Sediment transport over fixed deposited beds in sewers - An appraisal of existing models

1997 ◽  
Vol 36 (8-9) ◽  
pp. 123-128 ◽  
Author(s):  
C. Nalluri ◽  
A. K. El-Zaemey ◽  
H. L. Chan
Keyword(s):  
Sediment Transport ◽  
Fixed Bed ◽  
Transport Equations ◽  
Design Criterion ◽  
Pipe Diameter ◽  
Transport Velocity

An appraisal of the existing sediment transport equations was made using May et al (1989) and Ackers (1991) sediment transport equations for the limit of deposition design criterion and with a deposit depth of 1% of the pipe diameter allowed in the sewers. The applicability of those equations for sewers with larger fixed bed deposit depth was assessed, the equations generally over-estimated the transport velocity. Modifications were made to enable the equations to apply to sewers with large fixed bed deposits present.

scholarly journals Effect of surface wave skewness on near-bed sediment transport velocity

2021 ◽  
Vol 229 ◽  
pp. 104549
Author(s):  
Barbara Stachurska ◽  
Ryszard Staroszczyk
Keyword(s):  
Surface Wave ◽  
Sediment Transport ◽  
Bed Sediment ◽  
Transport Velocity ◽  
Effect Of Surface

Wall-cooled fixed-bed reactors: Parametric sensitivity as a design criterion

AIChE Journal ◽  
1989 ◽  
Vol 35 (2) ◽  
pp. 287-292 ◽  
Author(s):  
Daniel O. Borio ◽  
Jorge E. Gatica ◽  
José A. Porras
Keyword(s):  
Fixed Bed ◽  
Design Criterion ◽  
Parametric Sensitivity ◽  
Fixed Bed Reactors

scholarly journals One-dimensional sediment transport modelling with Engelund–Hansen and Ackers–White transport equations for the Lower Danube River

2021 ◽  
pp. 103-117
Author(s):  
Davor Kvočka
Keyword(s):  
Sediment Transport ◽  
Negative Impact ◽  
Statistical Tests ◽  
Field Measurements ◽  
River Basin Management ◽  
Transport Equations ◽  
Danube River ◽  
Transport Modelling ◽  
1D Modelling ◽  
Sediment Transport Modelling

Sediment transport can have a negative impact on riparian environments, as it can lead to the deterioration of ecological diversity and increase flood risks. Sediment transport modelling is thus a key tool in river basin management and the development of river training structures. In this study, we examined the appropriateness of 1D modelling for total sediment transport loads using the Engelund–Hansen and Ackers–White transport equations for the Lower Danube River. The study evaluated the effect of sediment grading on the accuracy of 1D model results, the appropriateness of 1D sediment transport modelling within technical or engineering projects, and the appropriateness of the Engelund–Hansen and Ackers–White equations for estimating sediment yield in the area of the Lower Danube River. The model results have been compared to field measurements, with the accuracy of the modelling results being evaluated with statistical tests. The obtained results show: (i) the sediment grading does not have a significant impact on the 1D modelling results, (ii) 1D sediment transport modelling gives sufficiently accurate results for practical engineering use (e.g. the estimation of dredging activities), and (iii) the Engelund–Hansen equation is generally better for sediment transport modelling in the Lower Danube River.

Closure to “Sediment Transport in Smooth Fixed Bed Channels”

1977 ◽  
Vol 103 (7) ◽  
pp. 805-806
Author(s):  
Pavel Novak ◽  
Chandramouli Nalluri
Keyword(s):  
Sediment Transport ◽  
Fixed Bed

Extension of ENO and WENO schemes to one-dimensional sediment transport equations

2004 ◽  
Vol 33 (1) ◽  
pp. 31-56 ◽  
Author(s):  
N. Črnjarić-Žic ◽  
S. Vuković ◽  
L. Sopta
Keyword(s):  
Sediment Transport ◽  
Transport Equations ◽  
Weno Schemes ◽  
One Dimensional

Sediment transport by waves and currents

1983 ◽  
Vol 10 (1) ◽  
pp. 142-149 ◽  
Author(s):  
Michael C. Quick
Keyword(s):  
Sediment Transport ◽  
Mass Transport ◽  
Power Relationship ◽  
Zero Current ◽  
Transport Direction ◽  
Transport Velocity ◽  
Waves And Currents ◽  
Mass Transport Velocity ◽  
Combined Action ◽  
The Waves

Sediment transport is measured under the combined action of waves and currents. Measurements are made with currents in the direction of wave advance and with currents opposing the wave motion. Theoretical relationships are considered that predict the wave velocity field and the mass transport velocity for zero current and for steady currents.Following Bagnold's approach, a transport power relationship is developed to predict the sediment transport rate. Making assumptions for the mass transport velocity, the transport power is shown to agree with the measured sediment transport rates. It is particularly noted that the sediment transport direction is mainly determined by the direction of wave movement, even for adverse currents, until the waves start to break. Keywords: sediment transport, waves and currents, coastal engineering.

Design criterion for radial flow fixed-bed reactors

AIChE Journal ◽  
1983 ◽  
Vol 29 (6) ◽  
pp. 1039-1041 ◽  
Author(s):  
Hsueh-Chia Chang ◽  
Michael Saucier ◽  
J. M. Calo
Keyword(s):  
Radial Flow ◽  
Fixed Bed ◽  
Design Criterion ◽  
Fixed Bed Reactors

scholarly journals Genuinely Multi-Dimensional Non-Dissipative Finite-Volume Schemes for Transport

2007 ◽  
Vol 17 (3) ◽  
pp. 321-328 ◽  
Author(s):  
Bruno Després ◽  
Frédéric Lagoutière
Keyword(s):  
Finite Volume ◽  
Transverse Direction ◽  
Transport Equations ◽  
Discrete Solution ◽  
Finite Volume Schemes ◽  
Time Step ◽  
One Dimensional ◽  
Transport Velocity ◽  
Volume Algorithm ◽  
The One

Genuinely Multi-Dimensional Non-Dissipative Finite-Volume Schemes for TransportWe develop a new multidimensional finite-volume algorithm for transport equations. This algorithm is both stable and non-dissipative. It is based on a reconstruction of the discrete solution inside each cell at every time step. The proposed reconstruction, which is genuinely multidimensional, allows recovering sharp profiles in both the direction of the transport velocity and the transverse direction. It constitutes an extension of the one-dimensional reconstructions analyzed in (Lagoutière, 2005; Lagoutière, 2006).

Sign in / Sign up

Export Citation Format

Share Document