Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/73849
Title: Simulation of a polymer drop in a shear field with dissipative particle dynamics method
Authors: Chen, S.
Phan-Thien, N. 
Fan, X.J.
Khoo, B.C. 
Keywords: Dissipative Particle Dynamics
Droplets
Suspension
Issue Date: 2003
Source: Chen, S.,Phan-Thien, N.,Fan, X.J.,Khoo, B.C. (2003). Simulation of a polymer drop in a shear field with dissipative particle dynamics method. 2003 Nanotechnology Conference and Trade Show - Nanotech 2003 1 : 246-249. ScholarBank@NUS Repository.
Abstract: The dynamics of polymer drops in micro channel in steady-state and transient shear flow conditions are investigated using the Dissipative Particle Dynamics (DPD) method. The polymer drop is made up of 10% DPD solvent particles and 90% finite extensible non-linear elastic (FENE) bead spring chains. With FENE chains, shear thinning and normal stress difference effects are observed. For a polymer drop in steady-state shear field, the relationship between the deformation rate (D) and the Capillary number ( Ca ) could be divided into linear and nonlinear regimes. As the shear rate increases further, the drop begins to elongate; a sufficiently deformed drop will break up, and in the mean time, possible coalescence may occur for two neighboring drops. In a shear reversal, an elongated and oriented polymer drop retracts towards a roughly spherical shape. Due to the soft interaction of DPD particles, the tumbling phenomena of the polymer drop is not apparent even for large Ca.
Source Title: 2003 Nanotechnology Conference and Trade Show - Nanotech 2003
URI: http://scholarbank.nus.edu.sg/handle/10635/73849
ISBN: 0972842209
Appears in Collections:Staff Publications

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