Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Albert Gyr"'
Autor:
Albert Gyr
Publikováno v:
Transport of Suspended Solids in Open Channels ISBN: 9780203735152
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5215acb27afcea56c79d6cd78cd1b44
https://doi.org/10.1201/9780203735152-6
https://doi.org/10.1201/9780203735152-6
Autor:
Albert Gyr
Publikováno v:
International Journal of Sediment Research. 26:378-386
Coherent structures develop due to an instability process on smooth beds under turbulent flow conditions and they are relevant for the incipient motion of fine sand sediment. Similar flow structures were found to be relevant for the sediment transpor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbca88ca630d79bc4085de2b76e1107a
https://doi.org/10.1016/s1001-6279(11)60101-7
https://doi.org/10.1016/s1001-6279(11)60101-7
Autor:
Albert Gyr, J. Bühler
Publikováno v:
Journal of Non-Newtonian Fluid Mechanics. 165:672-675
Secondary flows are always present when a turbulent Newtonian fluid flows through a square duct. We show that they are suppressed in surfactant solutions at maximum drag reduction. This result confirms the one-dimensional behaviour of such flows, whi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88702522c6826c12f1da7e0386caf134
https://doi.org/10.1016/j.jnnfm.2010.02.014
https://doi.org/10.1016/j.jnnfm.2010.02.014
Autor:
Wolfgang Kinzelbach, Albert Gyr
Publikováno v:
Applied Mechanics Reviews. 57:77-93
Bed forms in channels result from the interaction between sediment transport, turbulence and gravitational settling. They document mechanisms of self-organization between flow structures and the developing structure of the bed. It is shown that these
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74338dfd14751bbaaa3dda2cb7c975fe
https://doi.org/10.1115/1.1584063
https://doi.org/10.1115/1.1584063
Autor:
Albert Gyr
In 1976 a similar titled IUTAM Symposium (Structure of Turbulence and Drag Reduction) was held in Washington. However, the progress made during the last thirteen years as weil as the much promising current research desired a second one this year. In
The Second Monte Verita Colloquium Fundamental Problematic Issues in Turbu lence was held in Monte Verita, Switzerland, on March 23-27, 1998. The main goal of the Colloquium was to bring together in the relaxed atmo sphere of Monte Verita a group
Autor:
Klaus Hoyer, Albert Gyr
Publikováno v:
Journal of Fluids Engineering. 120:818-823
This paper deals with the nature of the heterogeneous drag reduction which occurs in turbulent pipe flows when a concentrated polymer solution is injected into the pipe center. According to earlier concepts, the achieved drag reduction is due to a di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1e7423f47d22ba20b0b975a12d2ef37
https://doi.org/10.1115/1.2820743
https://doi.org/10.1115/1.2820743
Autor:
Albert Gyr
Publikováno v:
Flow, Turbulence and Combustion. 60:235-255
A turbulent flow at modest Reynolds numbers (26,000–32,000, as defined in the text) over flat erodible sandy beds was investigated. The beds were composed of sand grains of uniform size with a diameter smaller than the viscous sublayer of the flow.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::552e13f221448bf59fb693f487f47909
https://doi.org/10.1023/a:1009990129943
https://doi.org/10.1023/a:1009990129943
Autor:
A Tsinober, Albert Gyr
Publikováno v:
Journal of Non-Newtonian Fluid Mechanics. 73:153-162
A critical discussion of the so-called ‘momentum deficit’ of drag reducing flows is followed by a simple unequivocal demonstration for the claim that the drag reduction phenomena in a number of fluid systems are of distinctly rheological nature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec979e959e3ccaf5b20cb9c187f087f6
https://doi.org/10.1016/s0377-0257(97)00055-4
https://doi.org/10.1016/s0377-0257(97)00055-4
Autor:
K. Hoyer, Albert Gyr
Publikováno v:
Journal of Non-Newtonian Fluid Mechanics. 65:221-240
Two-dimensional Laser Doppler Velocimetry and pressure drop measurements were carried out in a heterogeneously drag reduced turbulent pipe flow of 20 000 < Re < 30 000. A polymer solution of 0.75 wt.% PAMH was injected in the centerline of a 30 mm ×
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e155261670c014e5001df534c9e4d0a8
https://doi.org/10.1016/0377-0257(96)01460-7
https://doi.org/10.1016/0377-0257(96)01460-7