001009599 001__ 1009599
001009599 005__ 20230927205047.0
001009599 037__ $$aFZJ-2023-02914
001009599 041__ $$aEnglish
001009599 1001_ $$0P:(DE-Juel1)130616$$aDhont, Jan K.G.$$b0$$eCorresponding author
001009599 1112_ $$aInvited Seminar$$cPuebla$$d2023-03-28 - 2023-03-29$$wMexico
001009599 245__ $$aA Shear-Induced Instability in Glass Forming Colloids&Motility-Induced Inter-Particle Correlations and Dynamics$$f2023-03-27 - 
001009599 260__ $$c2023
001009599 3367_ $$033$$2EndNote$$aConference Paper
001009599 3367_ $$2DataCite$$aOther
001009599 3367_ $$2BibTeX$$aINPROCEEDINGS
001009599 3367_ $$2ORCID$$aLECTURE_SPEECH
001009599 3367_ $$0PUB:(DE-HGF)31$$2PUB:(DE-HGF)$$aTalk (non-conference)$$btalk$$mtalk$$s1695788855_3955$$xInvited
001009599 3367_ $$2DINI$$aOther
001009599 520__ $$aAfter a short introduction to colloids, in this presentation I will discuss two different phenomena: (i) In the first part, a shear-induced instability is discussed that leads to stable shear-banded flow profiles, as experimentally observed in glass forming colloids. Shear-gradient induced colloidal mass transport from regions of high shear rate towards regions of low shear rate is essential for the occurrence of the instability. After an intuitive picture for the origin of this instability, an expression for the migration velocity of colloids due to spatial gradients in the shear rate is derived. The resulting coupled equations of motion for the colloid concentration and the Navier-Stokes equation are solved analytically [1], which reproduces the shear-banded velocity profiles that are observed experimentally [2]. 	(ii) Amongst the various theoretical appoaches towards dynamics and phase behaviour of suspensions of active Brownian particles (ABPs), no attempt has been made to specify motility-induced inter-particle correlations. In the second part, a derivation of explicit expressions for the pair-correlation function for ABPs for small and large swimming velocities and low concentrations is discussed. This allows to derive a generalization of Fick’s law for the colloid concentration that includes self-propulsion. It will be shown that there is a concentration-gradient induced preferred swimming direction, due to inter-particle correlations, which tends to stabilize the system against spinodal phase separation [3]. [1] H. Jin, K. Kang, K.-H. Ahn, J.K.G. Dhont, Soft Matter 10 (2014) 9470[2] R. Besseling, L. Isa, P. Ballesta, G. Petekidis, M.E. Cates, W C.K. Poon, Phys. Rev. Lett.  105 (2010) 268301[3] J.K.G. Dhont, G.W. Park, W.J. Briels, Soft Matter 17 (2021) 5613
001009599 536__ $$0G:(DE-HGF)POF4-5243$$a5243 - Information Processing in Distributed Systems (POF4-524)$$cPOF4-524$$fPOF IV$$x0
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001009599 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130616$$aForschungszentrum Jülich$$b0$$kFZJ
001009599 9131_ $$0G:(DE-HGF)POF4-524$$1G:(DE-HGF)POF4-520$$2G:(DE-HGF)POF4-500$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-5243$$aDE-HGF$$bKey Technologies$$lNatural, Artificial and Cognitive Information Processing$$vMolecular and Cellular Information Processing$$x0
001009599 9141_ $$y2023
001009599 920__ $$lyes
001009599 9201_ $$0I:(DE-Juel1)IBI-4-20200312$$kIBI-4$$lBiomakromolekulare Systeme und Prozesse$$x0
001009599 980__ $$atalk
001009599 980__ $$aVDB
001009599 980__ $$aI:(DE-Juel1)IBI-4-20200312
001009599 980__ $$aUNRESTRICTED