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An Analytical Study Of The Effect Of Surface Roughness On The Stability Of A Heated Water Boundary Layer
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Book Synopsis An Analytical Study of the Effect of Surface Roughness on the Stability of a Heated Water Boundary Layer by : Michael A. Kosecoff
Download or read book An Analytical Study of the Effect of Surface Roughness on the Stability of a Heated Water Boundary Layer written by Michael A. Kosecoff and published by . This book was released on 1976 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The onset of transition from laminar to turbulent flow in a high Reynolds number, water boundary layer was investigated with emphasis on predicting the global effects of distributed surface roughness on transition. The authors used the results of linear stability theory as an indicator of transition, but, this paper presents only comparisons of the stability results (not actual transition predictions). The effects of surface roughness on transition were induced by means of an existing phenomenological model for the effects of distributed roughness on the mean flow profiles. This model, originally developed for high Mach number, compressible boundary layers, was applied without change to the present incompressible, water boundary-layer environment, and identical values of the required empirical constants were used in both cases. One conclusion obtained from the numerical results is that the presence of favorable pressure gradients and/or surface heating make the boundary layer more susceptible to roughness, not only when compared in terms of the actual roughness height, but also when compared in terms of the roughness height to momentum thickness ratio. When the roughness is sufficiently large, its presence can change the effect of surface heat addition from a strongly stabilizing factor to a strongly destabilizing phenomena.
Book Synopsis An Analytical Study of the Effect of Surface Roughness on Boundary-Layer Stability by : Charles L. Merkle
Download or read book An Analytical Study of the Effect of Surface Roughness on Boundary-Layer Stability written by Charles L. Merkle and published by . This book was released on 1977 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of surface roughness on the transition of a laminar boundary layer are basically two-fold: (1) it can distort the mean velocity and temperature profiles thus altering the stability characteristics of the layer and (2) it can induce additional disturbances to the boundary layer which may lead to an earlier transition. Only the first of these effects is considered in this report. Three different types of surface roughness are investigated here; distributed roughness, surface waviness, and a single two-dimensional bump. An analytical model which describes the effect of distributed roughness on the mean flow and its stability is described. This model is further validated by comparison with Achenbach's experimental results and is then applied to the flow about an underwater body in order to illustrate the effects of surface roughness in a more realistic situation. Surface irregularities can play a dominant role in determining the practical limit for the application of boundary-layer control techniques. The present distributed roughness model as incorporated into the TAPS code can provide a reasonable prediction of its effect in the presence of boundary-layer control techniques (shaping, heating, suction) on the transition location for an underwater vehicle.
Download or read book NASA Technical Paper written by and published by . This book was released on 1980 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study of the Effects of Heating and Surface Roughness on Laminar Boundary Layer Stability in Water by : Htun Win
Download or read book Experimental Study of the Effects of Heating and Surface Roughness on Laminar Boundary Layer Stability in Water written by Htun Win and published by . This book was released on 1986 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
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Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1964 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Control by : Mohamed Gad-el-Hak
Download or read book Flow Control written by Mohamed Gad-el-Hak and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: No be certain it can is not based mathematics. knowledge if upon da Vinci, (Leonardo 1452 1519) the humankind. Thinking is one greatest of Joys of Galilei, (Galileo 1564 1642) Now I think is to be the root all hydrodynamics and is at of physical science, second the to none in its mathematics. present beauty of Thomson (William (Lord Kelvin), 1824 1907) The book contains the lecture notes of of the nine instructors at present eight the short Flow Control: Fundamentals and which held course was Practices, in the week 24 28 June and Carg6se, Corsica, France, during 1996, repeated at the of Notre 9 13 1996. University Dame, Indiana, September Following the week in the course a on same was held. Corsica, 5 day workshop topic Selected from the scheduled to 1998 workshop are papers appear early special volume of the International Journal Heat Thermo of Experimental Transfer, and Fluid All Mechanics. three events were Jean Paul dynamics, organized by Bonnet of Universit6 de Andrew Pollard of Univer Poitiers, France, Queen's at and Mohamed Gad el Hak of the of sity Kingston, Canada, University Notre U.S.A.
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Book Synopsis Experimental Study of the Effects of Surface Roughness on Laminar Boundary Layer Stability in Water by : Hyoun-Woo Shin
Download or read book Experimental Study of the Effects of Surface Roughness on Laminar Boundary Layer Stability in Water written by Hyoun-Woo Shin and published by . This book was released on 1982 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIAA 82-1165 - AIAA 82-1289. (With omissions in numbering) by :
Download or read book AIAA 82-1165 - AIAA 82-1289. (With omissions in numbering) written by and published by . This book was released on 1982 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1951 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Government-wide Index to Federal Research & Development Reports by :
Download or read book Government-wide Index to Federal Research & Development Reports written by and published by . This book was released on 1967 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
