Distributed parallel computation for complex rotational flows of non-Newtonian fluids

Complex rotational flows of non‐Newtonian fluids are simulated through finite element methods. The predictions have direct relevance to dough kneading, associated with the food industry. The context is taken as two‐dimensional and one of stirring material within a cylindrical vessel. Three stirrer s...

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Vydáno v:International journal for numerical methods in fluids Ročník 43; číslo 10-11; s. 1301 - 1328
Hlavní autoři: Baloch, A., Webster, M. F.
Médium: Journal Article Konferenční příspěvek
Jazyk:angličtina
Vydáno: Chichester, UK John Wiley & Sons, Ltd 10.12.2003
Wiley
Témata:
Computational methods in fluid dynamics
distributed computation
dough
Exact sciences and technology
finite element method
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Non-newtonian fluid flows
non-Newtonian fluids
Physics
rotating flow
viscoelastic
work done
Viscoelastic fluid
Finite element method
Shear viscosity
Streamlines
Computational fluid dynamics
Digital simulation
Parallel processing
Non-Newtonian fluids
Rotational flow
Elongational flow
Pseudoplastic fluid
Mesh generation
ISSN:0271-2091, 1097-0363
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Shrnutí:Complex rotational flows of non‐Newtonian fluids are simulated through finite element methods. The predictions have direct relevance to dough kneading, associated with the food industry. The context is taken as two‐dimensional and one of stirring material within a cylindrical vessel. Three stirrer shapes are considered, placed in eccentric location with respect to the cylinder centre. The motion is driven by the rotation of the outer vessel wall. Variation with change in rheology and change in stirrer shapes are analysed, with respect to flow kinematics, stress fields, rate‐of‐work and power consumed. Computations are performed for Newtonian, shear‐thinning and viscoelastic fluids, at various viscosity levels to gradually approximate more realistic dough‐like response. For viscoelastic fluids, Phan‐Thien/Tanner constitutive models are adopted. The numerical method employed is based on a finite element semi‐implicit time‐stepping Taylor–Galerkin/pressure‐correction scheme, posed in a cylindrical polar co‐ordinate system. Simulations are conducted via distributed parallel processing, performed on a networked cluster of workstations, employing message passing. Parallel performance timings are compared against those obtained working in sequential mode. Ideal linear speed‐up with the number of processors is observed for viscoelastic flows under this coarse‐grained implementation. Copyright © 2003 John Wiley & Sons, Ltd.
Bibliografie:istex:4F37C517BA955AD1D6F5A23BF350EAF689956E0E
UK EPSRC - No. L14916
ark:/67375/WNG-GXBDQW2S-G
ArticleID:FLD541
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0271-2091
1097-0363
DOI:10.1002/fld.541