Drag Reduction by Polymer Addition

reportActive / Technical Report | Accession Number: AD0763824 | Open PDF

Abstract:

Special attention is paid to the changes in turbulence structure brought about by polymer additives, and an effort is made to understand these in the light of recent advances in the study of shear flow turbulence in ordinary fluids. Also a simplified theoretical model of shear flow wall turbulence is presented, with the aid of which an exploratory study of the influence of some non-Newtonian fluid properties is carried out. A particularly intriguing feature is the remarkable effectiveness of extremely high-molecular-weight polymers by which only a few parts per million of weight of solvent are sufficient in some cases to lead to drag reductions of 50 per cent or more.

Author(s):
Landahl, Marten T.
Author Organization(s):
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF AERONAUTICS AND ASTRONAUTICS
Supplementary Note:
Prepared in cooperation with The Royal Inst. of Tech., Stockholm (Sweden). Presented at the International Congress of Theoretical and Applied Mechanics (13th) Held in Moscow (USSR) 1972, p1-59.
Pagination:
0063

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFOSR-TR-73-1200
Contract/Grant Number(s):
F44620-71-C-0007
Task Number(s):
978102
Project Number(s):
AF-9781
Monitor Series:
TR-73-1200, AFOSR
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation; JCA_5.3_Planning; JCA_5_Command and Control; JCA_1.2.3_Educating; JCA_1.2.6_Concepts; JCA_1.2.5_Lessons Learned
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*DRAG, *POLYMERS, ADDITIVES, FLOW FIELDS, FLUID DYNAMICS, HYDRODYNAMICS, LIQUIDS, MATHEMATICAL MODELS, REDUCTION, SHEAR STRESSES, TRANSFORMATIONS, TURBULENCE, WALLS
Field(s)/Group(s):
Fluid Mechanics
Keyword(s):
SHEAR FLOW, DRAG REDUCTION, *DRAG REDUCING FLUIDS
Report Date:
1971 Jan 01