Law of the wall for two-phase turbulent boundary layers

Citation
A. Troshko et Ya. Hassan, Law of the wall for two-phase turbulent boundary layers, INT J HEAT, 44(4), 2001, pp. 871-875
Citations number
15
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
ISSN journal
00179310 → ACNP
Volume
44
Issue
4
Year of publication
2001
Pages
871 - 875
Database
ISI
SICI code
0017-9310(200102)44:4<871:LOTWFT>2.0.ZU;2-#
Abstract
A two-phase logarithmic law of the wall for isothermal bubbly turbulent bou ndary layer is developed. Total boundary layer liquid turbulent stress is e stimated by the sum of bubble induced local stress and sheer induced stress . Boussinesq turbulent viscosity approximation is assumed to be valid for b oth stress components. A proportionality coefficient was introduced to acco unt for inherently non-linear interaction between shear and bubble induced turbulence fields. The two-phase wall law was implemented in CFX4.2 computa tional fluid dynamics program. A better agreement with experimental data wa s achieved when the new wall law was employed rather than conventional sing le-phase law. (C) 2001 Elsevier Science Ltd. All rights reserved.