Linear stability analysis reveals exclusion zone for sliding bed transport

[img]
Preview
PDF
Language: English
415Kb
Title:Linear stability analysis reveals exclusion zone for sliding bed transport
Creators:
Talmon, Arnold M.; arno dot talmon at deltares dot nl, a dot m dot talmon at tudelft dot nl; Delft University of Technology, Dept. 3Me, Mekelweg 2, 2628 CD, The Netherlands.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 63, 2, pp. 172-180
Uncontrolled Keywords:stratification, hydrotransport, transients, bed layer

Abstract

A bend or any another pipe component disturbs solids transport in pipes. Longitudinal pressure profiles downstream of such a component may show a stationary transient harmonic wave, as revealed by a recent settling slurry laboratory experiment. Therefore the fundamental transient response of the two-layer model for fully stratified flow is investigated as a first approach. A linear stability analysis of the sliding bed configuration is conducted. No stationary transient harmonic waves are found in this analysis, but adaptation lengths for exponential recovery are quantified. An example calculation is given for a 0.1 m diameter pipeline. Also consequences for long stretches of pipe line emerged. A so far undiscovered exclusion zone is found in the I-V diagram. This exclusion zone is situated adjacent to the deposit limit velocity locus curve. This simplified physical system reveals that flow velocities should be taken about 10% greater than the calculated maximum deposit limit velocity for stable converging flow.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Linear stability analysis reveals exclusion zone for sliding bed transport
Translated title:Linear stability analysis reveals exclusion zone for sliding bed transport
Creators:
Talmon, Arnold M.; arno dot talmon at deltares dot nl, a dot m dot talmon at tudelft dot nl; Delft University of Technology, Dept. 3Me, Mekelweg 2, 2628 CD, The Netherlands.
Uncontrolled Keywords:stratification, hydrotransport, transients, bed layer
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:63
Number:2
Page Range:pp. 172-180
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8397
Item Type:Article
Deposited On:07 Apr 2015 13:04
Last Modified:07 Apr 2015 11:04

Citation

Talmon, Arnold M. (2015) Linear stability analysis reveals exclusion zone for sliding bed transport. Journal of Hydrology and Hydromechanics, 63 (2). pp. 172-180. ISSN 0042-790X

Repository Staff Only: item control page