FINITE ELEMENTS SOLUTION FOR FLOW IN NONCIRCULAR CONDUITS
TYPICAL SOLUTIONS FOR CONDUITS OF VARIOUS SHAPES ARE PRESENTED. FOR TURBULENT FLOW THE SOLUTION IS BASED ON THE VALIDITY OF THE USE OF AN EDDY VISCOSITY CONCEPT TO ACCOUNT FOR THE REYNOLDS STRESSES. THE SOLUTION PROCEDURE ALLOWS THE QUANTITATIVE ISOLATION OF THE EFFECTS OF SECONDARY FLOWS ON THE VELOCITY AND BOUNDARY SHEAR DISTRIBUTIONS. HOWEVER, THE EFFECT OF SECONDARY FLOWS HAS BEEN CONSIDERED HEREIN ONLY FOR A SQUARE DUCT BECAUSE OF THE PRESENT DEARTH OF KNOWLEDGE ABOUT THEIR DISTRIBUTION IN OTHER CONDUIT SHAPES. FOR THE SQUARE DUCT THE SOLUTION SHOWS THAT THE SECONDARY FLOW IS RESPONSIBLE FOR A 6 PERCENT INCREASE IN THE FRICTION FACTOR AND AN 11 PERCENT DECREASE IN THE MAXIMUM BOUNDARY SHEAR. THE INCLUSION OF THE SECONDARY FLOWS IN THE ANALYSIS ALLOWS SATISFACTORY AGREEMENT TO BE ACHIEVED BETWEEN THE CALCULATED AND EXPERIMENTAL VELOCITY AND BOUNDARY SHEAR DISTRIBUTIONS AND ILLUSTRATES THE LIMITATIONS THAT MUST ACCOMPANY ANY SOLUTION THAT IGNORES THE EFFECTS OF SECONDARY FLOWS. /ASCE/
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Supplemental Notes:
- PROC PAPER 10425 2 APP
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Authors:
- Gerard, R
- Publication Date: 1974-3
Media Info
- Features: Figures; References;
- Pagination: p. 425-41
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Serial:
- Journal of the Hydraulics Division
- Volume: 100
- Issue Number: hy3
- Publisher: American Society of Civil Engineers
Subject/Index Terms
- TRT Terms: Boundary layer; Conduits; Flow; Fluid dynamics; Friction; Hydraulics; Shape; Shear properties; Turbulence; Velocity
- Candidate Terms: Turbulent flow
- Uncontrolled Terms: Boundary shear; Fluid flow
- Subject Areas: Highways; Hydraulics and Hydrology;
Filing Info
- Accession Number: 00204558
- Record Type: Publication
- Files: TRIS
- Created Date: Jul 16 1974 12:00AM