Number of the records: 1
Viscometric Flow under Apparent Wall Slip in Parallel-Plate Geometry
- 1.
SYSNO ASEP 0028301 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Viscometric Flow under Apparent Wall Slip in Parallel-Plate Geometry Title Viskometrický tok v geometrii paralelních disků pod vlivem zdánlivého skluzu při stěnách Author(s) Wein, Ondřej (UCHP-M) RID, SAI Source Title Journal of Non-Newtonian Fluid Mechanics. - : Elsevier - ISSN 0377-0257
Roč. 126, 2-3 (2005), s. 105-114Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords apparent wall slip ; viscometry ; parallel-plate viscometer Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA104/01/0545 GA ČR - Czech Science Foundation (CSF) GA104/04/0826 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40720504 - UCHP-M (2005-2011) Annotation The slip boundary condition in current use assumes the viscometric shear surfaces at wall are locally coplanar with the wall surfaces, which is a correct assumption for Couette and Poiseuille flow but leads to contradictions for other viscometric configurations. This issue can be resolved by admitting a non-zero wall shear angle in the slip boundary condition. Numeri-cal simulations of the rotational flow in parallel-plate geometry with the modified slip bound-ary condition predict the both experimentally available quantities (torque, normal thrust) for a given set of relevant material functions (fluidity, slip extrapolation length, first and second normal-stress differences). Differences between the simulation results and the completed nar-row-gap approximation with the zero wall shear angles were however found negligibly small. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2006
Number of the records: 1