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Efficient Approximation of Unsteady Friction Weighting Functions
J. Hydraul. Eng. 130, 1097 (2004); doi:10.1061/(ASCE)0733-9429(2004)130:11(1097) (11 pages)
(Submitted 11 September 2003; accepted 10 February 2004)
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Add to FacebookA simple method is presented for evaluating wall shear stresses from known flow histories in unsteady pipe flows. The method builds on previous work by Trikha, but has two important differences. One of these enables the method to be used with much larger integration time steps than are acceptable with Trikha’s method. The other, a general procedure for determining approximations to weighting functions, enables it to be used at indefinitely small times (high frequencies). The method is applicable to both laminar and turbulent flows.
© 2004 ASCE
KEYWORDS
ASCE SUBJECT HEADINGS
Skin friction, Turbulent flow, Laminar flow, Pipe flow, Unsteady flow, Shear stressRELATED DATABASES
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