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Title of Journal: Rheol Acta

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Abbravation: Rheologica Acta

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Springer Berlin Heidelberg

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DOI

10.1007/978-3-531-90808-3_13

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ISSN

1435-1528

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A computational extensional rheology study of two

Authors: Jose Esteban LópezAguilar Michael F Webster Alaa Hasan A AlMuslimawi Hamid Reza TamaddonJahromi Rhodri Williams Karl Hawkins Colin Askill Chin Lye Ch’ng Gwyneth Davies Phillip Ebden Keir Lewis
Publish Date: 2014/12/19
Volume: 54, Issue: 4, Pages: 287-305
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Abstract

The main focus of the present computational modelling work is to determine the extensional rheological response of some model biofluids with a view to ultimately aiding experimentally based analyses and clinical practice This is accomplished in the present study through model extensional flows and rheological investigation addressing filament stretching and contraction flows and upon which significant advances are presented As such two biofluid flow systems within the human body are of current interest i respiratory disorders and sputum in the lung airways associated with filament stretching where stretchiness of mucus sputum in situ is vital with clinical focus on chronic obstructive pulmonary disease COPD/sputum and ii bile flow in the biliary system contraction flow with clinical focus on disorders of primary sclerosis cholangitis and common bile duct narrowing Both sputum and bile biofluid systems are represented through kinetic theory rheological fluid modelling with capability to represent material structure entanglement branching and anisotropy This is practically achieved by appealing to the class of pompom differential constitutive models extracted from polymer melt physics and deployed here through a single extended pompom SXPP approximation This class of models is sufficiently rich to enable description of both network structure and rheological properties exhibiting viscoelastic response memory with strainhardening/softening and shearthinning propertiesFinancial support scholarship to JELA from Consejo Nacional de Ciencia y Tecnología CONACYT México Zienkiewcz College of Engineering scholarship and NHSWales Abertawe Bro Morgannwg Trust fund is gratefully acknowledged We are grateful to Dr H Matallah for his contribution in the initial coding and scoping work on the pompom stepstrain problem


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  1. Effect of morphology on the interfacial slip of immiscible polypropylene/polystyrene blends
  2. Amorphous and crystalline states of ultrasoft colloids: a molecular dynamics study
  3. A hierarchical multi-mode MSF model for long-chain branched polymer melts part II: multiaxial extensional flows
  4. Novel bitumen/isocyanate-based reactive polymer formulations for the paving industry
  5. Can dynamical mechanical measurements predict brittle fracture behaviour?
  6. Self-reinforcement of polymers as a consequence of elongational flow
  7. The role of convective constraint release in parallel superposition flows of nearly monodisperse entangled polymer solutions
  8. Influence of the initial cooling temperature on the gelation and yield stress of waxy crude oils
  9. Molecular architecture and linear viscoelasticity of homogeneous ethylene/styrene copolymers
  10. Flow analysis of the weld line formation during injection mold filling of thermoplastics
  11. Squeeze flow of soft solids between rough surfaces
  12. Molecular orientation in non-Newtonian flow of dilute polymer solutions around spheres
  13. The contribution of frictional contacts to the shear strength of coarse glass bead powders and slurries
  14. End effects in rotational viscometry II. Pseudoplastic fluids at elevated Reynolds number
  15. Rheological behaviour of a high-melt-strength polypropylene at elevated pressure and gas loading for foaming purposes
  16. The effect of premature wall yield on creep testing of strongly flocculated suspensions
  17. Rheological and morphological properties of PA6/ECO nanocomposites
  18. Orientation distribution in injection molding: a further step toward more accurate simulations
  19. Fractal analysis of viscoelastic data with automated gel point location and its potential application in the investigation of therapeutically modified blood coagulation
  20. Modeling confinement in polymer nanocomposites from linear viscoelasticity data
  21. Linear viscoelasticity of styrenic block copolymers–clay nanocomposites
  22. On exact solutions of the flow equations for Bingham visco-plastic fluids through an eccentric annular cross-section
  23. Power-law creep and residual stresses in a carbopol gel
  24. Electrorheological response of SnO 2 and Y 2 O 3 nanoparticles in silicon oil
  25. Generation of inkjet droplet of non-Newtonian fluid
  26. Scaling and mesostructure of Carbopol dispersions
  27. Study of the non-isothermal glass fibre drawing process
  28. Influence of molecular parameters on the stress dependence of viscous and elastic properties of polypropylene melts in shear
  29. An error-minimizing approach to inverse Langevin approximations

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