Thermal-induced crossover: Darcy-to-power law response in flow of polymer chains

Grace M Foo and R.b Pandey

Physica A: Statistical Mechanics and its Applications, 1999, vol. 265, issue 3, 416-423

Abstract: Flow of polymer chains is studied as a function of temperature (T), field (E), and chain length (Lc) by a hybrid computer simulation. In low field, the polymer flow rate density (j) shows a linear response, i.e., Darcy law, j=φE at high temperatures and a power-law response j=φEδ at low temperatures. The power-law response exponent, δ is nonuniversal and depends on temperature (δ≃1.0–2.0). The chain permeability φ=A(Lc)T0.21±0.01 in the low temperature regime; the prefactor A(Lc) decays with the chain length according to A∼Lc−0.18.

Keywords: Polymer chains; Darcy law; Thermal-induced crossover; Flow response (search for similar items in EconPapers)
Date: 1999
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:265:y:1999:i:3:p:416-423

DOI: 10.1016/S0378-4371(98)00645-1

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