Smook\, R. Ishraaq\, T. Akash\, S. de Beer\, S. 
 Das\, Phys. Chem. Chem. Phys.\, 26\, 25557-25566 (2024)\n[16] R. Ewoldt\,
  C. Saengow\, Annu. Rev. Fluid Mech.\, 54\, 413-441 (2022)\n[17] H. Liang
 \, Z. Cao\, Z. Wang\, A. Dobrynin\, ACS Macro Lett.\, 7\, 116-121 (2018)\
 n[18] Q. Xu\, K. Jensen\, R. Boltyanskiy\, R. Sarfati\, R. Style\, E. Dufr
 esne\, Nat. Commun.\, 8\, 555 (2017)\n[19] A. Fukushima\, S. Oyagi\, T. T
 okumasu\, Phys. Rev. E\, 111\, 055103 (2025)\n[20] K. Jorissen\, L. Velds
 cholte\, M. Odijk\, S. de Beer\, Meas. Sci. Technol.\, 35\, 115501 (2024)
 \n[21] A. Allemand\, M. Zhao\, O. Vincent\, R. Fulcrand\, L. Joly\, C. Ybe
 rt\, A. Biance\, Proc. Natl. Acad. Sci. U.S.A.\, 120\, (2023)\n[22] N. Ka
 vokine\, R. Netz\, L. Bocquet\, Annu. Rev. Fluid Mech.\, 53\, 377-410 (20
 21)\n[23] L. Bocquet\, Nat. Mater.\, 19\, 254-256 (2020)\n[24] R. Tunugun
 tla\, R. Henley\, Y. Yao\, T. Pham\, M. Wanunu\, A. Noy\, Science\, 357\,
  792-796 (2017)\n[25] P. Beltramo\, M. Gupta\, A. Alicke\, I. Liascukiene\
 , D. Gunes\, C. Baroud\, J. Vermant\, Proc. Natl. Acad. Sci. U.S.A.\, 114
 \, 10373-10378 (2017)\n[26] C. Guidolin\, E. Rio\, R. Cerbino\, F. Giavazz
 i\, A. Salonen\, Phys. Rev. Lett.\, 133\, 088202 (2024)\n[27] A. Bussonni
 ère\, I. Cantat\, J. Fluid Mech.\, 922\, A25 (2021)\n[28] L. Oyarte Gál
 vez\, S. de Beer\, D. van der Meer\, A. Pons\, Phys. Rev. E\, 95\, 030602
  (2017)\n[29] V. Calabrese\, A. Shen\, S. Haward\, Macromolecules\, 57\, 
 9668-9676 (2024)\n[30] M. Kumar\, J. Guasto\, A. Ardekani\, Proc. Natl. Ac
 ad. Sci. U.S.A.\, 120\, (2023)\n 
LOCATION:BCH 2103 https://plan.epfl.ch/?room==BCH%202103
STATUS:CONFIRMED
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