THE EFFECT OF TORSION ON THE BIFURCATION STRUCTURE OF LAMINAR-FLOW INA HELICAL SQUARE DUCT

Authors
BOLINDER CJ
Citation
Cj. Bolinder, THE EFFECT OF TORSION ON THE BIFURCATION STRUCTURE OF LAMINAR-FLOW INA HELICAL SQUARE DUCT, Journal of fluids engineering, 117(2), 1995, pp. 242-248
Citations number
33
Categorie Soggetti
Engineering, Mechanical
Journal title
Journal of fluids engineering → ACNP
ISSN journal
00982202
Volume
117
Issue
2
Year of publication
1995
Pages
242 - 248
Database
ISI
SICI code
0098-2202(1995)117:2<242:TEOTOT>2.0.ZU;2-M
Abstract
The laminar fully developed flow problem in a helical square duct with a finite pitch is solved numerically using the finite-volume method w ith the SIMPLEC algorithm. h(2)-extrapolation is used to locate the li mit points of the stable solution branches. Results for the friction f actor are presented. For helical ducts of small pitch, or torsion, it is verified that all investigated flow properties are very similar to those for a toroidal duct with the same dimensionless curvature. A new correlation is proposed for the friction factor ratio.