Introductory FLUENT Notes Fluent User Services cente ANSYS LUENT v6. 3 December 2006 wwfluentusers. com FLUENT Law of the Wall and Near -Wall treatments Dimensionless velocity data from a wide variety of turbulent duct and boundary-layer flows are shown here Wall shea Ur=251m(Ury/v)+545 p y where y is the normal distance from the wall For equilibrium turbulent all- adjacent cells in the log-la fully turbulent region Upper lim buffer layer region have known velocity log-law region Reynolds no nd wall shear stress data viscous sublayer C 2006 ANSYS. nc All ANSYS, Inc. Proprietar© 2006 ANSYS, Inc. All rights reserved. 6-15 ANSYS, Inc. Proprietary Fluent User Services Center www.fluentusers.com Introductory FLUENT Notes FLUENT v6.3 December 2006 Law of the Wall and Near-Wall Treatments ◆ Dimensionless velocity data from a wide variety of turbulent duct and boundary-layer flows are shown here: where y is the normal distance from the wall ◆ For equilibrium turbulent boundary layers, wall￾adjacent cells in the log-law region have known velocity and wall shear stress data Wall shear  stress   = w U  = + U y y  + = U u u