PMID- 34378623
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210902
IS  - 1744-6848 (Electronic)
IS  - 1744-683X (Linking)
VI  - 17
IP  - 34
DP  - 2021 Sep 14
TI  - Hydrodynamics of immiscible binary fluids with viscosity contrast: a 
      multiparticle collision dynamics approach.
PG  - 7978-7990
LID - 10.1039/d1sm00541c [doi]
AB  - We present a multiparticle collision dynamics (MPC) implementation of layered 
      immiscible fluids A and B of different shear viscosities separated by planar 
      interfaces. The simulated flow profile for imposed steady shear motion and the 
      time-dependent shear stress functions are in excellent agreement with our 
      continuum hydrodynamics results for the composite fluid. The wave-vector 
      dependent transverse velocity auto-correlation functions (TVAF) in the bulk-fluid 
      regions of the layers decay exponentially, and agree with those of single-phase 
      isotropic MPC fluids. In addition, we determine the hydrodynamic mobilities of an 
      embedded colloidal sphere moving steadily parallel or transverse to a fluid-fluid 
      interface, as functions of the distance from the interface. The obtained 
      mobilities are in good agreement with hydrodynamic force multipoles calculations, 
      for a no-slip sphere moving under creeping flow conditions near a clean, ideally 
      flat interface. The proposed MPC fluid-layer model can be straightforwardly 
      implemented, and it is computationally very efficient. Yet, owing to the spatial 
      discretization inherent to the MPC method, the model can not reproduce all 
      hydrodynamic features of an ideally flat interface between immiscible fluids.
FAU - Tan, Zihan
AU  - Tan Z
AD  - Biomacromolecular Systems and Processes, Institute of Biological Information 
      Processing, Forschungszentrum Julich, 52428 Julich, Germany. z.tan@fz-juelich.de.
FAU - Calandrini, Vania
AU  - Calandrini V
FAU - Dhont, Jan K G
AU  - Dhont JKG
FAU - Nagele, Gerhard
AU  - Nagele G
FAU - Winkler, Roland G
AU  - Winkler RG
LA  - eng
PT  - Journal Article
DEP - 20210811
PL  - England
TA  - Soft Matter
JT  - Soft matter
JID - 101295070
SB  - IM
EDAT- 2021/08/12 06:00
MHDA- 2021/08/12 06:01
CRDT- 2021/08/11 09:04
PHST- 2021/08/12 06:00 [pubmed]
PHST- 2021/08/12 06:01 [medline]
PHST- 2021/08/11 09:04 [entrez]
AID - 10.1039/d1sm00541c [doi]
PST - ppublish
SO  - Soft Matter. 2021 Sep 14;17(34):7978-7990. doi: 10.1039/d1sm00541c. Epub 2021 Aug 
      11.